JP5274916B2 - Radiation imaging system - Google Patents

Description

  The present invention includes a radiation detection cassette having a radiation conversion panel that detects radiation transmitted through a subject and converts the detected radiation into radiation image information, and a power supply device that wirelessly supplies power to the radiation detection cassette. The present invention relates to an image capturing system.

  2. Description of the Related Art In the medical field, radiation image capturing apparatuses that irradiate a subject with radiation and guide the radiation transmitted through the subject to a radiation conversion panel to capture a radiation image are widely used. In this case, the radiation conversion panel may be a conventional radiation film in which the radiation image is exposed and recorded, or radiation energy as the radiation image is accumulated in a phosphor, and the radiation image is irradiated with excitation light. A stimulable phosphor panel that can be extracted as stimulated emission light is known. These radiation conversion panels supply the radiation film on which the radiation image is recorded to the developing device to perform development processing, or supply the storage phosphor panel to the reading device to perform reading processing, The radiation image as a visible image is obtained.

  On the other hand, in an operating room or the like, it is necessary to be able to immediately read out and display a radiation image from a radiation conversion panel after imaging in order to perform a quick and accurate treatment on a patient. Radiation detection using a solid-state detector that converts radiation directly into electrical signals, or converts radiation into visible light with a scintillator and then converts it into electrical signals to read out as a radiation conversion panel that can meet such demands A vessel has been developed.

  For example, Patent Document 1 discloses a technique related to a radiation detection cassette that transmits radiation image information obtained by a radiation detector to an image processing unit using a wireless transmission system. In this case, a battery is provided in the radiation detection cassette, and when charging the battery, a power cable is connected to the battery, the battery is removed and connected to an external charging device, and the battery is connected to the battery. It describes that wireless charging is performed by bringing a non-contact charging device close to each other.

JP 2001-224579 A

  By the way, in the above prior art, the radiation image information obtained by the radiation detector is wirelessly transmitted to the image processing means. However, in the case of wireless transmission, the radiation image information is easily affected by radio interference or noise. However, there is a problem that the generated radiographic image itself is not properly displayed.

  Furthermore, since the above-described conventional technology relies only on the battery having a built-in power source for the radiation detection cassette, for example, if the remaining battery level is insufficient while the radiation detection cassette is being used (during imaging), imaging is performed. It is necessary to interrupt and charge with a non-contact charging device. For this reason, especially when the radiation detection cassette is used during surgery, there is a possibility that a doctor cannot see a desired radiation image in real time.

  On the other hand, it is desirable that the number of cables connected to the radiation detection cassette be minimal in consideration of ease of handling in an operating room or the like.

  The present invention has been made in consideration of the above-described conventional problems, and can transmit radiation image information acquired by the radiation conversion panel of the radiation detection cassette to the image processing means with high accuracy and accuracy. An object of the present invention is to provide a radiographic imaging system that can improve the ease of handling of a radiation detection cassette.

The radiographic imaging system according to the present invention is:
A radiation conversion panel that detects radiation transmitted through a subject and converts it into radiation image information; and a radiation detection cassette that is connected to the radiation conversion panel and has transmission means that transmits the radiation image information to image processing means; and A radiographic imaging system comprising a power supply device that supplies power to a radiation detection cassette,
Transmission of the radiation image information to the image processing unit by the transmission unit is performed by wire through a signal line, while power supply from the power supply apparatus to the radiation detection cassette is performed wirelessly.

  According to such a configuration, the radiation image information obtained by the radiation conversion panel of the radiation detection cassette is transmitted by wire through the signal line, while the power supply device supplies power to the radiation detection cassette. Is performed wirelessly. As a result, it is possible to reliably prevent the radiographic image information to be transmitted from being affected by radio interference or noise from other electronic devices, and the radiographic image can be generated with high accuracy and accuracy. It becomes. Moreover, since the power supply to the radiation detection cassette is performed wirelessly, cables connected to the radiation detection cassette can be minimized. Therefore, the ease of handling of the radiation detection cassette is improved while preventing deterioration of the radiation image. Furthermore, since the power supply to the radiation detection cassette can always be performed wirelessly, it is possible to avoid interruptions in imaging and surgery due to a shortage of the battery remaining in the radiation detection cassette.

  In addition, the power supply device is provided with power transmission means for converting electrical energy and supplying the radiation detection cassette wirelessly, and the radiation detection cassette re-supposes the supply energy supplied from the power transmission means to electrical energy. When an energy conversion unit for converting and a power reception availability detection unit for detecting whether or not the radiation detection cassette is in a region where the supply energy supplied from the power transmission unit can be received are provided, for example, power supply It can be configured as a system that can automatically detect that the radiation detection cassette is disposed within the power supplyable area of the apparatus.

  In this case, the radiation detection cassette receives the identification data of the power supply device when the result that the power reception availability detection unit detects that the power reception is within the region where the power can be received, and sends the identification data to the external control device. A data control means for transmitting a wireless power feedable signal via the transmission means and the signal line is provided, and the control device corresponds to the identification data after receiving the wireless power feedable signal from the radiation detection cassette. When configured to transmit a power supply start signal to the power supply device, when the radiation detection cassette is arranged in the power supply available area of the power supply device, information is automatically transmitted and received between the radiation detection cassette and the power supply device. The radiation detection cassette can be driven and controlled so as to be capable of photographing. For example, even when a plurality of power supply apparatuses are installed, it is possible to appropriately and selectively perform a power supply operation from a corresponding desired power supply apparatus to the radiation detection cassette. For this reason, the ease of handling of the entire radiographic imaging system including the radiation detection cassette is improved.

  In the present invention, radiation image information obtained by the radiation conversion panel of the radiation detection cassette is transmitted by wire via the signal line, while power feeding from the power feeding device to the radiation detection cassette is performed wirelessly. For this reason, it is possible to reliably prevent the radiographic image information to be transmitted from being affected by radio interference or noise from other electronic devices, and to generate a radiographic image with high accuracy and accuracy. Become. In addition, since the power supply to the radiation detection cassette is performed wirelessly, the number of cables connected to the radiation detection cassette can be minimized. Therefore, the ease of handling of the radiation detection cassette is improved while preventing deterioration of the radiation image.

  As shown in FIG. 1, an operating table (bed) 16 on which a patient 14 lies is disposed in an operating room 12 in which a radiographic imaging system 10 according to the present embodiment is installed, and a doctor 18 uses it for an operation. An instrument table 20 on which various instruments to be placed is placed on the side of the operating table 16. In addition, around the operating table 16, various devices necessary for an operation, such as an anesthesia machine, an aspirator, an electrocardiograph, and a blood pressure monitor, are arranged.

  The radiographic imaging system 10 includes an imaging device 22 for irradiating a patient 14 as a subject with radiation X having a dose according to imaging conditions, and a radiation detector 40 for detecting the radiation X transmitted through the patient 14 (FIG. 2). A radiation detection cassette 24 with built-in), a power supply device 25 that wirelessly supplies power to the radiation detection cassette 24 (contactless), and a radiation image based on the radiation X detected by the radiation detector 40. A display device 26 for displaying, a photographing device 22, a radiation detection cassette 24, a power feeding device 25, and a console (control device) 28 for controlling the display device 26 are provided. The imaging device 22, the radiation detection cassette 24, the power feeding device 25, the display device 26, and the console 28 are connected by a power cable (power supply system) and a signal cable (signal system), respectively, and signals are transmitted and received. As described above, power supply to the radiation detection cassette 24 is performed wirelessly from the power supply device 25.

  The imaging device 22 is connected to the free arm 30 and can be moved to a desired position according to the imaging region of the patient 14 and can be retracted to a position that does not obstruct the operation by the doctor 18. Similarly, the power feeding device 25 is connected to a free arm 31 extending from the ceiling, and can be moved to a desired position according to the arrangement of the radiation detection cassette 24. Similarly, the display device 26 is connected to the free arm 32 and can be moved to a position where the doctor 18 can easily confirm the captured radiographic image. The power feeding device 25 and the display device 26 may be fixed to a ceiling, a wall, a floor, or the like.

  FIG. 2 is a partially cutaway perspective view of the radiation detection cassette 24 of FIG. The radiation detection cassette 24 includes a casing (housing) 34 made of a material that transmits the radiation X. Inside the casing 34 are a grid 38 that removes scattered radiation of the radiation X by the patient 14 from the irradiation surface 36 side of the casing 34 to which the radiation X is irradiated, and a radiation detector that detects the radiation X transmitted through the patient 14 ( Radiation conversion panel) 40 and lead plate 42 that absorbs backscattered rays of radiation X are arranged in this order. Note that the irradiation surface 36 of the casing 34 may be configured as a grid 38.

  Further, inside the casing 34, a power supply unit 44 for driving the radiation detection cassette 24, a cassette control unit 46 for driving and controlling the radiation detector 40 with electric power supplied from the power supply unit 44, and the radiation detector 40. And a transceiver 48 to which a signal cable (signal line) 47 for transmitting / receiving a signal including the information of the radiation X detected by the above and the console 28 is connected. The power supply unit 44 includes an energy conversion unit 49 (see FIG. 4) that reconverts the magnetic field M (energy, supplied energy) converted from electric energy into electric energy when applied from the power supply device 25. The cassette controller 46 and the transmitter / receiver 48 are preferably provided with a lead plate or the like on the irradiation surface 36 side of the casing 34 in order to avoid damage due to irradiation with the radiation X.

  FIG. 3 is a circuit configuration block diagram of the radiation detector 40. The radiation detector 40 has a photoelectric conversion layer 51 made of a material such as amorphous selenium (a-Se) that senses the radiation X and generates charges on an array of thin film transistor (TFT) 52. After the generated charge is stored in the storage capacitor 53, the TFT 52 is sequentially turned on for each row, and the charge is read as an image signal. In FIG. 3, only the connection relationship between one pixel 50 including the photoelectric conversion layer 51 and the storage capacitor 53 and one TFT 52 is shown, and the configuration of the other pixels 50 is omitted. Amorphous selenium must be used within a predetermined temperature range because its structure changes and its function decreases at high temperatures. Therefore, it is preferable to provide means for cooling the radiation detector 40 in the radiation detection cassette 24.

  A gate line 54 extending parallel to the row direction and a signal line 56 extending parallel to the column direction are connected to the TFT 52 connected to each pixel 50. Each gate line 54 is connected to a line scanning drive unit 58, and each signal line 56 is connected to a multiplexer 66 constituting a reading circuit.

  Control signals Von and Voff for controlling on / off of the TFTs 52 arranged in the row direction are supplied from the line scanning drive unit 58 to the gate line 54. In this case, the line scan driving unit 58 includes a plurality of switches SW1 for switching the gate lines 54 and an address decoder 60 for outputting a selection signal for selecting one of the switches SW1. An address signal is supplied from the cassette control unit 46 to the address decoder 60.

  In addition, the charge held in the storage capacitor 53 of each pixel 50 flows out to the signal line 56 through the TFTs 52 arranged in the column direction. This charge is amplified by the amplifier 62. A multiplexer 66 is connected to the amplifier 62 via a sample and hold circuit 64. The multiplexer 66 includes a plurality of switches SW2 for switching the signal line 56, and an address decoder 68 for outputting a selection signal for selecting one of the switches SW2. An address signal is supplied from the cassette control unit 46 to the address decoder 68. An A / D converter 70 is connected to the multiplexer 66, and radiation image information converted into a digital signal by the A / D converter 70 is supplied to the cassette control unit 46.

  FIG. 4 is a block explanatory diagram of the radiation image capturing system 10 including the imaging device 22, the radiation detection cassette 24, the power supply device 25, the display device 26, and the console 28. The console 28 is connected to a radiology information system (RIS) 29 for comprehensively managing radiographic image information and other information handled in the radiology department in the hospital. A medical information system (HIS) 33 for comprehensively managing information is connected.

  The imaging device 22 includes an imaging switch 72, a radiation source 74, a transceiver 76, and a radiation source controller 78.

  The transceiver 76 receives a shooting condition from the console 28 and transmits a shooting completion signal or the like to the console 28.

  The radiation source control unit 78 controls the radiation source 74 based on the imaging start signal supplied from the imaging switch 72 and the imaging conditions supplied from the transceiver 76. The radiation source 74 outputs the radiation X based on the control from the radiation source control unit 78.

  The power supply apparatus 25 receives a power supply start signal and the like from the power supply 80 connected to an external power supply (not shown) and the console 28, and transmits and receives ID information (identification data) and the like of the power supply apparatus 25 to the console 28. , An LC resonator (power transmission means) 84 that converts electric energy from the power source 80 into a magnetic field M and wirelessly supplies it to the power source unit 44 of the radiation detection cassette 24, and a power supply start signal supplied from the transceiver 82 And a power supply control unit 86 for controlling the LC resonator 84 based on the above.

  The radiation detection cassette 24 accommodates a radiation detector 40, a power supply unit 44, a cassette control unit 46, and a transceiver (transmission means) 48.

  The power supply unit 44 receives the magnetic field M applied from the LC resonator 84 of the power supply device 25 and reconverts it into electric energy, and the electric energy reconverted by the LC resonator 88 in a desired manner. An energy conversion unit 49 having a power supply 90 that supplies the radiation detector 40, the cassette control unit 46, and the transceiver 48 as electric power, and a battery 92 that can be charged from the power supply 90 are provided. Further, the power supply unit 44 is arranged in parallel with the LC resonator 88 and detects the detection LC resonator 94 smaller than the LC resonator 88 and the electric energy reconverted by the detection LC resonator 94. Thus, an energy detection unit (power reception availability detection unit) 96 that detects that the radiation detection cassette 24 is within the power supplyable area of the power supply device 25 and transmits a power supply area detection signal to the cassette control unit 46 is provided. . As described above, a known power transmission technique that uses the resonance of the magnetic field M from the LC resonator 84 to the LC resonator 88 configured by an LC resonance circuit having a coil and a capacitor from the power supply device 25 to the radiation detection cassette 24. Is used to supply power wirelessly.

  The cassette controller 46 includes an address signal generator (address signal generator) 98, an image memory 100, an operation manager 102, a cassette ID memory 104, and a data manager (data controller) 106.

  The address signal generator 98 supplies an address signal to the address decoder 60 of the line scan driver 58 and the address decoder 68 of the multiplexer 66 that constitute the radiation detector 40. The image memory 100 stores radiation image information detected by the radiation detector 40. The operation management unit 102 controls the driving of the radiation detection cassette 24 by controlling the driving of the power supply unit 44. The cassette ID memory 104 stores cassette ID information for specifying the radiation detection cassette 24. The data management unit 106 manages ID information (identification data) for specifying the power supply device 25 corresponding to the power supply of the radiation detection cassette 24, a power supply area detection signal from the energy detection unit 96, and the like.

  The transmitter / receiver 48 receives the transmission request signal and the ID information of the power supply device 25 from the console 28 via the signal cable 47, while storing the radiation image information stored in the image memory 100 and the cassette ID memory 104 for the console 28. The cassette ID information and the wireless power feed enable signal from the data management unit 106 based on the feed area detection signal from the energy detection unit 96 are transmitted via the signal cable 47.

  On the other hand, the display device 26 displays a receiver 110 that receives radiation image information from the console 28, a display control unit 112 that performs display control of the received radiation image information, and radiation image information processed by the display control unit 112. Display unit 114.

  The console 28 includes a transceiver 116, an imaging condition management unit 118, an image processing unit (image processing means) 120, an image memory 122, a patient information management unit 124, a cassette information management unit 126, and a power supply information management unit. 128.

  The transmitter / receiver 116 transmits / receives necessary information including radiographic image information to / from the imaging device 22, the radiation detection cassette 24, and the display device 26. The photographing condition management unit 118 manages photographing conditions necessary for photographing by the photographing device 22. The image processing unit 120 performs image processing on the radiation image information transmitted from the radiation detection cassette 24. The image memory 122 stores the image processed radiation image information. The patient information management unit 124 manages patient information of the patient 14 to be imaged. The cassette information management unit 126 manages the cassette information including the wireless power feedable signal and the cassette ID information transmitted from the radiation detection cassette 24. The power supply information management unit 128 manages ID information and the like transmitted from the power supply device 25. The console 28 may be installed outside the operating room 12 as long as signals can be transmitted to and received from the imaging device 22, the radiation detection cassette 24, and the display device 26.

  The imaging conditions are conditions for determining a tube voltage, a tube current, an irradiation time, and the like for irradiating radiation X having an appropriate dose to an imaging region of the patient 14. And conditions such as a photographing method. The patient information is information for identifying the patient 14 such as the name, sex, and patient ID number of the patient 14. The imaging ordering information including these imaging conditions and patient information can be set directly on the console 28 or supplied to the console 28 from the outside via the RIS 29.

  Further, the cassette information includes a wireless power supply enable signal from the data management unit 106 in addition to the cassette ID information for specifying the radiation detection cassette 24.

  The radiographic image capturing system 10 according to the present embodiment is basically configured as described above, and the operation thereof will be described next.

  The radiographic image capturing system 10 is installed in the operating room 12 and is used, for example, when a radiographic image needs to be captured during surgery of the patient 14 by the doctor 18. Therefore, the patient information of the patient 14 to be imaged is registered in advance in the patient information management unit 124 of the console 28 prior to imaging. In addition, when an imaging region and an imaging method are determined in advance, these imaging conditions are registered in the imaging condition management unit 118 in advance. In the state where the above preparatory work is completed, the operation for the patient 14 is performed.

  In order to take a radiographic image during surgery, a doctor 18 or a radiographer in charge takes a radiation detection cassette with the irradiation surface 36 facing the imaging device 22 at a predetermined position between the patient 14 and the operating table 16. 24 is installed.

  At this time, the power feeding device 25 is driven in advance in a predetermined operation condition (low output operation) in conjunction with the operation start of the console 28 or by operation of an operation start switch (not shown). Therefore, the radiation detection cassette 24 can detect that the radiation detection cassette 24 is disposed in the power supplyable area of the power supply device 25 by the detection LC resonator 94 and the energy detection unit 96 of the power supply unit 44. That is, the energy detection unit 96 functions as a power reception availability detection unit that detects whether or not the radiation detection cassette 24 is in an area where power can be received from the power feeding device 25. In this state, under the control of the power supply control unit 86 in the power supply device 25, the detection LC resonator 94 and the energy detection unit 96 of the radiation detection cassette 24 determine whether or not the magnetic field M from the LC resonator 84 of the power supply device 25 exists. Low power operation is applied to apply a weak magnetic field that can be detected. For this reason, useless power consumption of the power supply device 25 can be suppressed.

  Subsequently, in the radiation detection cassette 24, when the power supply area detection signal is supplied from the energy detection unit 96 to the data management unit 106, the data management unit 106 supplies power supply information of the console 28 via the transceivers 82 and 116. The ID information of the power feeding device 25 stored in the management unit 128 is received from the transceiver 48 by the signal cable 47, while the wireless power feedable signal is transmitted to the cassette information management unit 126 by the signal cable 47 via the transceivers 48 and 116. And send. Accordingly, since the power supply start signal is transmitted from the cassette information management unit 126 to the power supply device 25 via the transceivers 116 and 82, the power supply control unit 86 starts the power supply to the radiation detection cassette 24 in order to start power supply to the LC resonator. 84 is controlled. That is, the power feeding device 25 is driven under predetermined operating conditions (high power operation, power feeding operation) in which the magnetic field M applied from the LC resonator 84 to the radiation detection cassette 24 is changed to a strong magnetic field. Thereby, in the radiation detection cassette 24, the magnetic field M from the LC resonator 84 is converted into electric energy by the LC resonator 88 based on a control command from the operation management unit (control unit) 102 to the energy conversion unit 49, and the power is supplied. 90. At the same time, power supply from the power supply 90 to the radiation detector 40 and the like is started to complete preparation for imaging.

  In the radiographic imaging system 10, the ID information of the corresponding power supply device 25 can be confirmed between the radiation detection cassette 24 and the power supply device 25 via the console 28 as described above. For this reason, for example, even when a plurality of power supply devices are installed, it is possible to perform power supply operation appropriately and selectively from the corresponding desired power supply device to the radiation detection cassette 24. Etc. can be avoided.

  Next, after moving the imaging device 22 to a position facing the radiation detection cassette 24, the imaging switch 72 is operated to capture a radiographic image.

  In this case, due to the operation of the imaging switch 72 by the doctor 18 or the radiographer, the radiation source controller 78 of the imaging apparatus 22 requests the console 28 to transmit imaging conditions via the transceivers 76 and 116. To do. Based on the received request, the console 28 transmits imaging conditions related to the imaging region of the patient 14 registered in the imaging condition management unit 118 to the imaging apparatus 22 via the transceivers 116 and 76. When receiving the imaging conditions, the radiation source control unit 78 controls the radiation source 74 in accordance with the imaging conditions, and irradiates the patient 14 with radiation X having a predetermined dose.

  The radiation X transmitted through the patient 14 is radiated to the radiation detector 40 after the scattered radiation is removed by the grid 38 of the radiation detection cassette 24, and is electrically applied by the photoelectric conversion layer 51 of each pixel 50 constituting the radiation detector 40. It is converted into a signal and held as a charge in the storage capacitor 53 (see FIG. 3). Next, the charge information, which is the radiation image information of the patient 14 held in each storage capacitor 53, is in accordance with the address signal supplied from the address signal generator 98 constituting the cassette controller 46 to the line scan driver 58 and the multiplexer 66. Read out.

  That is, the address decoder 60 of the line scan driver 58 outputs a selection signal according to the address signal supplied from the address signal generator 98, selects one of the switches SW1, and the TFT 52 connected to the corresponding gate line 54. A control signal Von is supplied to the gates of the two. On the other hand, the address decoder 68 of the multiplexer 66 outputs a selection signal in accordance with the address signal supplied from the address signal generation unit 98, sequentially switches the switch SW2, and is connected to the gate line 54 selected by the line scan driving unit 58. Radiation image information, which is charge information held in the storage capacitor 53 of each pixel 50, is sequentially read out via the signal line 56.

  The radiation image information read from the storage capacitor 53 of each pixel 50 connected to the selected gate line 54 of the radiation detector 40 is amplified by each amplifier 62 and then sampled by each sample and hold circuit 64. The signal is supplied to the A / D converter 70 via the multiplexer 66 and converted into a digital signal. The radiographic image information converted into the digital signal is temporarily stored in the image memory 100 of the cassette control unit 46.

  Similarly, the address decoder 60 of the line scan driving unit 58 sequentially switches the switch SW1 in accordance with the address signal supplied from the address signal generating unit 98, and the storage capacitor 53 of each pixel 50 connected to each gate line 54. The stored radiation image information, which is charge information, is read through the signal line 56 and stored in the image memory 100 of the cassette control unit 46 through the multiplexer 66 and the A / D converter 70.

  The radiation image information stored in the image memory 100 is transmitted to the console 28 by the signal cable 47 via the transceiver 48. The radiographic image information transmitted to the console 28 is received by the transmitter / receiver 116, subjected to predetermined image processing in the image processing unit 120, and then associated with the patient information of the patient 14 registered in the patient information management unit 124. Stored in the image memory 122.

  The radiographic image information subjected to the image processing is transmitted from the transceiver 116 to the display device 26. The display device 26 that has received the radiation image information by the receiver 110 controls the display unit 114 by the display control unit 112 to display the radiation image. The doctor 18 performs the operation while confirming the radiographic image displayed on the display unit 114.

  As described above, in the radiographic image capturing system 10 according to the present embodiment, when the radiation detection cassette 24 is used (at the time of imaging), power is supplied to a position where the radiation detection cassette 24 can always be wirelessly powered. A device 25 is arranged. For this reason, since it is possible to perform imaging without connecting a power cable to the radiation detection cassette 24 other than the signal cable 47, it is possible to improve not only the radiation detection cassette 24 but also the ease of handling of the entire system. In addition, it is possible to effectively avoid interruption of imaging and surgery due to a shortage of the remaining battery capacity of the radiation detection cassette 24.

  On the other hand, the radiation image information acquired and converted by the radiation detector 40 is transmitted from the radiation detection cassette 24 to the console 28 by wire via a signal cable 47 connecting the transceivers 48 and 116. For this reason, compared with the case where radiographic image information is transmitted wirelessly as in the above-described prior art, it is ensured that the transmitted radiographic image information is affected by radio interference or noise from other electronic devices. Therefore, it is possible to generate a radiographic image with high accuracy and accuracy. In this case, there is no power cable between the radiation detection cassette 24 and the console 28, and only the signal cable 47 is connected. That is, the number of cables connected to the radiation detection cassette 24 is minimized. This makes it possible to improve the ease of handling of the radiation detection cassette 24 while preventing deterioration of the radiation image.

  Moreover, in the case of the present embodiment, wireless power feeding is performed by the power feeding device 25 in order to improve the ease of handling of the radiation detection cassette 24. The magnetic field M applied from the power feeding device 25 to the radiation detection cassette 24, etc. Since it is possible to reliably prevent radiation image information from being affected, it is extremely effective to use the signal cable 47 for transmission / reception of radiation image information. In this case, the signal cable 47 connected from the radiation detection cassette 24 to the console 28 is surrounded by a noise prevention shield 47a (see FIG. 2). For example, the internal signal line is twisted pair and the signal line bundle is grounded. The signal cable 47 is configured by covering with the covered coating. Accordingly, it is possible to further reduce the influence of electromagnetic waves of other electronic devices etc. on the signal cable 47 that transmits radiation image information and the like, effectively avoiding noise in the radiation image information, and reducing image degradation. It becomes possible to suppress more reliably.

  Further, in the radiographic imaging system 10, when the radiation detection cassette 24 is arranged in the power supplyable area of the corresponding power supply device 25, the radiation detection cassette 24 and the power supply device 25 are automatically connected via the console 28. Is transmitted and received, and the radiation detection cassette 24 is driven and controlled to be ready for imaging. Therefore, in the radiation detection cassette 24, it is not necessary to start up in a preparation state in which imaging can be performed in advance using the battery 92 or the like, and it is not necessary to provide a manual operation switch or the like. Furthermore, it is possible to prevent a shooting mistake caused by forgetting to operate the operation switch. In addition, since transmission / reception of information between the console 28 and the radiation detection cassette 24 is performed by wire via the signal cable 47, the radio power supply enable signal is transmitted to the radiation detection cassette 24 as in the case of the radiation image information. To the console 28 accurately and reliably. Thereby, the handleability of the radiographic imaging system 10 including the radiation detection cassette 24 can be further improved.

  Further, since the radiation detection cassette 24 includes the battery 92 together with the power supply 90, the battery 92 can be charged with surplus power by driving the radiation detection cassette 24 by the power supply 90. Similarly, the power from the detection LC resonator 94 can be supplied from the power supply 90 to the battery 92 and stored. In other words, in the radiation detection cassette 24, it is not necessary to perform only the charging operation of the battery 92, and the battery 92 can be charged at the same time when the radiation detection cassette 24 is used.

  In addition, when the radiation detection cassette 24 is used, the energy detection unit 96 supplies the operation management unit 102 with or without the magnetic field M from the LC resonator 84 (appropriate output). Therefore, for example, when the power supply device 25 fails or the magnetic field M from the LC resonator 84 becomes unstable while using the radiation detection cassette 24 (during imaging), a desired magnetic field is generated by the energy detection unit 96. In such a case, the operation management unit (power source selection unit) 102 drives the radiation detection cassette 24, and the radiation detector 40, the cassette control unit 46, and the transceiver 48. Can be switched from the power source 90 to the battery 92. For this reason, it is possible to avoid the radiation detection cassette 24 from becoming inoperable during imaging, and it is possible to prevent interruption of imaging and surgery. That is, in the radiation detection cassette 24, since the battery 92 can be used together with the power source 90, the driving stability can be improved. Of course, the radiation detection cassette 24 can be driven only by the battery 92 that does not use the power supply device 25 as necessary. Of course, it is also possible to charge only the battery 92 by the power feeding device 25 or other power feeding device having the same configuration other than during photographing.

  Further, as described above, when the desired magnetic field M is not detected by the energy detection unit 96, for example, a wireless power supply impossible signal is transmitted from the data management unit 106 to the cassette information management unit 126 via the transceivers 48 and 116. Good. Then, for example, the wireless power supply impossible signal is transmitted from the transceiver 116 to the receiver 110, and the display unit (notification unit) 114 can notify the doctor or the like to that effect.

  In such a radiographic imaging system 10, it is determined whether or not the radiation detection cassette 24 is in the power supplyable area of the power supply device 25, that is, whether or not the radiation detection cassette 24 is in an area where power can be received from the power supply device 25. Although the detection LC resonator 94 and the energy detection unit 96 are used as the power reception availability detection unit to detect, other than this, for example, as shown in FIG. Instead of the detection LC resonator 94 and the energy detection unit 96 of the cassette 24, a radiographic imaging system 10a provided with a receiver 95 and a power reception availability detection unit 97 may be configured.

  In this case, for example, a signal indicating an area where power can be supplied is transmitted from the transmitter 85 to the receiver 95 via wireless communication that has directivity and limits the communication area, and does not affect other wireless communication or the like. Is done. Further, by using an LED (light emitter) instead of the transmitter 85 and using a light receiver instead of the receiver 95, the same detection can be performed.

  In addition, the radiographic imaging system 10 which concerns on this embodiment is not limited to above-described embodiment, Of course, it can change freely to various structures.

  In the radiographic image capturing system 10 according to the present embodiment, the radiographic image is used during the operation and displayed on the display device 26. However, the present invention can also be applied to a case where only a normal radiographic image is captured other than during the operation. Needless to say.

  The power supply device 25 only needs to be able to supply power to the radiation detection cassette 24 wirelessly (contactlessly). For example, instead of the LC resonators 84 and 88 and the detection LC resonator 94, each of them is a dielectric. It may be configured by a body and an electric field may be used instead of the magnetic field M, and may be other than the so-called resonance type wireless power feeding apparatus as described above. That is, as the supply energy obtained by converting the electrical energy supplied from the power supply device 25 to the radiation detection cassette 24, for example, light energy, heat energy, or the like can be applied.

  Furthermore, in the radiographic imaging system 10 according to the present embodiment, for example, the radiation detector 40 accommodated in the radiation detection cassette 24 converts the dose of the incident radiation X directly into an electrical signal by the photoelectric conversion layer 51. However, instead of this, the incident radiation X is once converted into visible light by a scintillator, and then this visible light is converted into an electrical signal using a solid-state detection element such as amorphous silicon (a-Si). A radiation detector may be used (see Japanese Patent No. 3494683).

  Furthermore, radiation image information can be acquired using a light conversion type radiation detector. In this light conversion type radiation detector, when radiation is incident on each solid detection element arranged in a matrix, an electrostatic latent image corresponding to the dose is accumulated and recorded in the solid detection element. When reading the electrostatic latent image, the radiation detector is irradiated with reading light, and the value of the generated current is acquired as radiation image information. The radiation detector can erase and reuse the radiation image information that is the remaining electrostatic latent image by irradiating the radiation detector with erasing light (see Japanese Patent Laid-Open No. 2000-105297). .

  Furthermore, for example, transmission / reception of signals among the imaging device 22, the power supply device 25, the display device 26, the console 28, and the like can be performed by wireless communication.

  Further, when the radiation detection cassette 24 is used in the operating room 12 or the like, there is a risk that blood or other germs may adhere. Therefore, the radiation detection cassette 24 has a waterproof and airtight structure and is sterilized and washed as necessary, so that one radiation detection cassette 24 can be used repeatedly.

  Furthermore, the radiation detection cassette 24 is not limited to being used in the operating room 12, and can be applied to, for example, a medical examination or a round in a hospital.

  Furthermore, wireless communication between the radiation detection cassette 24 and the external device (wireless power supply by the power supply device 25) may be performed by optical wireless communication using infrared rays or the like instead of normal communication by radio waves. Good.

  Furthermore, it is more preferable to configure the radiation detection cassette 500 as shown in FIG. In FIG. 6, the signal cable 47 is not shown.

  That is, in the radiation detection cassette 500, the guide line 504 serving as a reference for the imaging region and the imaging position is formed on the radiation irradiation surface side of the casing 502. Using this guide line 504, the subject (patient 14) is positioned with respect to the radiation detection cassette 500, and the radiation image information can be recorded in an appropriate imaging region by setting the radiation X irradiation range. .

  A display unit 506 for displaying various types of information related to the radiation detection cassette 500 is disposed in a portion outside the imaging region of the radiation detection cassette 500. The display unit 506 includes the ID information of the patient 14 recorded in the radiation detection cassette 500, the number of times the radiation detection cassette 500 is used, the cumulative exposure dose, and the power supply unit 44 (battery 92) built in the radiation detection cassette 500. Charging state (remaining capacity), radiographic image information imaging conditions, positioning image of the patient 14 with respect to the radiation detection cassette 500, and the like are displayed. In this case, for example, the radiologist confirms the patient 14 according to the ID information displayed on the display unit 506, confirms in advance that the radiation detection cassette 500 is in a usable state, and displays the displayed positioning image. Based on the above, it is possible to position the desired imaging region of the patient 14 in the radiation detection cassette 500 and to perform imaging of optimal radiation image information.

  In addition, by forming the handle portion 508 in the radiation detection cassette 500, the radiation detection cassette 500 can be easily handled and carried.

  On the side of the radiation detection cassette 500, an AC adapter input terminal 510, a USB (Universal Serial Bus) terminal 512, and a card slot 516 for loading a memory card 514 are preferably provided.

  The input terminal 510 has sufficient time to charge the power supply unit 44 (battery 92) when the charging function of the power supply unit 44 (battery 92) built in the radiation detection cassette 500 is deteriorated. When this is not possible, the radiation detection cassette 500 can be immediately used by connecting an AC adapter and supplying power from the outside.

  The USB terminal 512 or the card slot 516 can be used when the radiation detection cassette 500 cannot transmit / receive information to / from an external device such as the console 28 by wired communication. In other words, by connecting a cable to the USB terminal 512, information can be transmitted / received to / from an external device by wired communication. In addition, information can be transmitted and received by loading a memory card 514 into the card slot 516, recording necessary information on the memory card 514, and then removing the memory card 514 and loading it into an external device.

  As shown in FIG. 7, a radiation detection cassette 24 is loaded and a cradle 518 for charging the built-in power supply unit 44 (battery 92) is preferably disposed at a necessary location in the operating room 12 or hospital. . In this case, the cradle 518 is required not only for charging the power supply unit 44 (battery 92) but also for external devices such as the RIS 29, the HIS 33, and the console 28 using the wireless communication function or the wired communication function of the cradle 518. Information may be transmitted and received. The information to be transmitted and received can include radiation image information recorded in the radiation detection cassette 24 loaded in the cradle 518.

  In addition, a display unit 520 is provided in the cradle 518, and necessary information including the charged state of the loaded radiation detection cassette 24 and the radiation image information acquired from the radiation detection cassette 24 is displayed on the display unit 520. You may make it display.

  Further, a plurality of cradles 518 are connected to a network, and the charging states of the radiation detection cassettes 24 loaded in the respective cradles 518 are collected via the network, and the location of the radiation detection cassettes 24 in a usable charging state is confirmed. It can also be configured to be able to.

  Of course, the radiographic imaging system according to the present invention is not limited to the above-described embodiments, and various configurations can be adopted without departing from the gist of the present invention.

It is explanatory drawing of the operating room where the radiographic imaging system of this embodiment was installed. It is a partially cutaway perspective view of the radiation detection cassette shown in FIG. It is a circuit block diagram of the radiation detector of FIG. It is block explanatory drawing of the radiographic imaging system shown in FIG. It is block explanatory drawing of the modification of the radiographic imaging system shown in FIG. It is another block diagram of a radiation detection cassette. It is a block diagram of the cradle which charges a radiation detection cassette.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 10a ... Radiation image imaging system 12 ... Operating room 22 ... Imaging device 24, 500 ... Radiation detection cassette 25 ... Power supply device 26 ... Display device 28 ... Console 40 ... Radiation detector 44 ... Power supply unit 46 ... Cassette control unit 47 ... Signal cable 48, 76, 82, 116 ... Transmitter / receiver 49 ... Energy converter 74 ... Radiation source 80, 90 ... Power source 84, 88 ... LC resonator 85 ... Transmitter 86 ... Feed control unit 92 ... Battery 94 ... LC for detection Resonator 95 ... Receiver 96 ... Energy detection unit 97 ... Power reception availability detection unit 102 ... Operation management unit 106 ... Data management unit 120 ... Image processing unit 126 ... Cassette information management unit 128 ... Power supply information management unit

Claims (1)

A radiation conversion panel that detects radiation that has passed through the subject and converts it into radiation image information; and a radiation detection cassette that is connected to the radiation conversion panel and has transmission means that transmits the radiation image information to image processing means;
A power supply device for supplying power to the radiation detection cassette;
A control device for controlling the radiation detection cassette and the power supply device, the image processing means for processing the radiation image information;
A radiographic imaging system comprising:
While the transmission means transmits the radiation image information to the image processing means by wire via a signal line,
The power supply from the power supply device to the radiation detection cassette is performed wirelessly ,
The power feeding device is provided with power transmission means for converting electric energy and supplying the radiation detection cassette wirelessly,
The radiation detection cassette has an energy conversion unit that reconverts supply energy supplied from the power transmission means into electrical energy, and the radiation detection cassette is in a region where the supply energy supplied from the power transmission means can be received. And receiving the identification data of the power feeding device from the control device when a result of being in the power receiving area is detected by the power receiving availability detecting unit and the power receiving availability detecting unit. And a data control means for transmitting a wireless power feedable signal to the control device via the transmission means and the signal line,
The control device, after said from the radiation detecting cassette receiving the wireless power supply enable signal, a radiographic image capturing system characterized that you send a feeding start signal to the power supply device corresponding to the identification data.

Images