CN110693512B - Scanning control method, device, equipment and storage medium - Google Patents
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Abstract
The embodiment of the application discloses a scanning control method, a device, equipment and a storage medium, relating to the technical field of medical equipment, wherein the method specifically comprises the following steps: acquiring scanning parameters and machine parameters of CT equipment; determining a scanning position when scanning according to the scanning parameters, the machine parameters and the area to be scanned; and scanning the area to be scanned according to the determined scanning position. According to the technical scheme, the scanning position is determined based on the acquired scanning parameters and the machine parameters, so that the radiation dose when CT scanning is performed on the object to be scanned is reduced when the scanning is performed based on the determined scanning position, the influence on the health of the object to be scanned is reduced, and the utilization rate of medical resources is improved.
Description
Technical Field
The embodiment of the application relates to the technical field of medical equipment, in particular to a scanning control method, a scanning control device, scanning control equipment and a storage medium.
Background
Common scanning modes of CT (Computed Tomography) equipment include three modes of flat slice, axial scan and helical scan. In order to effectively acquire the scan data of the region of interest during the helical scan, a reconstruction range is generally set according to the region of interest, and a scan start position is set to be a certain amount before the start position of the reconstruction range.
However, the radiation dose of the object to be scanned during CT scanning is increased by adopting the mode, so that not only can the health of the object to be scanned be affected to a certain extent, but also the medical resource waste is caused, and the medical resource utilization rate is reduced.
Disclosure of Invention
The application provides a scanning control method, a device, equipment and a storage medium, which are used for reducing radiation dose when CT scanning is carried out on an object to be scanned, reducing health influence on the object to be scanned and improving medical resource utilization rate.
In a first aspect, an embodiment of the present application provides a scan control method, including:
acquiring scanning parameters and machine parameters of CT equipment;
determining a scanning position when scanning according to the scanning parameters, the machine parameters and the area to be scanned;
and scanning the area to be scanned according to the determined scanning position.
Optionally, the scanning parameters include a pitch, a collimation width and a radius of a scanning visual field corresponding to the area to be scanned; the machine parameters include positional information of the focal point of the bulb.
Optionally, determining the scanning position when scanning according to the scanning parameter, the machine parameter and the area to be scanned includes:
according to the screw pitch, determining the feeding amount of the scanning bed when moving;
determining a scanning offset according to the collimation width, the radius of the scanning visual field and the position information of the bulb tube focus;
and determining a target scanning position according to the feeding amount, the difference value of the scanning offset and the original scanning position corresponding to the area to be scanned.
Optionally, determining the target scanning position according to the feeding amount, the difference value of the scanning offset and the original scanning position corresponding to the area to be scanned includes:
determining a scanning advance according to the difference value of the feeding amount and the scanning offset;
determining the initial coordinate of the target scanning position according to the difference value between the initial coordinate of the original scanning position and the scanning advance;
determining the termination coordinate of the target scanning position according to the difference value between the termination coordinate of the original scanning position and the scanning lead;
correspondingly, scanning the area to be scanned according to the determined scanning position comprises the following steps:
and scanning the area to be scanned according to the determined starting coordinate and ending coordinate of the target scanning position.
Optionally, the position information of the bulb focus is a distance between the bulb focus and a reference isocenter position.
In a second aspect, an embodiment of the present application further provides a scan control device, including:
the parameter acquisition module is used for acquiring scanning parameters and machine parameters of the CT equipment;
the scanning position determining module is used for determining the scanning position when scanning according to the scanning parameters, the machine parameters and the area to be scanned;
and the scanning module is used for scanning the area to be scanned according to the determined scanning position.
In a third aspect, embodiments of the present application further provide a CT apparatus, including:
one or more processors;
a memory for storing one or more programs;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement a scan control method as provided by the embodiments of the first aspect.
In a fourth aspect, embodiments of the present application further provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a scan control method as provided by the embodiments of the first aspect.
According to the embodiment of the application, the scanning parameters and the machine parameters of the CT equipment are obtained, the scanning position during scanning is determined according to the scanning parameters, the machine parameters and the area to be scanned, and the area to be scanned is scanned according to the determined scanning position. According to the technical scheme, the scanning position is determined based on the acquired scanning parameters and the machine parameters, so that the radiation dose when CT scanning is performed on the object to be scanned is reduced when the scanning is performed based on the determined scanning position, the influence on the health of the object to be scanned is reduced, and the utilization rate of medical resources is improved.
Drawings
FIG. 1A is a flow chart of a scan control method in a first embodiment of the application;
FIG. 1B is a schematic diagram of a scanning position determination process according to a first embodiment of the present application;
fig. 2 is a block diagram of a scanning control device in a second embodiment of the present application;
fig. 3 is a block diagram of a CT apparatus in a third embodiment of the present application.
Detailed Description
The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present application are shown in the drawings.
Example 1
Fig. 1A is a flowchart of a scan control method in a first embodiment of the application, which is applicable to a case of performing CT scan on a region to be scanned of an object to be scanned by a CT apparatus. The method is executed by a scanning control device which is realized by software and/or hardware and is specifically configured in a data processing system of the CT equipment.
A scan control method as shown in fig. 1A, comprising:
s110, acquiring scanning parameters and machine parameters of the CT equipment.
The scan parameters may be preset in the CT apparatus before scanning is performed, and the scan parameters may be set before using the CT apparatus, and in general, the scan parameters may be preset in different scan protocols.
Referring to fig. 1B, exemplary scan parameters include a pitch p, a collimation width C, and a radius R of a scan field of view corresponding to the region to be scanned.
The pitch is used for measuring the moving speed of the scanning bed in the scanning process and is the ratio of the feeding amount of the scanning bed to the collimation width when the scanning frame rotates for one circle; the collimation width is the width of the collimator and is used for limiting the width of the ray beam; the scan Field View (FOV) corresponding to the region to be scanned is used to define the reconstruction range Of the region to be scanned.
Wherein, the machine parameter is related to the physical structure of the CT equipment and is used for representing the position relation among different hardware in the CT equipment. The machine parameters of the CT apparatus include, for example, the position information of the focal point of the bulb, such as the distance S between the center of the bulb and the reference isocenter, and the distance S between the center of the bulb and the detector 1 Distance S between detector and reference isocenter 2 Etc.
S120, determining a scanning position when scanning according to the scanning parameters, the machine parameters and the area to be scanned.
The scanning position comprises a scanning starting position and a scanning ending position and is used for limiting a scanning range when the corresponding area to be scanned is scanned.
Illustratively, determining the scanning position when scanning according to the scanning parameters, the machine parameters and the area to be scanned may be: according to the screw pitch, determining the feeding amount of the scanning bed when moving; determining a scanning offset according to the collimation width, the radius of the scanning visual field and the position information of the bulb tube focus; and determining a target scanning position according to the feeding amount, the difference value of the scanning offset and the original scanning position corresponding to the area to be scanned.
Specifically, the amount of bed entry when the scanning bed is moving is determined according to the following formula:
l 1 ＝p×C；
wherein l 1 Is the feeding amount; p is the pitch; c is the collimation width.
Specifically, the scan offset is determined according to the following formula:
wherein l 0 For the scanning offset, S is the distance between the center of the bulb and the reference isocenter, S 1 Distance between center of bulb and detector, and distance S between detector and reference isocenter 2 。
Illustratively, determining the target scanning position according to the feeding amount, the difference value of the scanning offset amounts and the original scanning position corresponding to the area to be scanned may be: determining a scanning advance according to the difference value of the feeding amount and the scanning offset; determining the initial coordinate of the target scanning position according to the difference value between the initial coordinate of the original scanning position and the scanning advance; and determining the termination coordinate of the target scanning position according to the difference value between the termination coordinate of the original scanning position and the scanning lead.
Specifically, the scanning advance Δl is determined according to the following formula:
Δl＝l 1 -l 0 ；
the start and end coordinates of the target scan position are determined according to the following formulas:
wherein the original scanning position is the initial coordinate x 1 The termination coordinate is y 1 The method comprises the steps of carrying out a first treatment on the surface of the The initial coordinate of the target scanning position is x 2 The termination coordinate is y 2 。
The forward direction of the original scanning position and the target scanning position is the advancing direction z of the scanning bed.
S130, scanning the area to be scanned according to the determined target scanning position.
The region to be scanned is illustratively scanned according to the determined start and end coordinates of the target scan location. I.e. reaching the start coordinate x at the scanning bed 2 When the line is started to be paid off so as to scan the object to be scanned; at termination coordinate y 2 And stopping paying out to finish the scanning operation of the object to be scanned. By controlling the scanning process, the scanning range covers the area to be scanned of the object to be scanned, and meanwhile, the paying-off quantity can be reduced as much as possible, and the unnecessary dose intake of the object to be scanned is reduced.
Taking a CT apparatus for scanning a heart with a scanning range of 120mm as an example, the following description will be given. If the scanning parameters in the adopted scanning protocol are: the collimation width is 40mm, the pitch is 0.218mm, and the scanning visual field diameter is 250mm; the distance between the center of the bulb and the reference isocenter in the CT equipment is 570mm, then:
the determined bed inlet amount is as follows: 0.218×40=8.72 mm;
the scan offset is: 40/2× (570-250/2)/570=15.61 mm;
the scanning advance is as follows: 8.72-15.61= -6.89mm;
the actual scan length is: 120-6.89×2= 106.22mm.
It follows that the actual scan length is significantly reduced from the corresponding 120mm of the heart organ, thereby greatly reducing the radiation dose.
According to the embodiment of the application, the scanning parameters and the machine parameters of the CT equipment are obtained, the scanning position during scanning is determined according to the scanning parameters, the machine parameters and the area to be scanned, and the area to be scanned is scanned according to the determined scanning position. According to the technical scheme, the scanning position is determined based on the acquired scanning parameters and the machine parameters, so that the radiation dose when CT scanning is performed on the object to be scanned is reduced when the scanning is performed based on the determined scanning position, the influence on the health of the object to be scanned is reduced, and the utilization rate of medical resources is improved.
Example two
Fig. 2 is a block diagram of a scan control device in a second embodiment of the present application, which is applicable to a case of CT scanning an area to be scanned of an object to be scanned by a CT apparatus. The device is realized by software and/or hardware and is specifically configured in a data processing system of the CT equipment.
A scan control device as shown in fig. 2, comprising: a parameter acquisition module 210, a scanning position determination module 220, and a scanning module 230. Wherein,,
a parameter acquisition module 210, configured to acquire scan parameters and machine parameters of the CT apparatus;
a scan position determining module 220, configured to determine a scan position when scanning according to the scan parameter, the machine parameter, and a region to be scanned;
and the scanning module 230 is configured to scan the area to be scanned according to the determined scanning position.
According to the embodiment of the application, the scanning parameters and the machine parameters of the CT equipment are acquired through the parameter acquisition module; the scanning position during scanning is determined by the parameter acquisition module according to the scanning parameters, the machine parameters and the area to be scanned, and the area to be scanned is scanned by the scanning module according to the determined scanning position. According to the technical scheme, the scanning position is determined based on the acquired scanning parameters and the machine parameters, so that the radiation dose when CT scanning is performed on the object to be scanned is reduced when the scanning is performed based on the determined scanning position, the influence on the health of the object to be scanned is reduced, and the utilization rate of medical resources is improved.
Further, the scanning parameters comprise a screw pitch, a collimation width and a radius of a scanning visual field corresponding to the area to be scanned; the machine parameters include positional information of the focal point of the bulb.
Further, the scan position determining module 220 includes:
the feeding amount determining unit is used for determining feeding amount when the scanning bed moves according to the screw pitch;
the scanning offset determining unit is used for determining the scanning offset according to the collimation width, the radius of the scanning visual field and the position information of the bulb tube focus;
and the target scanning position determining unit is used for determining a target scanning position according to the feeding amount, the difference value of the scanning offset and the original scanning position corresponding to the area to be scanned.
Further, the target scanning position determining unit is specifically configured to:
determining a scanning advance according to the difference value of the feeding amount and the scanning offset;
determining the initial coordinate of the target scanning position according to the difference value between the initial coordinate of the original scanning position and the scanning advance;
and determining the termination coordinate of the target scanning position according to the difference value between the termination coordinate of the original scanning position and the scanning lead.
Further, the position information of the bulb focus is a distance between the bulb focus and a reference isocenter position.
The scanning control device can execute the scanning control method provided by any embodiment of the application, and has the corresponding functional modules and beneficial effects of executing the scanning control method.
Example III
Fig. 3 is a block diagram of a CT apparatus according to a third embodiment of the present application, the apparatus including: input device 310, processor 320, and storage device 330.
Wherein, the input device 310 is used for acquiring the scanning parameters and the machine parameters of the CT equipment;
one or more processors 320;
In fig. 3, for example, a processor 320 is shown, the input device 310 in the CT apparatus may be connected to the processor 320 and the storage device 330 by a bus or other means, and the processor 320 and the storage device 330 are also connected by a bus or other means, for example, in fig. 3.
In this embodiment, the processor 320 in the CT apparatus may control the input device 310 to acquire the scan parameters and the machine parameters of the CT apparatus; the scanning position during scanning can be determined according to the scanning parameters, the machine parameters and the area to be scanned; the area to be scanned can be scanned according to the determined scanning position.
The storage 330 in the CT apparatus is used as a computer readable storage medium, and may be used to store one or more programs, which may be software programs, computer executable programs, and modules, such as program instructions/modules (e.g., the parameter acquisition module 210, the scan position determination module 220, and the scan module 230 shown in fig. 2) corresponding to the scan control method in the embodiment of the present application. The processor 320 executes various functional applications of the CT apparatus and data processing, i.e., implements the scan control method in the above-described method embodiment, by running software programs, instructions, and modules stored in the storage 330.
Example IV
A fourth embodiment of the present application further provides a computer readable storage medium having stored thereon a computer program which, when executed by a scan control apparatus, implements a scan control method provided by the implementation of the present application, the method including: acquiring scanning parameters and machine parameters of CT equipment; determining a scanning position when scanning according to the scanning parameters, the machine parameters and the area to be scanned; and scanning the area to be scanned according to the determined scanning position.
From the above description of embodiments, it will be clear to a person skilled in the art that the present application may be implemented by means of software and necessary general purpose hardware, but of course also by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a FLASH Memory (FLASH), a hard disk, or an optical disk of a computer, where the instructions include a number of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the method described in the embodiments of the present application.
Note that the above is only a preferred embodiment of the present application and the technical principle applied. Those skilled in the art will appreciate that the present application is not limited to the particular embodiments described herein, but is capable of numerous obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the present application. Therefore, while the present application has been described in connection with the above embodiments, the present application is not limited to the above embodiments, but may include many other equivalent embodiments without departing from the spirit of the present application, the scope of which is defined by the scope of the appended claims.
Claims (6)
1. A scan control method, comprising:
acquiring scanning parameters and machine parameters of CT equipment;
the scanning parameters comprise a screw pitch, a collimation width and a radius of a scanning visual field corresponding to the area to be scanned; the machine parameters comprise position information of a bulb focus;
determining a scanning position when scanning according to the scanning parameters, the machine parameters and the area to be scanned;
the determining a scanning position when scanning according to the scanning parameters, the machine parameters and the area to be scanned comprises the following steps:
according to the screw pitch, determining the feeding amount of the scanning bed when moving; determining a scanning offset according to the collimation width, the radius of the scanning visual field and the position information of the bulb tube focus;
the scan offset is determined according to the following formula:
wherein l 0 The scanning offset is C, S is the distance between the center of the bulb tube and the reference isocenter, and R is the radius of the scanning visual field;
determining a target scanning position according to the feeding amount, the difference value of the scanning offset and the original scanning position corresponding to the area to be scanned;
and scanning the area to be scanned according to the determined scanning position.
2. The method of claim 1, wherein determining a target scan position based on the amount of incoming bed, the difference in the scan offset, and the original scan position corresponding to the region to be scanned, comprises:
determining a scanning advance according to the difference value of the feeding amount and the scanning offset;
determining the initial coordinate of the target scanning position according to the difference value between the initial coordinate of the original scanning position and the scanning advance;
determining the termination coordinate of the target scanning position according to the difference value between the termination coordinate of the original scanning position and the scanning lead;
correspondingly, scanning the area to be scanned according to the determined scanning position comprises the following steps:
and scanning the area to be scanned according to the determined starting coordinate and ending coordinate of the target scanning position.
3. The method according to any of claims 1-2, wherein the position information of the bulb focus is a distance between the bulb focus and a reference isocenter position.
4. A scan control apparatus, comprising:
the parameter acquisition module is used for acquiring scanning parameters and machine parameters of the CT equipment;
the scanning parameters comprise a screw pitch, a collimation width and a radius of a scanning visual field corresponding to the area to be scanned; the machine parameters comprise position information of a bulb focus;
the scanning position determining module is used for determining the scanning position when scanning according to the scanning parameters, the machine parameters and the area to be scanned;
the scanning position determining module includes:
the feeding amount determining unit is used for determining feeding amount when the scanning bed moves according to the screw pitch;
the scanning offset determining unit is used for determining the scanning offset according to the collimation width, the radius of the scanning visual field and the position information of the bulb tube focus;
the scan offset is determined according to the following formula:
wherein l 0 The scanning offset is C, S is the distance between the center of the bulb tube and the reference isocenter, and R is the radius of the scanning visual field;
a target scanning position determining unit, configured to determine a target scanning position according to the feeding amount, the difference value of the scanning offset, and an original scanning position corresponding to the region to be scanned;
and the scanning module is used for scanning the area to be scanned according to the determined scanning position.
5. A CT apparatus, comprising:
one or more processors;
a memory for storing one or more programs;
when executed by the one or more processors, causes the one or more processors to implement a scan control method as claimed in any one of claims 1 to 3.
6. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements a scanning control method as claimed in any one of claims 1-3.
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| EP1439566A1 (en) * | 2003-01-17 | 2004-07-21 | ICT, Integrated Circuit Testing Gesellschaft für Halbleiterprüftechnik Mbh | Charged particle beam apparatus and method for operating the same |
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