CN110693512A - 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, which relate to the technical field of medical equipment, and the method specifically comprises the following steps: acquiring scanning parameters and machine parameters of CT equipment; determining a scanning position during 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 of the embodiment of the application, the scanning position is determined based on the acquired scanning parameters and the machine parameters, so that when scanning is performed based on the determined scanning position, the radiation dose of an object to be scanned during CT scanning is reduced, 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) apparatuses include three modes, i.e., plain film, axial scan, and helical scan. In order to effectively acquire scan data of a region of interest during helical scanning, a reconstruction range is usually set according to the region of interest, and a certain amount of scan start position is set in front of the reconstruction range.
However, the radiation dose of the object to be scanned during CT scanning is increased by adopting the above method, which not only brings certain influence to the health of the object to be scanned, but also causes medical resource waste and reduces the utilization rate of medical resources.
Disclosure of Invention
The application provides a scanning control method, a scanning control device, scanning control equipment and a storage medium, which are used for reducing the radiation dose when CT scanning is carried out on an object to be scanned, reducing the health influence on the object to be scanned and simultaneously improving the utilization rate of medical resources.
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 during 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 screw pitch, a collimation width, and a radius of a scanning field corresponding to the region to be scanned; the machine parameters include position information of the bulb focus.
Optionally, determining a scanning position when scanning is performed according to the scanning parameter, the machine parameter, and the region to be scanned, including:
determining the bed entering amount when the scanning bed moves according to the screw pitch;
determining scanning offset according to the collimation width, the radius of the scanning visual field and the position information of the bulb focus;
and determining a target scanning position according to the bed entering amount, the difference value of the scanning offset and the original scanning position corresponding to the area to be scanned.
Optionally, determining a target scanning position according to the bed entering amount, the difference between the scanning offset amounts, and the original scanning position corresponding to the region to be scanned, includes:
determining a scanning advance according to the difference value of the bed entering 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 end coordinate of the target scanning position according to the difference value between the end coordinate of the original scanning position and the scanning advance;
correspondingly, scanning the region to be scanned according to the determined scanning position includes:
and scanning the area to be scanned according to the determined starting coordinate and the determined ending coordinate of the target scanning position.
Optionally, the position information of the focus of the bulb tube is a distance between the focus of the bulb tube and the reference isocenter position.
In a second aspect, an embodiment of the present application further provides a scan control apparatus, 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 a scanning position during 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, an embodiment of the present application further provides a CT apparatus, including:
one or more processors;
a memory for storing one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement a scan control method as provided in an embodiment of the first aspect.
In a fourth aspect, the present application further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements a scan control method as provided in the embodiments of the first aspect.
According to the embodiment of the application, the scanning position during scanning is determined by acquiring the scanning parameters and the machine parameters of the CT equipment according to the scanning parameters, the machine parameters and the region to be scanned, and the region 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 when scanning is performed based on the determined scanning position, the radiation dose of an object to be scanned during CT scanning is reduced, 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 flowchart of a scan control method according to one embodiment of the present application;
fig. 1B is a schematic diagram of a scanning position determining process in one embodiment of the present application;
fig. 2 is a structural diagram of a scanning control apparatus in a second embodiment of the present application;
fig. 3 is a structural diagram of a CT apparatus according to a third embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures.
Example one
Fig. 1A is a flowchart of a scanning control method in a first application embodiment, which is applicable to a case where CT scanning is performed on a to-be-scanned region 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:
and S110, acquiring scanning parameters and machine parameters of the CT equipment.
The scan parameters may be preset in the CT device before scanning, and the scan parameters may be set before using the CT device, and generally, 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 corresponding to the region to be scanned.
Wherein, the pitch is used for measuring the moving speed of the scanning bed in the scanning process and is the ratio of the bed 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 a collimator and is used for limiting the width of a ray bundle; a scan Field Of View (FOV) corresponding to the region to be scanned is used to define a reconstruction range Of the region to be scanned.
The machine parameters are related to the physical structure of the CT equipment and are used for representing the position relation between different hardware in the CT equipment. Illustratively, the machine parameters of the CT apparatus include position information of the focus of the bulb, such as a distance S between the center of the bulb and a reference isocenter, and a distance S between the center of the bulb and a detector1And the distance S between the detector and the reference isocenter2And the like.
And S120, determining a scanning position during 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 a to-be-scanned area corresponding to the to-be-scanned area is scanned.
For example, according to the scanning parameters, the machine parameters and the area to be scanned, the scanning position when scanning is performed is determined, which may be: determining the bed entering amount when the scanning bed moves according to the screw pitch; determining scanning offset according to the collimation width, the radius of the scanning visual field and the position information of the bulb focus; and determining a target scanning position according to the bed entering amount, the difference value of the scanning offset and the original scanning position corresponding to the area to be scanned.
Specifically, the bed entering amount of the moving scanning bed is determined according to the following formula:
l1＝p×C；
wherein l1The bed entering amount is; p is the pitch; and C is the quasi-straight width.
Specifically, the scan offset is determined according to the following formula:
wherein l0For the scan offset, S is the distance between the center of the bulb and the reference isocenter, S1The distance between the center of the bulb and the detector, and the distance S between the detector and the reference isocenter2。
Exemplarily, the determining the target scanning position according to the bed entering amount, the difference of the scanning offset amount, and the original scanning position corresponding to the region to be scanned may be: determining a scanning advance according to the difference value of the bed entering 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 end coordinate of the target scanning position according to the difference value between the end coordinate of the original scanning position and the scanning advance.
Specifically, the scan advance Δ l is determined according to the following formula:
Δl＝l1-l0；
the start and end coordinates of the target scan location are determined according to the following formulas, respectively:
wherein the initial coordinate of the original scanning position is x1With a termination coordinate of y1(ii) a The starting coordinate of the target scanning position is x2With a termination coordinate of y2。
The forward direction of the original scanning position and the target scanning position is the forward direction z of the scanning bed.
S130, scanning the area to be scanned according to the determined target scanning position.
Illustratively, the area to be scanned is scanned according to the determined start coordinate and the determined end coordinate of the target scanning position. I.e. at the scanning bed reaching the start coordinate x2When the scanning operation is carried out, the object to be scanned is placed in a line; at the end coordinate y2When the line is stopped to end the object to be scannedAnd (4) scanning operation. Through the control of the scanning process, the number of the paying-off wires can be reduced as much as possible while the scanning range covers the to-be-scanned area of the to-be-scanned object, and the intake of unnecessary dose of the to-be-scanned object is reduced.
The description will be given by taking the example of scanning the heart with 120mm scanning range by using a CT apparatus. If the scanning parameters in the adopted scanning protocol are as follows: the collimation width is 40mm, the screw pitch is 0.218mm and the scanning field diameter is 250 mm; the distance between the center of the bulb and the reference isocenter in the CT device is 570mm, then:
the determined bed entering 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 lead is: 8.72-15.61 ═ -6.89 mm;
the actual scan length is: 120-6.89X 2 ═ 106.22 mm.
Therefore, the actual scanning length is obviously reduced compared with the corresponding 120mm of the heart organ, thereby greatly reducing the radiation dose.
According to the embodiment of the application, the scanning position during scanning is determined by acquiring the scanning parameters and the machine parameters of the CT equipment according to the scanning parameters, the machine parameters and the region to be scanned, and the region 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 when scanning is performed based on the determined scanning position, the radiation dose of an object to be scanned during CT scanning is reduced, 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 structural diagram of a scanning control apparatus in a second embodiment of the present application, which is applicable to a case where CT scanning is performed on a region to be scanned of an object to be scanned by a CT device. 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 apparatus as shown in fig. 2, comprising: a parameter acquisition module 210, a scan position determination module 220, and a scan module 230. Wherein,
a parameter obtaining module 210, configured to obtain scanning parameters and machine parameters of the CT apparatus;
a scanning position determining module 220, configured to determine a scanning position when scanning is performed according to the scanning parameter, the machine parameter, and the region to be scanned;
a scanning module 230, configured to scan the region 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 obtained through the parameter obtaining module; and determining a scanning position during scanning according to the scanning parameters, the machine parameters and the area to be scanned by the parameter acquisition module, and scanning the area to be 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 when scanning is performed based on the determined scanning position, the radiation dose of an object to be scanned during CT scanning is reduced, 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 region to be scanned; the machine parameters include position information of the bulb focus.
Further, the scan position determining module 220 includes:
the bed entering amount determining unit is used for determining the bed entering 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 focus;
and the target scanning position determining unit is used for determining a target scanning position according to the bed entering 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 bed entering 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 end coordinate of the target scanning position according to the difference value between the end coordinate of the original scanning position and the scanning advance.
Further, the position information of the bulb focus is the distance between the bulb focus and the 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 structural diagram of a CT apparatus in a third embodiment of the present application, where the CT apparatus includes: an input device 310, a processor 320, and a storage device 330.
The input device 310 is used for acquiring scanning parameters and machine parameters of the CT apparatus;
one or more processors 320;
In fig. 3, a processor 320 is taken as an example, 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, which is taken as an example in fig. 3.
In this embodiment, the processor 320 in the CT apparatus may control the input device 310 to obtain 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 also be scanned according to the determined scanning position.
The storage device 330 in the CT apparatus, as a computer-readable storage medium, can be used to store one or more programs, which may be software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the scan control method in the embodiment of the present application (for example, the parameter acquiring module 210, the scan position determining module 220, and the scan module 230 shown in fig. 2). The processor 320 executes various functional applications and data processing of the CT apparatus by executing software programs, instructions and modules stored in the storage device 330, that is, implements the scan control method in the above-described method embodiment.
The storage device 330 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data and the like (such as scanning parameters, machine parameters, and scanning positions in the above-described embodiments). Further, the storage 330 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, storage 330 may further include memory located remotely from processor 320, which may be connected to a server over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
Example four
A fourth embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a scan control apparatus, implements a scan control method provided in the embodiments of the present application, and the method includes: acquiring scanning parameters and machine parameters of CT equipment; determining a scanning position during 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 the embodiments, it is obvious for those skilled in the art that the present application can be implemented by software and necessary general hardware, and certainly can be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present application may be embodied 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 (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods described in the embodiments of the present application.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present application and the technical principles employed. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the application. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application, and the scope of the present application is determined by the scope of the appended claims.
Claims (10)
1. A scan control method, comprising:
acquiring scanning parameters and machine parameters of CT equipment;
determining a scanning position during 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.
2. The method of claim 1, wherein the scan parameters include a pitch, a collimation width, and a radius of a scan field corresponding to the region to be scanned; the machine parameters include position information of the bulb focus.
3. The method of claim 2, wherein determining a scanning position when scanning according to the scanning parameters, the machine parameters and the area to be scanned comprises:
determining the bed entering amount when the scanning bed moves according to the screw pitch;
determining scanning offset according to the collimation width, the radius of the scanning visual field and the position information of the bulb focus;
and determining a target scanning position according to the bed entering amount, the difference value of the scanning offset and the original scanning position corresponding to the area to be scanned.
4. The method of claim 3, wherein determining a target scanning position according to the bed entering amount, the difference of the scanning offset amount and an original scanning position corresponding to the region to be scanned comprises:
determining a scanning advance according to the difference value of the bed entering 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 end coordinate of the target scanning position according to the difference value between the end coordinate of the original scanning position and the scanning advance;
correspondingly, scanning the region to be scanned according to the determined scanning position includes:
and scanning the area to be scanned according to the determined starting coordinate and the determined ending coordinate of the target scanning position.
5. The method of any of claims 2-4, wherein the position information of the bulb focus is a distance between the bulb focus and a reference isocenter position.
6. A scan control apparatus, comprising:
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 a scanning position during 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.
7. The apparatus of claim 6, wherein the scan parameters include a pitch, a collimation width, and a radius of a scan field corresponding to the region to be scanned; the machine parameters include position information of the bulb focus.
8. The apparatus of claim 7, wherein the scan position determination module comprises:
the bed entering amount determining unit is used for determining the bed entering 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 focus;
and the target scanning position determining unit is used for determining a target scanning position according to the bed entering amount, the difference value of the scanning offset and the original scanning position corresponding to the area to be scanned.
9. A CT apparatus, comprising:
one or more processors;
a memory for storing 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 recited in any one of claims 1-5.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a scan control method according to any one of claims 1 to 5.
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