CN108095751B - CT perfusion scanning method, system and storage medium - Google Patents
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Abstract
The invention relates to a CT perfusion scanning method, a system and a storage medium, comprising the steps of obtaining the scanning length of a part to be scanned; determining a perfusion scanning mode according to the scanning length of the part to be scanned and a preset scanning length, wherein the perfusion scanning mode comprises static perfusion scanning and dynamic perfusion scanning; setting the scanning times and the scanning interval time of the part to be scanned in the determined perfusion scanning mode; and performing perfusion scanning on the part to be scanned according to the determined scanning times and scanning interval time, so that the condition that the scanning interval time selected manually by a user is larger or smaller can be avoided, the set time interval for continuously scanning the same part, namely the scanning interval time, is more accurate, the times for continuously scanning the same part can be reduced as much as possible on the premise of ensuring that the image of CT perfusion scanning is clear, the amount of contrast agent absorbed by a patient is reduced, and further, the harm to the patient is reduced.
Description
Technical Field
The present invention relates to the field of CT scanning, and in particular, to a CT perfusion scanning method, system and storage medium.
Background
The CT perfusion scan is to obtain the CT values of the interested region on the CT images of a certain floor at different times according to the medical blood flow calculation principle of the trachea, the central volume theorem and the intravascular dilution principle, thereby obtaining a time density curve, and obtaining the perfusion value by the processing of perfusion software for diagnosis.
In general, perfusion scans can be classified into dynamic perfusion scans and static perfusion scans according to whether a part to be scanned moves during the scan. Before scanning, a user can manually select a scanning mode and set a time interval for continuously scanning the same part, but the time interval set manually is not precise generally, and is larger or smaller, so that the working efficiency is reduced.
Disclosure of Invention
Based on this, it is necessary to provide a CT perfusion scanning method and system for the problem of inaccurate time interval for manually setting continuous scanning of the same part.
According to a first aspect of embodiments of the present invention, there is provided a CT perfusion scanning method, comprising the steps of:
acquiring the scanning length of a part to be scanned;
determining a perfusion scanning mode according to the scanning length of the part to be scanned and a preset scanning length, wherein the perfusion scanning mode comprises static perfusion scanning and dynamic perfusion scanning;
setting the scanning times and the scanning interval time of the part to be scanned in the determined perfusion scanning mode;
and performing perfusion scanning on the part to be scanned according to the determined scanning times and scanning interval time.
In one embodiment, the preset scan length is less than or equal to the detector width.
In one embodiment, the step of determining the perfusion scanning mode according to the scanning length of the portion to be scanned and a preset scanning length includes:
and judging whether the scanning length of the part to be scanned is less than or equal to a preset scanning length, if so, performing perfusion scanning in a static perfusion scanning mode, and if not, performing perfusion scanning in a dynamic perfusion scanning mode.
In one embodiment, the setting the number of scans and the scan interval period of the portion to be scanned in the determined perfusion scan mode includes:
and under a static perfusion scanning mode, setting the scanning interval time period according to the scanning length of the part to be scanned.
In one embodiment, the setting the number of scans and the scan interval period of the portion to be scanned in the determined perfusion scan mode includes:
and under a dynamic perfusion scanning mode, judging the size of a scanning interval time period set according to the scanning length of the part to be scanned and the optimal scanning interval time period for scanning the part to be scanned.
In one embodiment, if the scan interval period set according to the scan length of the portion to be scanned is less than or equal to the optimal scan interval period, the optimal scan interval period is set as the scan interval period of the scanning system.
In one embodiment, if the scanning interval time period set according to the scanning length of the portion to be scanned is greater than the optimal scanning interval time period, the user is prompted to select whether to continue to perform perfusion scanning on the portion to be scanned.
In one embodiment, when an instruction of a user to continue perfusion scanning on a part to be scanned is received, a scanning interval time period set according to a scanning length of the part to be scanned is set as a scanning interval time period of a scanning system.
According to a second aspect of embodiments of the present invention, there is provided a CT perfusion scanning system comprising a CT perfusion scanning device including a scanning chamber, and a computer including a memory, a processor, and a computer program stored on the memory and executable on the processor, the program when executed by the processor being operable to perform a CT perfusion scanning method, the method comprising:
acquiring the scanning length of a part to be scanned along the axial direction of a scanning cavity;
automatically determining a perfusion scanning mode according to the scanning length of the part to be scanned and a preset scanning length;
automatically setting scanning parameters of the part to be scanned under the determined perfusion scanning mode, wherein the scanning parameters comprise scanning times or/and scanning interval time;
and according to the determined scanning parameters, performing dynamic perfusion scanning or/and static perfusion scanning on the part to be scanned.
According to a third aspect of embodiments of the present invention, there is provided a computer readable storage medium, having stored thereon a computer program, which, when being executed by a processor, is adapted to carry out the method according to any one of the preceding embodiments.
The CT perfusion scanning method provided by the invention automatically selects a perfusion scanning mode according to the acquired scanning length of the part to be scanned and the preset scanning length, automatically sets the scanning times and the scanning interval time period for scanning the part to be scanned under the determined perfusion scanning mode, and performs perfusion scanning on the part to be scanned according to the determined scanning times and the scanning interval time period, so that the scanning interval time period manually selected by a user is avoided from being larger or smaller, the set time interval for continuously scanning the same part, namely the scanning interval time period, is more accurate, the number of times for continuously scanning the same part can be reduced as much as possible on the premise of ensuring that an image of CT perfusion scanning is clear, the amount of a contrast agent absorbed by a patient is reduced, and further, the injury to the patient is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a flow chart of a CT perfusion scanning method according to an exemplary embodiment of the present invention;
FIG. 2 is a diagram illustrating another CT perfusion scan method in accordance with an exemplary embodiment of the present invention;
fig. 3 is a schematic structural diagram of a CT perfusion scanning system according to an exemplary embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
CT perfusion scanning is a commonly used enhanced scanning method, and generally, CT perfusion scanning can be divided into dynamic perfusion scanning and static perfusion scanning, where dynamic perfusion scanning refers to that a scanning bed can reciprocate along the length direction of the scanning bed in the perfusion scanning process, and swings like a crib back and forth, and a detector fixed on a scanning frame rotates around a scanning part along with the scanning frame, so that the coverage of a CT scanning system, that is, the scanning length along the length direction of the scanning bed, can be increased; static perfusion scanning refers to that in the perfusion scanning process, a scanning bed is static and does not move, and only a detector fixed on a scanning frame rotates around a scanning part along with the scanning frame, so that under the static perfusion scanning, the scanning length supported by a scanning system along the length direction of the scanning bed is smaller than that under the dynamic perfusion scanning.
When CT perfusion scanning is carried out, a perfusion scanning mode and a scanning interval time interval are often manually selected according to a part to be scanned and a scanning length, so that the degree of automation is low, the working efficiency is reduced, and the selected time interval for continuously scanning the same part, namely the scanning interval time interval, is not accurate and is inevitably larger or smaller. If the scanning interval time is larger, the image quality of perfusion scanning cannot meet the requirement, and the image is not clear; if the scanning interval is too small, the number of times of continuously scanning the same part is too large, and the contrast agent absorbed by the patient is more, which causes certain harm to the body of the patient. In order to solve the above problems, the present invention provides a CT perfusion scanning method.
Fig. 1 is a flowchart illustrating a CT perfusion scanning method according to an exemplary embodiment of the present invention, and as shown in fig. 1, the CT perfusion scanning method includes the following steps:
in step 101, a scan length of a portion to be scanned is acquired.
In step 102, a perfusion scanning mode is determined according to the scanning length of the portion to be scanned and a preset scanning length.
In this embodiment, the perfusion scanning mode includes a static perfusion scanning mode and a dynamic perfusion scanning mode, and it may be determined whether the scanning length of the portion to be scanned is less than or equal to a preset scanning length, if so, the static perfusion scanning mode is used for perfusion scanning, and if not, the dynamic perfusion scanning mode is used for perfusion scanning.
In this embodiment, the preset scan length may be less than or equal to the detector width.
In step 103, the number of scans and the scan interval period of the part to be scanned are set in the determined perfusion scan mode.
In this embodiment, in the static perfusion scanning mode, the scanning interval period may be set according to the scanning length of the portion to be scanned.
In the dynamic perfusion scanning mode, the size of the scanning interval time period set according to the scanning length of the part to be scanned and the optimal scanning interval time period for scanning the part to be scanned can be judged. And if the scanning interval time period set according to the scanning length of the part to be scanned is less than or equal to the optimal scanning interval time period, setting the optimal scanning interval time period as the scanning interval time period of a scanning system. And if the scanning interval time period set according to the scanning length of the part to be scanned is greater than the optimal scanning interval time period, prompting a user to select whether to continue to perform perfusion scanning on the part to be scanned. When an instruction of a user to continue perfusion scanning of a part to be scanned is received, setting a scanning interval time period set according to the scanning length of the part to be scanned as a scanning interval time period of a scanning system.
In step 104, according to the determined scanning times and scanning interval time, performing perfusion scanning on the part to be scanned.
The CT perfusion scanning method provided by the invention automatically selects a perfusion scanning mode according to the acquired scanning length of the part to be scanned and the preset scanning length, automatically sets the scanning times and the scanning interval time period for scanning the part to be scanned under the determined perfusion scanning mode, and performs perfusion scanning on the part to be scanned according to the determined scanning times and the scanning interval time period, so that the scanning interval time period manually selected by a user is avoided from being larger or smaller, the set time interval for continuously scanning the same part, namely the scanning interval time period, is more accurate, the number of times for continuously scanning the same part can be reduced as much as possible on the premise of ensuring that an image of CT perfusion scanning is clear, the amount of a contrast agent absorbed by a patient is reduced, and further, the injury to the patient is reduced.
FIG. 2 is a diagram of another CT perfusion scanning method according to an exemplary embodiment of the present invention, including the following steps:
in step 201, a scan length of a portion to be scanned is acquired.
In this embodiment, the user may select the portion to be scanned and the scanning length of the portion to be scanned through a button or a touch screen preset on the scanning system, where the scanning length is the length of the portion to be scanned along the length direction of the scanning bed.
In other embodiments, the scanning system may automatically identify the scanning length of the portion to be scanned according to an image capturing device, which may be a camera, etc., but the present invention is not limited thereto, and any device that can identify the scanning length of the portion to be scanned is within the scope of the present invention.
In step 202, it is determined whether the scan length of the portion to be scanned is less than a preset scan length.
In this embodiment, the preset scan length refers to a maximum scan length that can be supported by the scanning system when the static perfusion scanning mode is adopted, that is, a width of the detector. The predetermined scan length is a threshold value that can be used to distinguish between using the static perfusion scan mode and using the dynamic perfusion scan mode. When the static perfusion scanning is adopted, the scanning bed on which the patient lies cannot move in the perfusion scanning process, but the detector rotates around the scanning part along with the scanning frame, and when the dynamic perfusion scanning is adopted, the scanning bed on which the patient lies can carry the patient to perform periodic reciprocating motion, so that the maximum scanning length supported by the system in the static perfusion scanning mode is smaller than the maximum scanning length supported by the system in the dynamic perfusion scanning mode. Before performing perfusion scanning, a perfusion scanning mode needs to be determined according to the comparison between the scanning length of the part to be scanned and the preset scanning length, and when the scanning length of the part to be scanned is less than or equal to the preset scanning length, a static perfusion scanning mode is adopted, and the following step 203 is performed; otherwise, when the scan length of the portion to be scanned is greater than the preset scan length, the dynamic perfusion scan method is adopted, and the following step 205 is performed.
In step 203, in the static perfusion scanning mode, a scanning interval period is set according to the scanning length of the part to be scanned.
In this embodiment, when the scan length of the to-be-scanned portion is smaller than or equal to the preset scan length in step 202, the scanning system automatically switches the perfusion scan mode to the static perfusion scan.
In this embodiment, the scanning interval period refers to a time interval for continuously scanning the same portion, and if the scanning interval period is selected to be larger, the quality of an image shot by perfusion scanning is poor, so that the image is unclear, and whether a scanned portion is diseased or not cannot be seen from the image; if the scanning interval time interval is selected to be smaller, the scanning times of the scanning part are too many, and accordingly, the patient absorbs more contrast agents, and the contrast agents can cause certain damage to the patient, so that the selection of the proper scanning interval time interval is critical when perfusion scanning is performed. In the prior art, generally, a user manually selects the cyclic scanning time length, and the phenomenon that the selected cyclic scanning time length is larger or smaller is inevitable without precise calculation, and the perfusion scanning method provided by the invention can automatically set the corresponding scanning interval time period and the corresponding scanning times according to the scanning length of the part to be scanned selected in step 201.
In step 204, in the dynamic perfusion scanning mode, the size of the scanning interval period set according to the scanning length of the portion to be scanned and the optimal scanning interval period for scanning the portion to be scanned are determined.
In this embodiment, when the scan length of the to-be-scanned portion is greater than the preset scan length in step 202, the scanning system automatically switches the perfusion scan mode to dynamic perfusion scan.
In this embodiment, in order to ensure both the image quality of the perfusion scan and the minimal absorption of contrast agent by the patient, it is necessary to calculate a suitable scan interval period, and define the scan interval period as the optimal scan interval period. When dynamic perfusion scanning is adopted, the scanning interval time periods supported by the scanning system are different for different scanning lengths; according to the dynamic perfusion principle, the optimal scanning interval time periods corresponding to different scanning parts are different, so that before the dynamic perfusion scanning is performed, whether the scanning interval time period supported by the scanning system under the scanning length of the part to be scanned is smaller than the optimal scanning interval time period corresponding to the part to be scanned needs to be judged in advance.
For example, assuming that it is necessary to check whether a liver of a patient has a lesion, the selected scan length is 150mm, and when the patient is lying on the bed with the head facing the gantry, the selected scan length 150mm is the length of the liver along the length direction of the bed. According to the dynamic perfusion scanning principle, the optimal scanning interval time period corresponding to the liver scanning is 3s, namely, the area to be scanned of the liver with the length of 150mm is scanned once every 3s, and if the scanning interval time period supported by the scanning system when the scanning length is 150mm is 4s, at this time, the scanning interval time period supported by the scanning system cannot reach the optimal scanning interval time period for scanning the part to be scanned of the liver with the length of 150mm, if the perfusion scanning is continued, the obtained image may be unclear, and whether the scanned part has a lesion or not may not be identified.
In step 205, the optimal scan interval period is set to the scan interval period of the scanning system.
In this embodiment, when the scanning interval period set according to the scanning length of the portion to be scanned is less than or equal to the optimal scanning interval period for scanning the portion to be scanned, the optimal scanning interval period may be set as the scanning interval period of the scanning system. For example, assuming that whether a lesion exists in a kidney of a patient needs to be detected, the selected scan length is 100mm, according to the dynamic perfusion scan principle, the optimal scan interval period corresponding to the scan of the kidney is 2s, that is, a region to be scanned of 100mm of the kidney needs to be scanned every 2s, and if the scan interval period supported by the scan system when the scan length is 100mm is 1s, at this time, when the scan system acquires that the region to be scanned is the kidney, the optimal scan interval period 2s for scanning the kidney can be automatically used as the scan interval period of the scan system.
In step 206, the user is prompted to select whether to continue perfusion scanning of the site to be scanned.
In this embodiment, when the scanning interval period set according to the scanning length of the to-be-scanned part is greater than the optimal scanning interval period, the scanning system may not reach the optimal scanning interval period corresponding to the to-be-scanned part, the number of times of scanning the to-be-scanned part is limited within the same scanning time, and the number of times of scanning corresponding to the optimal scanning interval period cannot be reached, which may cause an image obtained by perfusion scanning to be unclear and may not identify whether a scanned part has a lesion.
In other embodiments, the scanning system may also prompt the user to select whether to continue perfusion scan on the portion to be scanned by giving an alarm, lighting or intelligent voice, and the like, which is not limited in this respect, and any embodiment that can prompt the user is within the protection scope of the present invention.
In step 207, a scanning interval period set according to the scanning length of the portion to be scanned is set as a scanning interval period of the scanning system.
When the scanning system receives an instruction of a user to continue perfusion scanning on a part to be scanned, a scanning interval time period set according to the scanning length of the part to be scanned can be set as the scanning interval time period of the scanning system; when the scanning system receives an instruction sent by the user to not continue scanning, or no instruction is received within a preset time, the scanning system can automatically quit the scanning program.
In step 208, a perfusion scan is performed on the portion to be scanned according to the determined number of scans and the scan interval period.
In the present embodiment, for the convenience of description, the static perfusion scan and the dynamic perfusion scan are collectively referred to as a performed perfusion scan, and the static perfusion scan and the dynamic perfusion scan can be distinguished from each other in actual operation.
Corresponding to the CT perfusion scanning method, the present invention further provides a CT perfusion scanning system, which includes a CT perfusion scanning apparatus 400 and a computer 300, wherein the CT perfusion scanning apparatus 400 includes a scanning chamber, and the computer 300 includes a memory, a processor, and a computer program stored in the memory and executable on the processor.
Computer 300 may be used to implement particular methods and apparatus disclosed in some embodiments of the invention. The specific apparatus in this embodiment is illustrated by a functional block diagram of a hardware platform that includes a display module. In some embodiments, computer 300 may implement implementations of some embodiments of the invention by other hardware devices, software programs, firmware, and combinations thereof. In other embodiments, the computer 300 may be a general purpose computer, or a specific purpose computer.
Fig. 3 is a block diagram of a CT perfusion scanning system according to an exemplary embodiment of the present invention, and as shown in fig. 3, a computer 300 may include an internal communication bus 301, a processor 302, a Read Only Memory (ROM)303, a Random Access Memory (RAM)304, a communication port 305, an input/output component 306, a hard disk 307, and a user interface 308. An internal communication bus 301 may enable communication among the components of the computer 300. Processor 302 may make the determination and issue a prompt. In some embodiments, processor 302 may be comprised of one or more processors. The communication port 305 may enable the computer 300 to communicate with other components (not shown), such as: and the external equipment, the image acquisition equipment, the database, the external storage, the image processing workstation and the like are in data communication. In some embodiments, computer 300 may send and receive information and data from a network through communication port 305. Input/output component 306 supports the flow of input/output data between computer 300 and other components. The user interface 308 may enable interaction and information exchange between the computer 300 and a user. The computer 300 also comprises various forms of program storage units and data storage units, such as a hard disk 307, Read Only Memory (ROM)303, Random Access Memory (RAM)304, capable of storing various data files for processing and/or communication by the computer, as well as possible program instructions for execution by the processor 302.
The processor, when executing a program, is operable to perform a method of CT perfusion scanning, the method comprising:
acquiring the scanning length of a part to be scanned along the axial direction of a scanning cavity;
automatically determining a perfusion scanning mode according to the scanning length of the part to be scanned and a preset scanning length;
automatically setting scanning parameters of the part to be scanned under the determined perfusion scanning mode, wherein the scanning parameters comprise scanning times or/and scanning interval time;
and according to the determined scanning parameters, performing dynamic perfusion scanning or/and static perfusion scanning on the part to be scanned.
Embodiments of the present invention provide a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements a CT perfusion scanning method as provided in all embodiments of the present invention. The method comprises the following steps:
acquiring the scanning length of a part to be scanned;
determining a perfusion scanning mode according to the scanning length of the part to be scanned and a preset scanning length, wherein the perfusion scanning mode comprises static perfusion scanning and dynamic perfusion scanning;
setting the scanning times and the scanning interval time of the part to be scanned in the determined perfusion scanning mode;
and performing perfusion scanning on the part to be scanned according to the determined scanning times and scanning interval time.
A computer readable signal medium may include a propagated data signal with computer program code embodied therein, for example, on baseband or as part of a carrier wave. The propagated signal may take many forms, including electromagnetic, optical, and the like. A computer readable signal medium may be any computer readable medium that is not a computer readable signal medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code on a computer readable signal medium may be propagated over any suitable medium, including radio, electrical cable, fiber optic cable, radio frequency signals, or the like, or any combination of the preceding.
Computer program code required for operation of various portions of embodiments of the present invention may be written in any one or more programming languages, including an object oriented programming language such as JAVA, Scala, Smalltalk, Eiffel, JADE, Emerald, C + +, C #, VB,. NET, Python, and the like, and conventional procedural programming languages, such as C, Visual Basic, Fortran 2003, PHP, and the like, or other programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user's computer through any network, such as a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet), or in a cloud computing environment, or as a service using, for example, software.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A CT perfusion scanning method, comprising the steps of:
acquiring the scanning length of a part to be scanned;
automatically determining a perfusion scanning mode according to the scanning length of the part to be scanned and a preset scanning length, wherein the perfusion scanning mode comprises static perfusion scanning and dynamic perfusion scanning; the static perfusion scanning means that in the perfusion scanning process, a scanning bed is static and does not move, and a detector fixed on a scanning frame rotates around a scanning part along with the scanning frame; the dynamic perfusion scanning means that in the perfusion scanning process, the scanning bed can reciprocate along the length direction of the scanning bed, and the detector fixed on the scanning frame rotates around the scanning part along with the scanning frame;
setting the scanning times and the scanning interval time of the part to be scanned in the determined perfusion scanning mode;
and performing perfusion scanning on the part to be scanned according to the determined scanning times and scanning interval time.
2. The CT perfusion scanning method of claim 1, wherein the preset scan length is less than or equal to a detector width.
3. The CT perfusion scanning method according to claim 1, wherein the step of automatically determining the perfusion scanning mode according to the scanning length of the portion to be scanned and a preset scanning length comprises:
and judging whether the scanning length of the part to be scanned is less than or equal to a preset scanning length, if so, performing perfusion scanning in a static perfusion scanning mode, and if not, performing perfusion scanning in a dynamic perfusion scanning mode.
4. The CT perfusion scanning method according to claim 1, wherein the setting of the number of scans and the scan interval period of the to-be-scanned part in the determined perfusion scanning mode includes:
and under a static perfusion scanning mode, setting the scanning interval time period according to the scanning length of the part to be scanned.
5. The CT perfusion scanning method according to claim 1, wherein the setting of the number of scans and the scan interval period of the to-be-scanned part in the determined perfusion scanning mode includes:
and under a dynamic perfusion scanning mode, judging the size of a scanning interval time period set according to the scanning length of the part to be scanned and the optimal scanning interval time period for scanning the part to be scanned.
6. The CT perfusion scanning method of claim 5, wherein if a scan interval period set according to a scan length of the portion to be scanned is less than or equal to the optimal scan interval period, the optimal scan interval period is set as a scan interval period of a scanning system.
7. The CT perfusion scanning method of claim 5, wherein if the scan interval period set according to the scan length of the portion to be scanned is greater than the optimal scan interval period, the user is prompted to select whether to continue perfusion scanning the portion to be scanned.
8. The CT perfusion scanning method according to claim 7, wherein when receiving an instruction from a user to continue perfusion scanning on the part to be scanned, the scan interval period set according to the scan length of the part to be scanned is set as the scan interval period of the scanning system.
9. A CT perfusion scanning system comprising a CT perfusion scanning device including a scanning chamber and a computer including a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the program, when executed by the processor, is operable to perform a CT perfusion scanning method, the method comprising:
acquiring the scanning length of a part to be scanned along the axial direction of a scanning cavity;
automatically determining a perfusion scanning mode according to the scanning length of the part to be scanned and a preset scanning length, wherein the perfusion scanning mode comprises static perfusion scanning and dynamic perfusion scanning; the static perfusion scanning means that in the perfusion scanning process, a scanning bed is static and does not move, and a detector fixed on a scanning frame rotates around a scanning part along with the scanning frame; the dynamic perfusion scanning means that in the perfusion scanning process, the scanning bed can reciprocate along the length direction of the scanning bed, and the detector fixed on the scanning frame rotates around the scanning part along with the scanning frame;
setting the scanning times and the scanning interval time of the part to be scanned in the determined perfusion scanning mode;
and performing perfusion scanning on the part to be scanned according to the determined scanning times and scanning interval time.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, is adapted to carry out the method of any one of claims 1 to 8.
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