CN101305921B - Method and device for implement CT respiration gate control - Google Patents
Method and device for implement CT respiration gate control Download PDFInfo
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- CN101305921B CN101305921B CN2007101075128A CN200710107512A CN101305921B CN 101305921 B CN101305921 B CN 101305921B CN 2007101075128 A CN2007101075128 A CN 2007101075128A CN 200710107512 A CN200710107512 A CN 200710107512A CN 101305921 B CN101305921 B CN 101305921B
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Abstract
The invention discloses a method and a device for realizing CT respiration gating, which act CT scan and control a respiration monitoring RTM device to acquire a respiration signal, lead in the respiration signal of the CT respiration gating from the RTM device after the CT scan, transform the respiration signal into reconstruction information by utilizing the corresponding relation between the preset reconstruction information in a CT device and different respiration signals, and utilize the obtained reconstruction information to act the subsequent reconstruction on scanned images. The CT device in the invention supports different RTM devices and the same CT device also supports a new RPM device in the same way after the RPM device is updated; so that the compatibility of a CT system to the RPM device is increased, the CT device and the RPM device are led to work in a loose-coupling manner, thereby greatly lowering the cost input of a user of the CT device, saving the resource, and providing the effective means for integrating the prior gating device in a medical institution.
Description
Technical field
The present invention relates to computerized axial tomography (CT, Computed Tomography) respiratory gating technology, particularly relate to method and the device of a kind of CT of realization respiration gate control (Respiratory Gate).
Background technology
Patient's respiratory movement meeting produces significantly influence to the definition of CT imaging, adopts respiratory gating technology to overcome this problem usually in clinical.When adopting respiratory gating technology, need to use respiration monitoring control equipment (RPM, Respiratory PercentMinute) breath signal is gathered, generate the respiratory rhythm curve, the time that the respiratory rhythm curve controlled CT scan that utilize to obtain again begins and finishes, and in a breathing cycle, carry out the scanning and the data acquisition of a plurality of sampled points, thereby reach the target of respiration gate control.
At present, respiration monitoring control equipment RPM equipment does not have standardization, and the breath signal that it is exported also might be a phase signal except amplitude signal, maybe can reflect other parameter signal of the period of motion of lung.In order to realize respiration gate control, general CT needs and RPM equipment inner integrated or that appointment provides carries out work under tightly coupled state.That is to say that for a CT, it only supports a kind of RPM equipment of output type, if change the RPM equipment of another kind of output type, this CT then can not discern the output signal of the RPM equipment after the replacing.The close coupling of CT and RPM equipment has reduced CT to the RPM compatibility of apparatus, has limited the integration of existing medical resource, uses the cost input of discussing thereby increased CT, has also increased the unnecessary wasting of resources.
Summary of the invention
The object of the present invention is to provide a kind of method and device of the CT of realization respiration gate control, can improve the CT system, make CT and RPM equipment carry out work, reduce use cost, economize on resources in the mode of loose coupling to the RPM compatibility of apparatus.
The objective of the invention is to be achieved through the following technical solutions:
A kind of method that realizes computer tomography device CT respiration gate control, this method may further comprise the steps:
In described CT device, set in advance the corresponding relation of breath signal and reconstruction information;
Start the CT device and scan, control breathing watch-dog RPM gathers breath signal simultaneously;
Described CT device imports described breath signal from described RPM equipment, according to described corresponding relation the breath signal of described importing is changed, and obtains reconstruction information, and utilizes the reconstruction information of described acquisition that the CT scan image is carried out the later stage reconstruction.
According to a preferred embodiment of the present invention, the breath signal of described importing is stored in the RPM file, and the described method that the breath signal that imports is changed is:
The RPM file of described importing is converted into the form that unified CT device is supported, will the breath signal in the RPM file of described CT device support be converted to reconstruction information according to the corresponding relation of described breath signal and reconstruction information again.
According to a further advantageous embodiment of the invention, the breath signal of described importing is stored in the RPM file, and the described method that the breath signal that imports is changed is:
The RPM file of corresponding different-format according to the corresponding relation of its breath signal and reconstruction information, directly is converted to reconstruction information with the breath signal in the RPM file that imports respectively.
Also comprise before the described step of the inventive method: by the respiration gate control mode configuration interface that sets in advance described respiration gate control mode being set is mode of extension.
In addition, described control RPM equipment is gathered breath signal and is comprised: after described CT device exposure starts, trigger described RPM equipment and begin to gather described breath signal, when described CT device end exposure, notify described RPM equipment to stop to gather described breath signal.
The invention allows for a kind of device of realizing computer tomography CT respiration gate control, this device comprises:
Control module is used to control the CT scan module, controls RPM equipment simultaneously and gathers breath signal;
The CT scan module is used for carrying out CT scan under the control of control module, and scanogram is sent to the reconstruction module;
Interface module is used to connect device and the RPM equipment of realizing the CT respiration gate control;
Parsing module, wherein be provided with the corresponding relation of reconstruction information and different breath signals, after finishing CT scan and from described RPM equipment, reading breath signal, utilize the corresponding relation of described setting, the breath signal that receives is changed, obtain reconstruction information, and the reconstruction information that obtains is sent to the reconstruction module;
Rebuild module, be used to utilize the reconstruction information that receives, scanogram is carried out the later stage rebuild.
Wherein, described control module notifies described CT scan module to carry out CT scan, begins to gather breath signal via described interface module notice RPM equipment simultaneously; After CT finishes scanning, receive end scanning notice from described CT scan module, and the notice parsing module, gather breath signal via interface module notice RPM device end simultaneously.
According to a preferred embodiment of the present invention, described breath signal is stored in the RPM file, and described parsing module comprises: format conversion module and reconstruction information modular converter;
Described format conversion module is in the end scanning notice that receives from control module, and after from described RPM equipment, reading breath signal via interface module, the RPM file that reads is converted into the form that unified CT supports and sends to the reconstruction information modular converter;
The reconstruction information modular converter is converted to reconstruction information according to described corresponding relation with the breath signal in the RPM file of CT support, and the reconstruction information that obtains is sent to the reconstruction module.
According to a further advantageous embodiment of the invention, described parsing module comprises reconstruction information modular converters different more than;
The described different corresponding dissimilar RPM equipment of reconstruction information modular converter, each reconstruction information modular converter is basis corresponding relation separately respectively, directly the breath signal in the RPM file that imports is converted to reconstruction information, and the reconstruction information that obtains is sent to the reconstruction module.
It is mode of extension that described control module is further used for being provided with CT respiration gate control mode.
In order to improve CT to the RPM compatibility of apparatus, when the present invention selects the respiration gate control extended mode at CT, respiration monitoring control RPM equipment is gathered breath signal in CT scan, CT finish sweep after, import the breath signal of CT respiration gate control from RPM equipment, utilize the corresponding relation that sets in advance reconstruction information and different breath signals among the CT, this breath signal is converted to reconstruction information, and utilize the reconstruction information that obtains that scanogram is carried out the later stage and rebuild.From the invention described above scheme as seen, scheme provided by the invention has improved the CT system to the RPM compatibility of apparatus, make CT and RPM equipment carry out work in the mode of loose coupling, thereby significantly reduced CT and used the cost input of discussing, also saved resource, provide effective means for integrating the existing door control devices of medical institutions.
Description of drawings
To make clearer above-mentioned and other feature and advantage of the present invention of those of ordinary skill in the art by describing the preferred embodiments of the present invention in detail below with reference to accompanying drawing, in the accompanying drawing:
Fig. 1 is the flow chart that the present invention realizes the method for CT respiration gate control;
Fig. 2 is the composition structural representation of the present invention's device of realizing the CT gate;
Fig. 3 a is a respiration gate control mode configuration interface sketch map of the present invention;
Fig. 3 b is that the present invention breathes scanning interface sketch map;
Fig. 3 c is a respiration gate control of the present invention interface sketch map;
Fig. 4 a is the sketch map that the present invention realizes the composition structure embodiment one of parsing module in the device of CT gate;
Fig. 4 b is the sketch map that the present invention realizes the composition structure embodiment two of parsing module in the device of CT gate.
The specific embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In order to improve CT to the RPM compatibility of apparatus, when the present invention selects the respiration gate control extended mode at CT, the breath signal of CT respiration gate control will be finished the scanning back at CT and import from RPM equipment, and utilize the corresponding relation that sets in advance reconstruction information and different breath signals among the CT, this breath signal is converted to reconstruction information, utilizes the reconstruction information that obtains that scanogram is carried out the later stage and rebuild.
The present invention will be described in detail below by a specific embodiment.
Fig. 1 is the flow chart that the present invention realizes the method for CT respiration gate control, and as shown in Figure 1, the inventive method may further comprise the steps:
Step 100: setting in advance the respiration gate control mode is mode of extension.
The user can perhaps adopt CT to have the respiration gate control mode now by being provided with to determine that the respiration gate control mode adopts mode of extension.The user can show by the respiration gate control mode configuration interface of the present invention shown in Fig. 3 a and is provided with, and chooses " Open Interface " option, and then the respiration gate control mode adopts mode of extension, and CT possesses the ability of supporting third party PRM equipment.If fixedly set the respiration gate control mode in the CT system is mode of extension, and then this step can be omitted.
This step has also guaranteed that for the mode that the user provides flexible selection CT respiration gate control CT to having the compatibility of respiration gate control mode now, has improved the suitable ability of CT simultaneously.
Step 101: start CT scan, control RPM equipment simultaneously and gather breath signal.
In this step, after the CT exposure started, the standard signaling triggering RPM equipment that is sent by CT began to gather breath signal, and when end exposure, RPM equipment stops the collection to breath signal, and promptly CT and RPM equipment carry out synchronously when scanning begins and finish.Need to prove, in whole C T scanning process, breath signal is not carried out any processing, the breath signal that RPM equipment only collects with the stored in file format of self supporting is such as above-mentioned amplitude signal or phase signal or other parameter signal etc.Fig. 3 b is a breathing scanning provided by the invention interface sketch map.
The breath signal that step 102:CT will import from RPM equipment is converted to reconstruction information, and utilizes the reconstruction information that obtains that scanogram is carried out the later stage and rebuild.
In this step, utilize the reconstruction information that obtains that scanogram is rebuild and belong to state of the art, no longer describe in detail here.Here it is emphasized that: CT obtains the method for reconstruction information according to the importing breath signal.
CT according to importing the method that breath signal obtains reconstruction information is: the corresponding relation that sets in advance reconstruction information and different breath signals in CT, when CT reads from RPM equipment when being used to store the RPM file of breath signal, according to described corresponding relation the breath signal that imports is changed, obtain reconstruction information, and utilize the reconstruction information that obtains that scanogram is carried out the later stage and rebuild, Fig. 3 c is a respiration gate control of the present invention interface sketch map, and the curve shown in Fig. 3 c is exactly the breath signal that CT obtains.
Here, the specific implementation of conversion can have a lot of methods, such as: earlier the RPM file that imports is converted into the form that unified CT supports, the breath signal in the RPM file that CT is supported is converted to reconstruction information again; For another example: the RPM file of corresponding different-format designs different converse routines in advance, adopts program separately directly the breath signal in the RPM file that imports to be converted to reconstruction information or the like.
The method that the CT that provides from this step imports breath signal as seen, owing in CT, setting in advance the corresponding relation of reconstruction information with different breath signals, CT among the present invention supports different RPM equipment, after the RPM renewal of the equipment, same the new RPM equipment of the same support of CT, improved the CT system to the RPM compatibility of apparatus, make CT and RPM equipment carry out work in the mode of loose coupling, thereby significantly reduced CT and used the cost input of discussing, also saved resource, provide effective means for integrating the existing door control devices of medical institutions.
Corresponding method shown in Figure 1, the present invention also provides a kind of device of the CT of realization respiration gate control, and Fig. 2 is the composition structural representation of the present invention's device of realizing the CT gate, and as shown in Figure 2, apparatus of the present invention comprise at least with lower module:
Control module 200: be used for the CT respiration gate control is controlled.Control module 200 at first notifies CT scan module 201 to carry out CT scan, begins to gather breath signal via interface module 202 notice RPM equipment 205 simultaneously; After CT finished scanning, control module 200 received the end scanning notice from CT scan module 201, and notice parsing module 203, finished to gather breath signal via interface module 202 notice RPM equipment 205 simultaneously.
CT scan module 201: be used under the control of control module 200, carrying out CT scan, and scanogram is sent to reconstruction module 204.
Interface module 202: be used to connect device and the RPM equipment 205 of realizing the CT respiration gate control.
Parsing module 203: the corresponding relation that wherein is provided with reconstruction information and different breath signals, in the end scanning notice that receives from control module 200, and after from described RPM equipment 205, reading breath signal via interface module 202, utilize the corresponding relation of described reconstruction information and different breath signals, the breath signal that receives is changed, obtain reconstruction information, and the reconstruction information that obtains is sent to reconstruction module 204.
The specific implementation of described parsing module 203 can be the sketch map of the embodiment one shown in Fig. 4 a, comprising: format conversion module 2031 and reconstruction information modular converter 2032, described breath signal is stored in the RPM file.
Described format conversion module 2031, be used in the end scanning notice that receives from control module 200, and after from described RPM equipment 205, reading breath signal via interface module 202, the RPM file that reads is converted into the form that unified CT supports and sends to reconstruction information modular converter 2032.
Reconstruction information modular converter 2032, the breath signal that is used for the RPM file CT supported according to described corresponding relation is converted to reconstruction information, and the reconstruction information that obtains sent to rebuilds module 204.
The specific implementation of described parsing module 203 also can be the sketch map of the embodiment two shown in Fig. 4 b, comprise: different reconstruction information modular converter more than, as reconstruction information modular converter 1, reconstruction information modular converter 2......, reconstruction information modular converter n.
The described different corresponding dissimilar RPM equipment 205 of reconstruction information modular converter, each reconstruction information modular converter is basis corresponding relation separately respectively, directly with the different RPM file that imports (RPM1 file for example, the RPM2 file, ... the RPMn file) in breath signal be converted to corresponding reconstruction information and (for example the breath signal in the RPM1 file that imports be converted to reconstruction information 1, breath signal in the RPM2 file that imports is converted to reconstruction information 2, ... the breath signal in the RPMn file that imports is converted to reconstruction information n), and the reconstruction information that obtains sent to rebuild module 204.
Rebuild module 204: be used to utilize the reconstruction information that receives, scanogram carried out the later stage rebuild.
Here, can be by the interface of medical worker, according to the current reconstruction information modular converter that should use of the type selecting of RPM equipment by providing in advance.Also can increase by a breath signal identification module, select the current reconstruction information modular converter that should use automatically by the type of distinguishing RPM equipment.
It is mode of extension that described control module is further used for being provided with CT respiration gate control mode.
Described control module 200 is further used for being provided with CT respiration gate control mode and realizes the CT respiration gate control for existing respiration gate control pattern.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a method that realizes the computer tomography device respiration gate control is characterized in that, this method may further comprise the steps:
In described computer tomography device, set in advance the corresponding relation of breath signal and reconstruction information;
Start computer tomography device and scan, the control breathing watch-dog is gathered breath signal simultaneously;
Described computer tomography device imports described breath signal from described respiration monitoring control equipment, according to described corresponding relation the breath signal of described importing is changed, obtain reconstruction information, and utilize described reconstruction information that the computer tomography device scanogram is carried out the later stage and rebuild;
Wherein, described control breathing watch-dog is gathered breath signal and is comprised: after described computer tomography device exposure starts, trigger described respiration monitoring control equipment and begin to gather described breath signal, when described computer tomography device end exposure, notify described respiration monitoring control equipment to stop to gather described breath signal.
2. method according to claim 1 is characterized in that, the breath signal of described importing is stored in the respiration monitoring control device file, and the described method that the breath signal that imports is changed is:
Described respiration monitoring control device file is converted into the form that unified computer tomography device is supported, according to described corresponding relation the breath signal in the respiration monitoring control device file of described computer tomography device support is converted to reconstruction information again.
3. method according to claim 1 is characterized in that, the breath signal of described importing is stored in the respiration monitoring control device file, and the described method that the breath signal that imports is changed is:
The respiration monitoring control device file of corresponding different-format respectively according to described corresponding relation, directly is converted to reconstruction information with the breath signal in the respiration monitoring control device file that imports.
4. method according to claim 1 is characterized in that, also comprise before the described step: by the respiration gate control mode configuration interface that sets in advance described respiration gate control mode being set is mode of extension.
5. a device of realizing the computer tomography device respiration gate control is characterized in that, this device comprises:
Control module (200) is used for Control Computer laminagraph device scan module (201), and the control breathing watch-dog is gathered breath signal simultaneously;
Computer tomography device scan module (201) is used for carrying out computer tomography scanning under the control of described control module (200), and scanogram is sent to reconstruction module (204);
Interface module (202) is used to connect device and the respiration monitoring control equipment of realizing the computer tomography device respiration gate control;
Parsing module (203), be used to preserve the corresponding relation of reconstruction information and different breath signals, after finishing computer tomography scanning and from described respiration monitoring control equipment, reading breath signal, utilize described corresponding relation, the breath signal that receives is changed, obtain reconstruction information, and the reconstruction information that obtains is sent to described reconstruction module (204);
Rebuild module (204), be used to utilize the reconstruction information that receives, scanogram is carried out the later stage rebuild;
Wherein, described control module (200) notifies described computer tomography device scan module (201) to carry out computer tomography scanning, notifies described respiration monitoring control equipment to begin to gather breath signal via described interface module (202) simultaneously; After computer tomography device is finished scanning, described control module (200) receives the end scanning notice from described computer tomography device scan module (201), and notify described parsing module (203), notify described respiration monitoring control device end to gather breath signal via interface module (202) simultaneously.
6. device according to claim 5 is characterized in that, described breath signal is stored in the respiration monitoring control file, and described parsing module (203) comprising: format conversion module (2031) and reconstruction information modular converter (2032);
Described format conversion module (2031) is in the end scanning notice that receives from described control module (200), and after from described respiration monitoring control equipment, reading breath signal via described interface module (202), described respiration monitoring control device file is converted into the form of unified computer tomography device support and sends to described reconstruction information modular converter (2032);
Described reconstruction information modular converter (2032) is converted to reconstruction information according to described corresponding relation with the breath signal in the respiration monitoring control device file of computer tomography device support, and the reconstruction information that obtains is sent to described reconstruction module (204).
7. device according to claim 5 is characterized in that, described parsing module (203) comprises reconstruction information modular converters different more than;
The described different corresponding dissimilar respiration monitoring control equipment of reconstruction information modular converter, each reconstruction information modular converter is basis corresponding relation separately respectively, directly the breath signal in the respiration monitoring control device file is converted to reconstruction information, and the reconstruction information that obtains is sent to described reconstruction module (204).
8. device according to claim 5 is characterized in that, it is mode of extension that described control module (200) is further used for being provided with computer tomography device respiration gate control mode.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101658426B (en) * | 2009-09-11 | 2011-08-31 | 昆明理工大学 | Respiratory gating technology based on characteristic of sensitivity of three-dimensional positron emission (PET) detector |
| KR101089567B1 (en) * | 2010-01-19 | 2011-12-06 | 주식회사 나노포커스레이 | Method of generating respiration gating signals for x-ray micro computed tomography scanner |
| DE102011080733A1 (en) * | 2011-08-10 | 2013-02-14 | Siemens Aktiengesellschaft | Method for phase correlated tomographic image reconstruction from data measured by medical imaging, involves performing phase-correlated iterative image reconstruction which is initialized with non-phase related image volume |
| DE102011083387A1 (en) * | 2011-09-26 | 2013-03-28 | Siemens Aktiengesellschaft | A medical imaging method and a medical imaging system configured to perform the medical imaging procedure |
| CN103845070B (en) * | 2012-12-07 | 2018-08-03 | 上海联影医疗科技有限公司 | PET-CT scanning means and its control method |
| CN117558428B (en) * | 2024-01-12 | 2024-03-22 | 华中科技大学同济医学院附属同济医院 | Imaging optimization method and system for liver MRI |
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