CN104545973B - The CT scan method and device of heart - Google Patents
The CT scan method and device of heart Download PDFInfo
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- CN104545973B CN104545973B CN201410699491.3A CN201410699491A CN104545973B CN 104545973 B CN104545973 B CN 104545973B CN 201410699491 A CN201410699491 A CN 201410699491A CN 104545973 B CN104545973 B CN 104545973B
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Abstract
This application provides a kind of CT scan method and device of heart, methods described includes：The heart information of prescan object to be scanned, to obtain preliminary sweep data；Several initial cardiac images according to the preliminary sweep data reconstruction not same period phase；The optimal phase phase of the object to be scanned is determined according to several described initial cardiac images；Based on the optimal phase, the heart of relatively described object to be scanned is finally scanned.In the embodiment of the present application, the x-ray irradiation dose that patient receives in scanning process can be reduced, risk of the sweep object by more x-ray bombardments is reduced on the premise of cardiac image quality is ensured, also can guarantee that the correctness and validity of diagnosis.
Description
Technical field
The application is related to medical data processing technology field, the CT scan method and device of more particularly to a kind of heart.
Background technology
Heart scanning is being carried out to CT scan object (such as needing the patient that is diagnosed or the user for there are other demands)
When, it is thus necessary to determine that go out phase phase (such as diastole and systole phase) to carry out CT scan.Generally, CT scan use is carried out
Diastole relative phase phase 75% or so, the relative phase phase 30% or so in systole phase.
But inventor has found in research process, due to the scrambling and specificity of heart movement, swept for difference
Object is retouched using single diastole and systole phase, will be unable to reflect exactly the heart movement situation of different scanning object, and
And may be such that cardiac reconstruction image is produced than more serious motion artifacts.And if mutually come using helical scanning whole phases
To data for projection, sweep object can be made to receive more x-ray bombardments again.
The content of the invention
Technical problems to be solved in this application are to provide a kind of CT scan method of heart, to avoid existing skill as far as possible
The phenomenon of the heart movement of different scanning object can not be reflected in art exactly, and reduce generation in cardiac reconstruction image as far as possible
The more serious artifact of ratio, while the X-ray that sweep object receives irradiation can also be reduced.
Present invention also provides a kind of CT scan device of heart, to ensure above method realization in practice and should
With.
In order to solve the above problems, this application discloses a kind of CT scan method of heart, including：
The heart information of prescan object to be scanned, to obtain preliminary sweep data；
Several initial cardiac images according to the preliminary sweep data reconstruction not same period phase；
The optimal phase phase of the object to be scanned is determined according to several described initial cardiac images；
Based on the optimal phase, the heart of relatively described object to be scanned is finally scanned.
Optionally, the heart information of the prescan object to be scanned, to obtain preliminary sweep data, including：
The scanning room phase of the prescan is determined, the scanning room phase at least includes a R -- R interval；
The scan position of the prescan is determined, the scan position includes at least the one of the heart of the object to be scanned
Individual fault plane；
The prescan carried out to the heart of object to be scanned in the scanning room phase is triggered in the scan position.
Optionally, the optimal phase phase of the object to be scanned is determined according to several initial cardiac images reconstructed, including：
The heart area in several described initial cardiac images is chosen respectively；
The absolute value of image difference in the heart area of the adjacent phase phase of each two is determined, to respectively obtain the adjacent phase phase of each two
Between differential image；
The standard deviation of the differential image between the adjacent phase phase of each two is calculated, and motion song is drawn according to the standard deviation
Line；
Two region minimum points in the curve movement are identified as optimal systole phase phase and optimal diastole
Phase.
Optionally, the heart based on relatively described object to be scanned of the optimal phase is finally scanned, including：
The corresponding projection angle range of scan data is mutually determined according to the optimal phase；
Only the heart of the object to be scanned is scanned in the projection angle range.
Optionally, the heart based on relatively described object to be scanned of the optimal phase is finally scanned, including：
Corresponding position of the optimal phase is defined as high milliampere scanning area, and, other positions are defined as low
Milliampere scanning area；
For the heart of the object to be scanned, it is scanned in the high milliampere scanning area using high milliampere, and
The low milliampere scanning area is scanned using low milliampere.
This application discloses a kind of CT scan device of heart, including：
Pre-scan module, for the heart information of prescan object to be scanned, to obtain preliminary sweep data；
Module is rebuild, for several initial cardiac images according to the preliminary sweep data reconstruction not same period phase；
Optimal phase phase module is determined, for determining the optimal of the object to be scanned according to several described initial cardiac images
Phase phase；
Optimal scan module, is finally scanned for the heart based on relatively described object to be scanned of the optimal phase.
Optionally, the pre-scan module includes：
Scanning room phase submodule is determined, the scanning room phase for determining the prescan, the scanning room phase at least includes
One R -- R interval；
Scan position submodule is determined, the scan position for determining the prescan, the scan position includes described
At least one fault plane of the heart of object to be scanned；
Submodule is triggered, the heart for being triggered in the scan position to object to be scanned carries out the scanning room phase
Interior prescan.
Optionally, it is described to determine that optimal phase phase module includes：
Submodule is chosen, for choosing the heart area in several described initial cardiac images respectively；
Differential image submodule is determined, the absolute value of image difference in the heart area for determining the adjacent phase phase of each two,
To respectively obtain the differential image between the adjacent phase phase of each two；
Calculating sub module, the standard deviation for calculating the differential image between the adjacent phase phase of each two, and according to the mark
Quasi- difference draws curve movement；
Phase phase submodule is determined, for two region minimum points in the curve movement to be identified as into optimal receipts
Contracting phase phase and optimal diastole phase.
Optionally, the optimal scan module includes：
Drop shadow spread's submodule is determined, for mutually determining the corresponding projection angle model of scan data according to the optimal phase
Enclose；
First optimal scanning submodule, for only entering in the projection angle range to the heart of the object to be scanned
Row scanning.
Optionally, the optimal scan module includes：
Scanning area submodule is determined, for corresponding position of the optimal phase to be defined as into high milliampere scanning area,
And, other positions are defined as low milliampere scanning area；
Second optimal scanning submodule, for the heart for the object to be scanned, in the high milliampere scanning area
It is scanned, and is scanned in the low milliampere scanning area using low milliampere using high milliampere.
Compared with prior art, the application includes advantages below：
In the embodiment of the present application, formally carry out heart scanning before first using low dose the short time prescan come
Optimal phase phase is calculated, final heart scanning is mutually scanned according to the precalculated optimal phase, it is every so as to realize
Individual sweep object all has optimal phase phases that are different and meeting oneself heart condition, so as to avoid in the prior art for every
Individual sweep object is all using fixed phase scanning phase so that sweep time is not mutually good and causes cardiac image motion artifacts are more to show
As the risk of the not good caused scanning failure of selection because of sweep time phase also being significantly reduced, simultaneously because subsequently most
Scanning has the guidance of optimal phase phase eventually, therefore, it is possible to be prevented effectively from the scanning of other not wedding day phases, so as to reduce patient in scanning
During the x-ray irradiation dose that receives, on the premise of cardiac image quality is ensured reduce sweep object is penetrated by more X
The risk of line irradiation, also can guarantee that the correctness and validity of diagnosis.
Certainly, any product for implementing the application it is not absolutely required to while reaching all the above advantage.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme in the embodiment of the present application, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present application, for
For those of ordinary skill in the art, without having to pay creative labor, it can also be obtained according to these accompanying drawings
His accompanying drawing.
Fig. 1 is the flow chart of the CT scan embodiment of the method for the heart of the application；
Fig. 2 is the principle schematic of optimal phase phase computational methods in the application；
Fig. 3 is the principle schematic that the optimal phase mutually instructs single phase scanning phase in the application；
Fig. 4 be in the application the optimal phase mutually instruct to become the principle schematic of x-ray tube current scanning；
Fig. 5 is a kind of structured flowchart of the CT scan device embodiment of heart of the application.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only some embodiments of the present application, rather than whole embodiments.It is based on
Embodiment in the application, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of the application protection.
The application can be used in numerous general or special purpose computing device environment or configuration.For example：Personal computer, service
Device computer, handheld device or portable set, laptop device, multi-processor device including any of the above device or equipment
DCE etc..
The application can be described in the general context of computer executable instructions, such as program
Module.Usually, program module includes performing particular task or realizes routine, program, object, the group of particular abstract data type
Part, data structure etc..The application can also be put into practice in a distributed computing environment, in these DCEs, by
Remote processing devices connected by communication network perform task.In a distributed computing environment, program module can be with
Positioned at including in the local and remote computer-readable storage medium including storage device.
With reference to Fig. 1, a kind of flow chart of the CT scan embodiment of the method for heart of the application is shown, the present embodiment can be wrapped
Include following steps：
Step 101：The heart information of prescan object to be scanned, to obtain preliminary sweep data.
In the embodiment of the present application, it is necessary to first using low dose of to scanning pair before formal cardiac CT scan is carried out
As carrying out once of short duration prescan, preliminary sweep data are obtained with this, the preliminary sweep data, which are used to subsequently calculate, to be obtained
The optimal phase phase of sweep object.Wherein, the preliminary sweep data can include data for projection and corresponding ECG data.Initially
Scan data can be the scan data for the sweep object being obtained ahead of time, and can also be the scan data being individually scanned.
The scan type of prescan can be that tomoscan can also be helical scanning, and scan position should cover whole hearts of sweep object
Dirty district domain or the subregion of heart.Contrast agent can be injected when carrying out prescan, contrast agent can not also be injected.
Wherein, the heart information of prescan object to be scanned, to obtain preliminary sweep data, can specifically include：
Step A1：The scanning room phase of the prescan is determined, the scanning room phase at least includes a R -- R interval.
In the heart information of prescan object to be scanned, it is thus necessary to determine that the scanning room phase of prescan, the scanning room phase is extremely
Include a R -- R interval less.In the present embodiment, in order to reconstructing whole phase phase images of the sweep object and for counting
Optimal phase phase is calculated, preliminary sweep data must be including at least a R -- R interval data in the electrocardiogram of sweep object.Wherein, R-R
Between the phase represent region in patient's electrocardiogram between continuous two R ripples.
Step A2：The scan position of the prescan is determined, the scan position includes the heart of the object to be scanned
At least one fault plane.
In addition, also needing to set the scan position of prescan before prescan, at least to wrap in preliminary sweep data
The information of heart tissue containing a part of sweep object.Therefore, in order to determine the optimal phase phase of heart movement, scan data is necessary
Heart information comprising motion, scan position should include at least one fault plane of the heart of object to be scanned.
It is understood that step A1 and step A2 particular order can not be limited by its sequence number.Also, in order to save
Flow is saved, if there is the scan data for meeting the above condition of scanning in the scanning sequence of the sweep object, the scan data is same
Sample can for calculate patient optimal phase phase.
Step A3：Carry out the heart of object to be scanned in the scanning room phase pre- is triggered in the scan position to sweep
Retouch.
In the scan position that step A2 is determined, the prescan in a phase is scanned to the heart of sweep object, so that
Obtain preliminary sweep data.
Subsequently enter step 102：Several initial cardiac images according to the preliminary sweep data reconstruction not same period phase.
After the preliminary sweep data of the heart of sweep object are obtained, initial according to the heart for obtaining sweep object is swept
Data are retouched, several initial cardiac images of not same period phase are reconstructed in a R -- R interval.
Step 103：The optimal phase phase of the object to be scanned is determined according to several described initial cardiac images.
In this step, then according to step 102 many phase phase initial cardiac images reconstructed, calculating obtains the patient most
Excellent phase phase.It should be noted that calculating the optimal phase mutually has a variety of methods, the typically all initial heart of phase of many phases by reconstructing
The Variation Features of dirty image draw heart movement degree curve, and determine in heart movement degree curve two phases of minimum
Respectively as optimum angle, such as diastole and systole phase.
Wherein, this step can include in the specific implementation：
Step B1：The heart area in several described initial cardiac images is chosen respectively.
Participate in shown in Fig. 2, be the principle schematic of optimal phase phase computational methods in the embodiment of the present application.In fig. 2, one
Reconstructed in individual R -- R interval several not same period phase initial cardiac image be A, B, C and D, respectively in A, B, C and D choose
It is heart area interested to go out in heart area interested, such as Fig. 2 the part irised out of broken circle schemed in A.
It is understood that the time limit different in the R -- R interval can be selected according to actual needs come reconstruct it is different just
Beginning cardiac image.
Step B2：The absolute value of image difference in the heart area of the adjacent phase phase of each two is determined, to respectively obtain each two
Differential image between adjacent phase phase.
After determining heart area interested, by the image in the heart area interested of the adjacent phase phase of each two
Make the difference and take absolute value, so that the differential image between obtaining the initial cardiac images of two adjacent phase phases.For example, in Fig. 2 by
The differential image ︱ A-B ︱ that image A and image B are obtained, or differential image ︱ the B-C ︱, Huo Zheyou obtained by image B and image C
The differential image ︱ C-D ︱ that image C and image D are obtained.
Step B3：The standard deviation of the differential image between the adjacent phase phase of each two is calculated, and is drawn according to the standard deviation
Curve movement.
Step B4：Two region minimum points in the curve movement are identified as optimal systole phase phase and optimal
Diastole phase.
Differential image ︱ A-B ︱, the ︱ B-C ︱ and ︱ C-D ︱ that step B3 is obtained calculate standard deviation, and the mark obtained according to calculating
Quasi- difference draws curve movement g (t), with reference to shown in Fig. 2, chooses corresponding value (such as Fig. 2 of two region minimum points in g (t)
In optimal phase phase a points and optimal phase phase b points) be used as the optimal phase phase of the patient.
It is specific it is determined that during optimal systole phase phase and optimal diastole phase, the spy that can be moved according to human heart
There are two region minimum points in point, heart movement curve, the region minimum point corresponding phase nearer apart from R peaks is mutually referred to as
Optimal systole phase phase (if regarding the phase between a RR as 100%, then the optimal systole phase accordingly in the range of 0~50%, and
Optimal diastole is accordingly in the range of 50%~100%).Therefore in the present embodiment, with 50% can be boundary by electrocardiogram
Limit is divided into two parts, preceding 50% and rear 50% two region minimum points is found respectively, so as to finally obtain optimal phase phase
Point a (being used as optimal retraction phase phase) and optimal phase phase point b (being used as optimal diastole phase).
Fig. 1 is then returned to, into step 104：Heart based on relatively described object to be scanned of the optimal phase is carried out most
Scanning eventually.
Related heart scanning parameter, such as X-ray are set to optimal phase phase b according to optimal phase phase a in this step
Sweep time, initial sweep time, termination sweep time and x-ray tube current changing rule (variable x-ray tube current) etc.,
And with reference to the optimal phase phase calculated, the phase phase of sweep object is selected, so that the given period phase position in sweep object is carried out most
Excellent scanning.
Wherein, this step in the specific implementation, can there is various ways, and one way in which may comprise steps of：
Step C1：The corresponding projection angle range of scan data is mutually determined according to the optimal phase.
It is the principle schematic for mutually instructing single phase scanning phase the optimal phase with reference to shown in Fig. 3.In figure 3, chain-dotted line is (i.e.
Vertical dotted line in Fig. 3) for the position of optimal phase phase that calculates, and the scanning range of optimal scanning is with the position of optimal phase phase
It is set to center.Due to being limited by the projection angle range of reconstruction cardiac CT image, the scan data that every section of optimal scanning is obtained
Projection angle range should be greater than the scope of half-turn+X-ray fan angle.
Step C2：The heart of the object to be scanned is scanned in the projection angle range.
After the projection angle range of scan data is determined, only in the segment limit near the position of optimal phase phase
It is scanned to obtain data for projection, then motion scan bed is scanned in next optimal phase phase position again, and other
Position is not scanned, and X-ray (i.e. tomoscan mode) is not produced.With reference to Fig. 3, wherein shadow region is projection data range.
Wherein, when this step is implemented, a kind of mode can also may comprise steps of：
Step D1：Corresponding position of the optimal phase is defined as high milliampere scanning area, and, other positions are true
It is set to low milliampere scanning area.
It is the principle schematic for mutually instructing to become x-ray tube current scanning another optimal phase with reference to shown in Fig. 4.At this
In mode, corresponding position of optimal phase is defined as high milliampere scanning area, and other non-optimal phase phase positions are defined as
Low milliampere scanning area.
Step D2：For the heart of the object to be scanned, swept in the high milliampere scanning area using high milliampere
Retouch, and scanned in the low milliampere scanning area using low milliampere.
Using the manner, CT X-ray tube will launch X-ray always during whole scanning, but in the scanning of high milliampere
Region will be using the scanning of high milliampere, and is scanned in low milliampere scanning area using low milliampere.The electric current of CT X-ray tube is bigger
Used x-ray dose is also bigger, so that the cardiac image quality reconstructed is better.
It should be noted that both the above is the more commonly used scan mode, but heart scanning includes many kinds, as long as
The optimal phase calculated using the embodiment of the present application mutually can instruct heart scanning, to complete adopting for more accurate scan data
Collection and reconstruction.
It can be seen that, in the embodiment of the present application, use the pre- of low dose of short time first before formally heart scanning is carried out
Scan to calculate optimal phase phase, final heart scanning is mutually scanned according to the precalculated optimal phase, so as to
Realize that each sweep object has optimal phase phases that are different and meeting oneself heart condition, so as to avoid in the prior art
For each sweep object using fixed phase scanning phase so that sweep time is not mutually good and causes cardiac image motion artifacts more
Phenomenon, also significantly reduce because sweep time phase selection it is not good caused by scanning failure risk, simultaneously because subsequently
Final scanning have the guidance of optimal phase phase, therefore, it is possible to be prevented effectively from the scanning of other not wedding day phases, exist so as to reduce patient
The x-ray irradiation dose received in scanning process, sweep object is reduced by more on the premise of cardiac image quality is ensured
The risk of multi x-ray irradiation, also can guarantee that the correctness and validity of diagnosis.
For foregoing embodiment of the method, in order to be briefly described, therefore it is all expressed as to a series of combination of actions, still
Those skilled in the art should know that the application is not limited by described sequence of movement, because according to the application, it is some
Step can be carried out sequentially or simultaneously using other.Secondly, those skilled in the art should also know, described in the specification
Embodiment belong to preferred embodiment, necessary to involved action and module not necessarily the application.
It is corresponding with the method that a kind of CT scan embodiment of the method for heart of above-mentioned the application is provided, referring to Fig. 5, this Shen
A kind of CT scan device embodiment of heart please be additionally provide, in the present embodiment, the device can include：
Pre-scan module 501, for the heart information of prescan object to be scanned, to obtain preliminary sweep data.
Wherein, the pre-scan module 501 can specifically include：
Scanning room phase submodule is determined, the scanning room phase for determining the prescan, the scanning room phase at least includes
One R -- R interval；Scan position submodule is determined, the scan position for determining the prescan, the scan position can be with
At least one fault plane of heart including the object to be scanned；And, submodule is triggered, in the scan position
Trigger the prescan carried out to the heart of object to be scanned in the scanning room phase.
Module 502 is rebuild, for several initial cardiac images according to the preliminary sweep data reconstruction not same period phase.
Optimal phase phase module 503 is determined, for determining the object to be scanned according to several described initial cardiac images
Optimal phase phase.
Wherein, it is described to determine that optimal phase phase module 503 specifically include：
Submodule is chosen, for choosing the heart area in several described initial cardiac images respectively；Determine differential image
The absolute value of image difference, adjacent to respectively obtain each two in submodule, the heart area for determining the adjacent phase phase of each two
Differential image between phase phase；Calculating sub module, the standard deviation for calculating the differential image between the adjacent phase phase of each two, and
Curve movement is drawn according to the standard deviation；With, determine phase phase submodule, for by two regions in the curve movement most
Small value point is identified as optimal systole phase phase and optimal diastole phase.
Optimal scan module 504, is finally swept for the heart based on relatively described object to be scanned of the optimal phase
Retouch.
Wherein, the optimal scan module 504 can specifically include：
Drop shadow spread's submodule is determined, for mutually determining the corresponding projection angle model of scan data according to the optimal phase
Enclose；With the first optimal scanning submodule, for being carried out only in the projection angle range to the heart of the object to be scanned
Scanning.
Wherein, the optimal scan module 504 can specifically include：
Scanning area submodule is determined, for corresponding position of the optimal phase to be defined as into high milliampere scanning area,
And, other positions are defined as low milliampere scanning area；With the second optimal scanning submodule, for for described to be scanned
The heart of object, is scanned in the high milliampere scanning area using high milliampere, and is used in the low milliampere scanning area
Low milliampere scanning.
It can be seen that, in the embodiment of the present application, use the pre- of low dose of short time first before formally heart scanning is carried out
Scan to calculate optimal phase phase, final heart scanning is mutually scanned according to the precalculated optimal phase, so as to
Realize that each sweep object has optimal phase phases that are different and meeting oneself heart condition, so as to avoid in the prior art
For each sweep object using fixed phase scanning phase so that sweep time is not mutually good and causes cardiac image motion artifacts more
Phenomenon, also significantly reduce because sweep time phase selection it is not good caused by scanning failure risk, simultaneously because subsequently
Final scanning have the guidance of optimal phase phase, therefore, it is possible to be prevented effectively from the scanning of other not wedding day phases, exist so as to reduce patient
The x-ray irradiation dose received in scanning process, sweep object is reduced by more on the premise of cardiac image quality is ensured
The risk of multi x-ray irradiation, also can guarantee that the correctness and validity of diagnosis.
It should be noted that each embodiment in this specification is described by the way of progressive, each embodiment weight
Point explanation be all between difference with other embodiment, each embodiment identical similar part mutually referring to.
For device class embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, related part is joined
See the part explanation of embodiment of the method.
Finally, in addition it is also necessary to explanation, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between there is any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or equipment including a series of key elements not only include that
A little key elements, but also other key elements including being not expressly set out, or also include be this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged
Except also there is other identical element in the process including the key element, method, article or equipment.
The CT scan method and device to heart provided herein is described in detail above, used herein
Specific case is set forth to the principle and embodiment of the application, and the explanation of above example is only intended to help and understands this
The method and its core concept of application；Simultaneously for those of ordinary skill in the art, according to the thought of the application, specific
It will change in embodiment and application, in summary, this specification content should not be construed as to the application's
Limitation.
Claims (4)
1. a kind of CT scan method of heart, it is characterised in that this method includes：
The heart information of prescan object to be scanned, to obtain preliminary sweep data；The heart of the prescan object to be scanned
Information, to obtain preliminary sweep data, including：The scanning room phase of the prescan is determined, the scanning room phase at least includes one
Individual R -- R interval；The scan position of the prescan is determined, the scan position includes the heart of the object to be scanned at least
One fault plane；The prescan carried out to the heart of object to be scanned in the scanning room phase is triggered in the scan position；
Several initial cardiac images according to the preliminary sweep data reconstruction not same period phase；
The optimal phase phase of the object to be scanned is determined according to several described initial cardiac images；
Based on the optimal phase, the heart of relatively described object to be scanned is finally scanned；It is described relative based on the optimal phase
The heart of the object to be scanned is finally scanned, including：The corresponding projection of scan data is mutually determined according to the optimal phase
Angular range；Only the heart of the object to be scanned is scanned in the projection angle range；
Or, the heart based on relatively described object to be scanned of the optimal phase is finally scanned, including：By described in most
The excellent phase, corresponding position was defined as high milliampere scanning area, and, other positions are defined as low milliampere scanning area；For
The heart of the object to be scanned, is scanned, and swept in the low milliampere in the high milliampere scanning area using high milliampere
Region is retouched to scan using low milliampere.
2. according to the method described in claim 1, it is characterised in that determined according to several initial cardiac images reconstructed described
The optimal phase phase of object to be scanned, including：
The heart area in several described initial cardiac images is chosen respectively；
The absolute value of image difference in the heart area of the adjacent phase phase of each two is determined, to respectively obtain between the adjacent phase phase of each two
Differential image；
The standard deviation of the differential image between the adjacent phase phase of each two is calculated, and curve movement is drawn according to the standard deviation；
Two region minimum points in the curve movement are identified as optimal systole phase phase and optimal diastole phase.
3. a kind of CT scan device of heart, it is characterised in that including：
Pre-scan module, for the heart information of prescan object to be scanned, to obtain preliminary sweep data；The prescan mould
Block includes：Scanning room phase submodule is determined, the scanning room phase for determining the prescan, the scanning room phase at least includes one
Individual R -- R interval；Scan position submodule is determined, the scan position for determining the prescan, the scan position includes institute
State at least one fault plane of the heart of object to be scanned；Submodule is triggered, is swept for triggering to treat in the scan position
Retouch the prescan in the heart progress scanning room phase of object；
Module is rebuild, for several initial cardiac images according to the preliminary sweep data reconstruction not same period phase；
Optimal phase phase module is determined, the optimal phase for determining the object to be scanned according to several described initial cardiac images
Phase；
Optimal scan module, is finally scanned for the heart based on relatively described object to be scanned of the optimal phase；It is described
Optimal scan module includes：Drop shadow spread's submodule is determined, for mutually determining the corresponding throwing of scan data according to the optimal phase
Shadow angular range；First optimal scanning submodule, for the heart only in the projection angle range to the object to be scanned
It is dirty to be scanned；
Or, the optimal scan module includes：Scanning area submodule is determined, for by corresponding position of the optimal phase
It is defined as high milliampere scanning area, and, other positions are defined as low milliampere scanning area；Second optimal scanning submodule,
For the heart for the object to be scanned, it is scanned in the high milliampere scanning area using high milliampere, and described
Low milliampere scanning area is scanned using low milliampere.
4. device according to claim 3, it is characterised in that the optimal phase phase module of determination includes：
Submodule is chosen, for choosing the heart area in several described initial cardiac images respectively；
Differential image submodule is determined, the absolute value of image difference in the heart area for determining the adjacent phase phase of each two, to divide
The differential image between the adjacent phase phase of each two is not obtained；
Calculating sub module, the standard deviation for calculating the differential image between the adjacent phase phase of each two, and according to the standard deviation
Draw curve movement；
Phase phase submodule is determined, for two region minimum points in the curve movement to be identified as into the optimal systole phase
Mutually with optimal diastole phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410699491.3A CN104545973B (en) | 2014-11-26 | 2014-11-26 | The CT scan method and device of heart |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410699491.3A CN104545973B (en) | 2014-11-26 | 2014-11-26 | The CT scan method and device of heart |
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| CN104545973A CN104545973A (en) | 2015-04-29 |
| CN104545973B true CN104545973B (en) | 2017-08-25 |
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| CN105902279B (en) | 2016-06-02 | 2019-02-19 | 沈阳东软医疗系统有限公司 | A kind of method and apparatus that scan image is rebuild |
| EP3509495B1 (en) * | 2016-09-08 | 2022-11-09 | Koninklijke Philips N.V. | Cardiac computed tomography |
| CN107049351B (en) * | 2017-04-01 | 2020-04-10 | 东软医疗系统股份有限公司 | Positron emission computed tomography (PET) equipment scanning method and device |
| CN108272466B (en) * | 2018-03-15 | 2021-06-18 | 东软医疗系统股份有限公司 | Scanning method and scanning device |
| US10950016B2 (en) | 2018-06-11 | 2021-03-16 | Shanghai United Imaging Healthcare Co., Ltd. | Systems and methods for reconstructing cardiac images |
| CN109389653B (en) * | 2018-09-27 | 2023-01-03 | 上海联影医疗科技股份有限公司 | Cardiac image reconstruction method, cardiac image reconstruction device, computer equipment and readable storage medium |
| CN109171775A (en) * | 2018-07-04 | 2019-01-11 | 沈阳东软医疗系统有限公司 | Imaging method and scan control method, device, system, equipment and storage medium |
| CN110728730B (en) * | 2019-09-30 | 2023-08-29 | 东软医疗系统股份有限公司 | Image reconstruction method, device, CT equipment and CT system |
| CN111084635B (en) * | 2020-01-02 | 2023-03-31 | 沈阳先进医疗设备技术孵化中心有限公司 | CT scanning method and device, CT equipment and CT system |
| CN112083993B (en) * | 2020-09-02 | 2024-06-07 | 上海联影医疗科技股份有限公司 | Scanning protocol generation method and device, electronic equipment and storage medium |
| CN112330800B (en) * | 2020-10-28 | 2023-12-29 | 沈阳先进医疗设备技术孵化中心有限公司 | Image reconstruction method, device, console device and CT system |
| CN112603338B (en) * | 2020-12-02 | 2021-11-12 | 赛诺威盛科技(北京)股份有限公司 | Method and device for selecting and retrospective reconstruction data of heart spiral retrospective reconstruction |
| CN115137383B (en) * | 2022-06-13 | 2022-12-23 | 赛诺威盛科技(北京)股份有限公司 | Method and device for selecting and retrospective reconstruction data of heart spiral retrospective reconstruction |
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| JP4777007B2 (en) * | 2005-08-03 | 2011-09-21 | 東芝メディカルシステムズ株式会社 | X-ray computed tomography system |
| JP4777164B2 (en) * | 2006-06-30 | 2011-09-21 | 株式会社東芝 | HEART RATE DETERMINATION DEVICE, PROGRAM, AND X-RAY DIAGNOSIS DEVICE |
| EP2091435A1 (en) * | 2006-11-03 | 2009-08-26 | Philips Intellectual Property & Standards GmbH | Cardiac phase determination |
| JP5208442B2 (en) * | 2007-04-12 | 2013-06-12 | ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー | X-ray CT system |
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