CN109171775A

CN109171775A - Imaging method and scan control method, device, system, equipment and storage medium

Info

Publication number: CN109171775A
Application number: CN201810726677.1A
Authority: CN
Inventors: 黎新亮
Original assignee: Neusoft Medical Systems Co Ltd
Current assignee: Neusoft Medical Systems Co Ltd
Priority date: 2018-07-04
Filing date: 2018-07-04
Publication date: 2019-01-11

Abstract

This application discloses a kind of imaging and scan control method, device, system, equipment and storage medium, the scan control method includes: to obtain scanning time started and end of scan time；Obtain scanning starting position and scan end position；Examination couch is controlled in the scanning time started, the scanning starting position is moved to target speed, and is continued with the target velocity to the scan end position uniform motion；The scanning device is controlled from the scanning time started, starts continuous scanning checked object, until the end of scan time.Implement the embodiment of the present application, while checked object being driven with self-check bed from scanning starting position to scan end position uniform motion, starts continuous scanning checked object, in turn, sweep time can be shortened, improve scan efficiency, while reducing the dosage of checked object raying.

Description

Imaging method and scan control method, device, system, equipment and storage medium

Technical field

This application involves imaging control technology field more particularly to imaging method and scan control method, device, system, Equipment and storage medium.

Background technique

In medical imaging field, imaging system generallys use corresponding signal and is scanned to certain position of subject, and By a series of processing to scanning result, the image of subject is obtained.It is CT system with imaging system, subject is human body For, under certain scenes, need to obtain the image in subject peculair motion period.

It is detected the image in position peculair motion period in order to obtain, the relevant technologies control the same of scanning device scanning subject When, the motor message of synchronous detection subject is corresponding with the motor message of detection by scan data, tested long lasting for scanning After body is until scan through subject, according to the corresponding relationship of scan data and the motor message of detection, the special fortune of subject is selected Dynamic period corresponding scan data, carries out image reconstruction.Although the technology can obtain the tested special fortune in position to a certain extent The image in dynamic period, still, long lasting for scanning subject, the sweep time of consuming is longer, the radiation injury to subject Greatly.

Summary of the invention

The application provides imaging method and scan control method, device, system, equipment and storage medium, to drop as far as possible The scanning duration of low imaging system, the radiation injury to subject.

According to the embodiment of the present application in a first aspect, providing a kind of scan control method, comprising:

Obtain scanning time started and end of scan time；Wherein, scanning time started and when the end of scan Between it is corresponding with the predicted time that checked object is moved with predetermined motion feature；

Obtain scanning starting position and scan end position；

Examination couch is controlled in the scanning time started, the scanning starting position is moved to target speed, and Continue with the target velocity to the scan end position uniform motion；

The scanning device is controlled from the scanning time started, starts continuous scanning checked object, until the scanning End time.

In one embodiment, the target velocity is to be rotated according to the screw pitch of scanning device, collimator width and rack The step of velocity amplitude of speed pre-generatmg, target velocity described in pre-generatmg includes:

Obtain screw pitch, collimator width and the gantry rotation rate of the scanning device；

The product of acquired screw pitch and collimator width is calculated, the ratio with acquired gantry rotation rate is described Target velocity.

In one embodiment, control examination couch is moved to described in the scanning time started with target speed Starting position is scanned, and is continued with the target velocity to the scan end position uniform motion, comprising:

The examination couch is controlled to park to away from the position for starting scan position preset distance；Wherein, the pre- spacing Curve is accelerated by it from for the examination couch, from the static minimum movement distance for accelerating to the target velocity；

At the time of the examination couch is controlled from apart from the scanning time started scheduled duration, start to accelerate by it bent Line accelerates；Wherein, the scheduled duration accelerates curve by it for the examination couch and accelerates to the target from static The minimum movement duration of speed；

After the examination couch accelerates the scheduled duration, the examination couch uniform motion is controlled.

In one embodiment, the acquisition scanning time started and end of scan time, comprising:

Obtain the resulting real time kinematics signal of motion conditions of checked object described in real-time monitoring；

Real time kinematics signal based on acquisition, obtains the characteristics of motion of the checked object；

The checked object motion change most slow time is predicted according to the characteristics of motion, when obtaining the prediction Between；

By the time of its predetermined period of the front distance of the predicted time, it is determined as the scanning time started；

By the time after the predicted time apart from its predetermined period, it is determined as the end of scan time.

Based on the real time kinematics signal, judge current time whether reach the checked object most motion intense when Between；

If it is, controlling the examination couch after predetermined delay duration and starting to accelerate curve accelerated motion by it；

After the examination couch accelerates scheduled duration, the examination couch uniform motion is controlled；

Wherein, the scheduled duration accelerates curve by it for the examination couch and accelerates to the target velocity from static Minimum movement duration；

The predetermined delay duration is that the scanning time started and the scheduled duration and the checked object move most The difference of the predicted time value at violent moment.

In one embodiment, the checked object is heart, and the scanning device is CT scan equipment, described tested pair The time occurred as the peak R that the time of most motion intense is electrocardiosignal.

In one embodiment, the above method is further comprising the steps of:

Gate curve width, the screw pitch and the product of this three of collimator width are obtained, is revolved with the rack The ratio of rotary speed；The gate curve width is the time difference of the end of scan time and the scanning time started；

If acquired ratio is greater than the width of the checked object, following operation is executed:

In one embodiment, if acquired ratio is less than the width of the checked object, the above method includes:

Determine scanning starting position and the scan end position of each scan period；

Based on the scanning bed accelerated motion curve, the real time kinematics signal of the checked object and each scan period Scan end position and lower scan cycle scanning starting position, determine scanning time started and the scanning of each scan period End time；

If the difference of the last one end of scan time and first scanning time started, are less than scheduled time threshold, Then following operation is executed in each scan period:

Examination couch is controlled in the scanning time started of the scan period, which is moved to target speed Starting position is scanned, and is continued with the target velocity to the scan end position uniform motion of the scan period；

Scanning time started of the scanning device from the scan period is controlled, continuous scanning checked object is started, until The end of scan time of the scan period.

According to the second aspect of the embodiment of the present application, a kind of imaging method is provided, comprising:

Operation in image processing method as described above；

It obtains the scanning device and scans the resulting data for projection of checked object；

Image reconstruction is carried out according to acquired data for projection, obtains the reconstruction image of the checked object.

According to the third aspect of the embodiment of the present application, a kind of scan controller is provided, comprising:

Time-obtaining module, for obtaining scanning time started and end of scan time；Wherein, the scanning time started It is corresponding with the predicted time that checked object is moved with predetermined motion feature with the end of scan time；

Position acquisition module, for obtaining scanning starting position and scan end position；

Examination couch control module is moved to for controlling examination couch in the scanning time started with target speed The scanning starting position, and continue with the target velocity to the scan end position uniform motion；

It is tested to start continuous scanning for controlling the scanning device from the scanning time started for scan control module Object, until the end of scan time.

In one embodiment, the target velocity is to be rotated according to the screw pitch of scanning device, collimator width and rack The module of the velocity amplitude of speed pre-generatmg, target velocity described in pre-generatmg is configured as:

In one embodiment, the examination couch control module includes:

Control module is parked, is parked for controlling the examination couch to away from the position for starting scan position preset distance It sets；Wherein, the preset distance is the examination couch by its accelerated motion curve, accelerates to the target velocity most from static Small move distance；

Accelerate control module, at the time of for controlling the examination couch from apart from the scanning time started predetermined period, Start to accelerate curve accelerated motion by it；The scheduled duration is that the examination couch is added by its accelerated motion curve from static Speed arrives the minimum movement duration of the target velocity；

At the uniform velocity control module, for it is even to control the examination couch after the examination couch accelerates the scheduled duration Speed movement.

In one embodiment, the time-obtaining module includes:

Live signal obtains module, the resulting real time kinematics of motion conditions for obtaining checked object described in real-time monitoring Signal；

Characteristics of motion determining module obtains the movement rule of the checked object for the real time kinematics signal based on acquisition Rule；

Time prediction module, when the motion change for predicting the checked object according to the characteristics of motion is most slow Between；

Time started determining module, for being determined as in the time of its predetermined period of the front distance for the time predicted The scanning time started；

End time determining module, for being determined as the time after the time predicted apart from its predetermined period The end of scan time.

In one embodiment, the examination couch control module is configured as:

In one embodiment, above-mentioned apparatus further include:

Ratio obtains module, for obtaining gate curve width, the screw pitch and this three of collimator width Product, the ratio with the gantry rotation rate；The gate curve width is to open with the scanning end of scan time The time difference of time beginning；

Trigger module being controlled, when for being not less than the width of the checked object in acquired ratio, being allowed:

The examination couch control module control examination couch moves to institute in the scanning time started with target speed Scanning starting position is stated, and is continued with the target velocity to the scan end position uniform motion；

The scan control module controls the scanning device from the scanning time started, starts tested pair of continuous scanning As until the end of scan time.

According to the fourth aspect of the embodiment of the present application, a kind of imaging device is provided, comprising:

Image processing apparatus as described above；

Projection obtains module, scans the resulting data for projection of checked object for obtaining the scanning device；

Image reconstruction module obtains the checked object for carrying out image reconstruction according to acquired data for projection Reconstruction image.

According to the 5th of the embodiment of the present application the aspect, a kind of computer equipment is provided, comprising:

Processor；

The memory of storage processor executable instruction；

Wherein, the processor is coupled in the memory, for reading the program instruction of the memory storage, and makees For response, the operation in method as described above is executed.

According to the 6th of the embodiment of the present application the aspect, one or more machine readable storage mediums are provided, are stored thereon with Instruction, when executed by one or more processors, so that computer equipment executes the operation in method as described above.

Using the embodiment of the present application, from controlling the examination couch self-scanning time started, with target speed since scanning Position is mobile to scan end position, while controlling the scanning device self-scanning time started, starts continuous scanning checked object, directly To the end of scan time.Wherein, scanning time started and end of scan time are moved with checked object with predetermined motion feature Predicted time it is corresponding, it is scanning bed move to and start scan position while start continuous scanning, can will retouch the position of bed It is associated with the moving situation of checked object.Therefore, checked object can be driven from scanning starting position to sweeping with self-check bed While retouching end position uniform motion, start continuous scanning checked object, shorten sweep time, improves scan efficiency, simultaneously Reduce the dosage of checked object raying.

In turn, the time of scanning device continuous scanning and position become with the movement velocity and checked object volume of examination couch Change most slow predicted time and do any additional operation without checked object to when corresponding to, scanning device can be at tested pair Data for projection as continuous scanning checked object in the volume variation most slow short time, after obtaining continuous scanning.

Furthermore change in the most slow short time in the volume of checked object and scans checked object, when subject moves Data for projection accounting in resulting data for projection is lower, and then based on the data for projection reconstruction image after continuous scanning, movement The probability that artifact generates is lower, can effectively improve the clarity of the image of checked object, increases the image based on checked object The accuracy of diagnostic result obtained.

In addition, changing continuous scanning checked object in the most slow short time in checked object volume, checked object is at it He is not influenced the time by scanning signal, can reduce injury of the scanning signal to checked object.

Moreover, since the time of continuous scanning is shorter, being not necessarily to when checked object is related to cardia or the lung position of human body User, which holds one's breath, can be obtained continuous data for projection, and changes in heart rate caused by holding one's breath can be effectively reduced, changes in heart rate is avoided to make At image quality issues.

It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not The application can be limited.

Detailed description of the invention

The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application Example, and together with specification it is used to explain the principle of the application.

Figure 1A is the architecture diagram of the imaging system shown in one exemplary embodiment of the application；

Figure 1B is the structural schematic diagram of the scanning device shown in one exemplary embodiment of the application；

Fig. 2 is the architecture diagram of the imaging system shown in the application another exemplary embodiment；

Fig. 3 A is the flow chart of the scan control method shown in one exemplary embodiment of the application；

Fig. 3 B is the signal of the motor message relative time variation of the checked object shown in one exemplary embodiment of the application Figure；

Fig. 4 is the flow chart of the scan control method shown in the application another exemplary embodiment；

Fig. 5 is the flow chart of the scan control method shown in the application another exemplary embodiment；

Fig. 6 is the flow chart of the imaging method shown in one exemplary embodiment of the application；

Fig. 7 is the hardware structural diagram of the computer equipment shown in one exemplary embodiment of the application；

Fig. 8 is the block diagram of the scan controller shown in one exemplary embodiment of the application；

Fig. 9 is the block diagram of the imaging device shown in one exemplary embodiment of the application.

Specific embodiment

It is only to be not intended to be limiting the application merely for for the purpose of describing particular embodiments in term used in this application. It is also intended in the application and the "an" of singular used in the attached claims, " described " and "the" including majority Form, unless the context clearly indicates other meaning.It is also understood that term "and/or" used herein refers to and wraps It may be combined containing one or more associated any or all of project listed.

In practical application, pass through CT (Computed Tomography, i.e. CT scan), PET-CT (its Middle PET is the abbreviation of Positron Emission computed Tomography, means PET-Positron emission computed tomography Scanning) or other imaging systems scanning device scan checked object when, if checked object be Moving Objects, need to obtain In the case where the image in subject peculair motion period, such as: need to obtain the image in subject motion change most slow period, Probability in gained image there are motion artifacts is lower, therefore clarity is preferable.

For the image in subject motion change most slow period, the relevant technologies can supervise while scanning checked object The motion conditions of checked object are controlled, scan operation continues multiple periods of motion of checked object, is referred to supervise when constructing image The most slow period of motion change in each period of motion is scanned resulting data for projection for rebuilding a width by the motion conditions of control Image effectively reduces motion artifacts in image.

But the relevant technologies carry out continuous scanning to checked object in multiple periods of motion, therefore, to checked object Dose of radiation is big.

The application in view of the foregoing drawbacks, proposes a kind of scan control method, and this method control examination couch self-scanning starts It is mobile from scanning starting position to scan end position with target speed from time, while controlling scanning device self-scanning Time started starts continuous scanning checked object, until the end of scan time.Wherein, when the scanning time started is with the end of scan Between it is corresponding with the predicted time that checked object is moved with predetermined motion feature, it is scanning bed move to start scan position it is same When start continuous scanning, the moving situation of the position for retouching bed and checked object can be associated.It therefore, can be with self-check bed While checked object is driven from scanning starting position to scan end position uniform motion, start continuous scanning checked object, Shorten sweep time, improves scan efficiency, while reducing the dosage of checked object raying.

The application also proposed a kind of imaging method, the imaging method, obtain above-mentioned scan control method continuous scanning institute State the resulting data for projection of checked object；Image reconstruction is carried out according to acquired data for projection, obtains the checked object Reconstruction image.It can effectively improve picture quality.Below in conjunction with attached drawing 1A, the lower imaging side for realizing the application proposition is introduced first The imaging system of method.

Imaging system shown in figure 1A may include scanning device 110, processing equipment 130 and for carrying checked object Examination couch 120, imaging system mentioned herein can be CT imaging system, PET-CT imaging system or other need it is same The imaging system of step control scanning device.

Wherein, scanning device 110 can emit the signal of scanning checked object with respect to checked object from different perspectives, right The signal acquisition data for projection that should emit, and the signal of acquisition is transferred to processing equipment 130.

Processing equipment 130, for obtaining scanning time started, end of scan time, scanning starting position and the end of scan Position.Wherein, time mentioned herein and position can be set according to actual scanning, imaging or other scene demands.

In one example, the motion artifacts in image are reduced while improving scan efficiency, can be based on target object volume Change most slow predicted time to calculate scanning time started and end of scan time, target object can for checked object or The composition object of checked object, such as: checked object is human body, and target object is heart.

In another example, the predicted time of its interested motion feature can also be corresponded to by operator according to its interest, Adjust scanning time started and end of scan time.

And scanning starting position and scan end position can determine according to the unenhanced result of checked object, it can also be by curing It takes root and is determined by way of position line according to its clinical experience.

After acquisition time and position, processing equipment 130 can generate motion control based on acquired time and position and disappear Breath and scan control message；The movement control message is sent to examination couch 120；The scanning control is sent to scanning device 110 Message processed.

Examination couch 120 is transported in response to the movement control message in the scanning time started with target speed It moves to the scanning starting position, and continues with the target velocity to the scan end position uniform motion.Certain examples In, the target velocity can be determined at least by the screw pitch of scanning device 110, collimator width and gantry rotation rate.

In one example, if the pre-set target velocity to travel at the uniform speed of examination couch 120, movement control message can be with Only include scanning starting position and scanning the time started, by examination couch 120 according to scanning starting position, scanning the time started and The accelerated motion curve of itself determines acceleration and starts the time of Accelerating running.

In another example, if needing examination couch 120 to run slowly, motion control disappears after reaching scan end position Breath can also include scan end position and/or end of scan time, by examination couch 120 according to its retarded motion curve, scanning End position and/or end of scan time, after determining its uniform motion to scan end position, the acceleration that runs slowly.

In another example, if the designer of application scheme has planned the stand of examination couch 120 in advance, has added Speed and target velocity, processing equipment 130 can also obtain the position and acceleration that examination couch 120 is parked, and generate containing beginning The assisted instruction of acceleration time, and the instruction of the uniform motion containing the uniform motion time, are sent to examination couch in the corresponding time 120, the movement control message includes the assisted instruction and uniform motion instruction.In other examples, processing equipment 130 can generate the movement control message including other information, according to practical application scene to control examination couch 120 from institute It is mobile from the scanning starting position to the scan end position with target speed from stating the scanning time started.

Scanning device 110 starts continuous scanning institute from the scanning time started in response to the scan control message Checked object is stated, until the end of scan time.Meanwhile the data for projection after the checked object is scanned is acquired, and will Data for projection is transferred to processing equipment 130.

In one example, the scan control message can scan the scanning time started and end of scan time, control Scanning device 110 keeps continuous scanning within the period.Scanning mentioned herein can refer to helical scanning or tomoscan.

In another example, scan control message may include starting scan instruction and terminating scan instruction, in the scanning Time started sends the instruction for starting scanning to scanning device 110, sends and ties to scanning device 110 in the time for terminating to sweep The instruction of beam scanning.

In other examples, processing equipment 130 can generate the scan control including other information according to practical application scene Message starts checked object described in continuous scanning, until described to control scanning device 110 from the scanning time started The end of scan time.

Processing equipment 130 receives scanning device 110 and scans the resulting data for projection of the checked object, according to acquired Data for projection carry out image reconstruction, obtain the reconstruction image of the checked object.

In practical application, when imaging system difference, the scanning device of imaging system be would also vary from, below with CT system For, lower scanning device is specifically introduced in conjunction with Figure 1B, to the scanning of checked object and the generating process of data for projection:

CT imaging system may include the examination couch 15 and scanning device of carrying checked object as shown in Figure 1B, the scanning Equipment may include rack 11, the X-ray emitter being mounted in rack 11 and X ray detector 16.Wherein, X-ray emission Device may include x-ray source 12 and collimator 13, and for carrying checked object, X-ray detector 16 may include examination couch 15 The channel of multiple detection X-rays.

In practical application, examination couch 15 can advance along the direction axis R, and checked object (being not shown in Figure 1B) is taken to accordingly Detection zone, rack 11 can around be parallel to the direction z axis R rotation advance, drive X-ray emitter to multiple positions, it is right The checked object of detection zone takes multiple scan.

Every time when scanning, from X-ray emitter to the checked object emitting x-ray 14 of detection zone, in emitting x-ray When 14, the X-ray that x-ray source 12 generates is adjusted to parallel beam, fan-ray beam or cone beam by collimator 13 Afterwards, then to checked object emit.

The X-ray beam 14 of transmitting can penetrate checked object, be transmitted on X-ray detector 16, by X-ray detector 16 It receives X-ray and becomes electric signal through photoelectric conversion, then (Analog/Digital Converter, analog/digital turn through ADC Parallel operation) be converted to digital signal.These digital signals are properly termed as raw data, or alternatively referred to as data for projection.

After X-ray detector 16 exports data for projection, the embodiment of the present application is resulting in order to avoid obscuring each scanning Data for projection can be grouped by data for projection, and one group of data for projection is the resulting data of single pass checked object, correspond to this At least one of in time of scanning, position and angle.Wherein, the angle of scanning can be by Current Scan number and adjacent two The rotation angle of secondary scanning determines.

In its example, the scanning device and examination couch of PET-CT imaging system or other imaging systems be can also be used as The scanning device and examination couch of the imaging system of the embodiment of the present application, the scan control side proposed for realizing the embodiment of the present application Method or imaging method.

In imaging system shown in figure 1A, processing equipment 130 integrates scan control and image reconstruction, in other implementations In example, scan control can also be executed from image reconstruction by different equipment, specifically may refer to imaging system shown in Fig. 2.

Imaging system shown in Fig. 2 may include scanning device 210, control equipment 230, image reconstruction 240 and be used for The examination couch 220 of checked object is carried, scanning device 210, examination couch 220 and image reconstruction device 240 mentioned herein can To form CT imaging system, PET-CT imaging system or other need the imaging system of synchronously control scanning device.

Wherein, scanning device 210 is with respect to checked object, can emit the signal, right of scanning checked object from different perspectives The signal of acquisition is simultaneously transferred to image reconstruction device 240 by the signal acquisition data for projection that should emit.

Equipment 230 is controlled, for obtaining scanning time started, end of scan time, scanning starting position and the end of scan Position, wherein acquisition time and position may refer to the description in the embodiment that Figure 1A is related to, and details are not described herein.

Hereafter, control equipment 230 generates movement control message and scan control message based on acquired time and position； The movement control message is sent to examination couch 220；The scan control message is sent to scanning device 210.

In response to the movement control message, examination couch 220 is moved in the scanning time started with target speed To the scanning starting position, and continue with the target velocity to the scan end position uniform motion.In certain examples, The target velocity can be determined at least by the screw pitch of scanning device 110, collimator width and gantry rotation rate.

In response to the scan control message, scanning device 210 starts described in continuous scanning from the scanning time started Checked object, until the end of scan time.Meanwhile the data for projection after the checked object is scanned is acquired, and will throw Shadow data are transferred to image reconstruction device 240.

Image reconstruction device 240 receives scanning device 210 and scans the resulting data for projection of the checked object, according to institute The data for projection of acquisition carries out image reconstruction, obtains the reconstruction image of the checked object.

The scanning device that Fig. 2 is related to may refer to the scanning device that Figure 1A and Figure 1B are related to, and details are not described herein, tie below Attached drawing 3A is closed to attached drawing 6, programming system shown in Figure 1A or Fig. 2 is discussed in detail retouches control process and imaging process.

Fig. 3 A is please referred to, Fig. 3 A is the flow chart of the scan control method shown in one exemplary embodiment of the application, the reality Applying example can be applied on electronic equipment, include the following steps S301-S304:

Step S301, scanning time started and end of scan time are obtained；Wherein, it the scanning time started and described sweeps It is corresponding with the predicted time that checked object is moved with predetermined motion feature to retouch the end time.

Step S302, scanning starting position and scan end position are obtained.

Step S303, control examination couch moves to the scanning with target speed and opens in the scanning time started Beginning position, and continue with the target velocity to the scan end position uniform motion.

Step S304, the scanning device is controlled from the scanning time started, starts continuous scanning checked object, until The end of scan time.

The electronic equipment of the embodiment of the present application application can be the processing equipment for the embodiment description that Figure 1A is related to, at this Reason equipment can be the image reconstruction device for the embodiment description that Figure 1A is related to, and be also possible to the embodiment description that Fig. 2 is related to Control equipment.

In practical application, predetermined motion feature can be set according to actual scanning, imaging or other scene demands.

For example, can be by operator according to its interest, the predicted time of its corresponding interested motion feature adjusts scanning Time started and end of scan time.

For another example reducing the motion artifacts in image while needing to improve scan efficiency, predetermined motion feature can refer to Motion feature when motion change is most slow, when checked object is heart, heart volume variation most slowly i.e. heart movement variation Most slowly.

When obtaining scanning time started and end of scan data, most it can slowly be predicted based on target object motion change Time, to calculate scanning time started and end of scan time.In certain example, when can obtain scanning beginning by following operation Between and the end of scan time:

In this example, when the checked object or imaging system difference that are related to, the motor message of acquisition, acquisition motor message Mode, the resulting characteristics of motion, the time predicted and identified time all can be different.It is with checked object below The cardia of human body, imaging system are the mistake of acquisition scanning time started and end of scan time under being described in detail for CT system Journey:

When acquiring the motor message of checked object, electrocardiogram acquisition equipment (such as individual ECG Acquisition Device, electrocardio can be passed through The standard devices such as figure machine or patient monitor), the electrocardiosignal of heart is acquired, cardiac cycle ECG as shown in Figure 3B, R wave are obtained At the time of most violent for heart movement at wave crest, P phase is phase at the time of heart movement is most slow, when P phase is corresponding Between by time for being predicted in this example, t1n is the scanning time started, and t2n is the end of scan time, the time predicted with The time gap of t1n is the predetermined period, and t2n and the time gap of time calculated are the predetermined period.In Fig. 3 B V curve be examination couch curve movement, t0n to t1n be accelerate curve, t1n to t2n be the uniform motion stage, t2n is extremely T3n is retarded motion curve.

In addition, the difference of the time predicted and the time of the checked object most motion intense, can account for described tested The 70% of the period of motion of object；The interval of the scanning time started and the end of scan time can account for described tested 30% to the 40% of the period of motion of object.In another example, predetermined period mentioned herein or the time predicted, Ke Yiyou The designer or scanning device operator of this programme set according to actual imaging demand, based on the checked object Motor message is set as other numerical value, without limitation in the embodiment of the present application.

In other examples, when checked object is heart, electrocardiosignal can also be acquired by periphery pulse transducer；It is tested Object is other objects outside heart, such as the lung of human body, can also pass through breathing zone or breathing navigation equipment acquisition breathing letter Number, obtain the respiratory cycle.The embodiment of the present application is without limitation, specifically manipulates people by the application designer, scanning device Member determines according to checked object, imaging system or actual scanning demand.

In order to shorten scanning time-consuming as far as possible, from the embodiment of the present application needs the self-scanning time started, realize to tested The effective scanning of object obtains the data for projection of actual response checked object institutional framework.In view of this, the embodiment of the present application can With preparatory or real-time unenhanced checked object, the width of checked object is obtained, to determine in conjunction with the tracks of examination couch Starting position and scan end position are scanned, it is mentioned herein unenhanced, it is different with the difference of scanning device, such as: scanning When equipment is the scanning device in CT system, unenhanced unenhanced for CT, the embodiment of the present application is without limitation.In other examples, The position of position and the end of scan can also determining scanning by way of position line according to its clinical experience by doctor.

Behind the time and the position that determine scanning, in order to improve scan efficiency, need carrying out continuous scanning, and realization connects Continuous scanning needs examination couch to drive checked object uniform motion between the position that scanning starts and the position of the end of scan.Certain example In son, the speed of uniform motion is target velocity, which can be according to the screw pitch of scanning device, collimator width and machine The step of velocity amplitude of frame rotation speed pre-generatmg, target velocity described in pre-generatmg includes:

Obtain screw pitch, collimator width and the gantry rotation rate of the scanning device.

It, can be by processing equipment shown in figure 1A or control equipment shown in Fig. 2, shown in Figure 1A or Fig. 2 in this example Scanning device at obtain screw pitch, collimator width and gantry rotation rate, can also be by scanning device operator according to sweeping It retouches demand or after imaging demand designs, directly inputs processing equipment shown in figure 1A or control equipment shown in Fig. 2, specifically obtain The mode the embodiment of the present application of taking is with no restrictions.Screw pitch mentioned herein refers to that rack rotates a circle and checks the distance and scanning of bed motion The ratio of the width of signal beam；Collimator width refers to that the width of collimator refers to the collimation of bulb side when imaging system is CT system The width of device, in that case it can be decided that the width of thickness.

In other examples, target velocity further can also be determined according to image definition requirements, which is root According to the screw pitch of scanning device, collimator width, gantry rotation rate and predetermined image clarity, the velocity amplitude of pre-generatmg, in advance The step of generating the target velocity include:

Obtain the collimator width and gantry rotation rate of predetermined image clarity and scanning device.

Predetermined corresponding relationship between screw pitch based on image definition and the scanning device obtains and makes a reservation for clearly with described Spend corresponding screw pitch.

In this example, predetermined corresponding relationship between image definition and the screw pitch of the scanning device can be set by scanning Standby operator, sets according to actual working experience.

In other examples, in addition to pre-generatmg target velocity, target velocity can also be generated in real time during scan control, Or target velocity can also be determined by other means, the embodiment of the present application is without limitation.

After determining target velocity, in order to improve scan efficiency, it may be preferable to control examination couch and be accelerated extremely from static When scanning starting position, speed reaches target velocity just.In one embodiment, examination couch can be controlled by following operation In the scanning time started, the scanning starting position is moved to target speed, and continue with the target velocity To the scan end position uniform motion:

The examination couch is controlled to park to away from the position for starting scan position preset distance；Wherein, the pre- spacing Curve is accelerated by it from for the examination couch, from the static minimum movement distance for accelerating to the target velocity.

At the time of the examination couch is controlled from apart from the scanning time started scheduled duration, start to accelerate by it bent Line accelerates；Wherein, the scheduled duration accelerates curve by it for the examination couch and accelerates to the target from static The minimum movement duration of speed.By taking checked object is heart as an example, the time for starting to accelerate curve accelerated motion by it can To refer to t0n in Fig. 3 B, the scheduled duration can refer to the difference of t1n and t0n in Fig. 3 B.

Wherein, the accelerated motion curve of examination couch is determined by its own performance, can be by staff by repeatedly moving Test, obtains the accelerated motion curve of examination couch.The accelerated motion curve can indicate that examination couch with different acceleration, accelerates The distance of the time and movement expended to friction speed.

In addition, reaching and sweeping to further increase scan efficiency after preferably examination couch moves to scanning starting position It retouches the time started, the movement of checked object also has scheduled motion feature, in order to realize the purpose.In one embodiment, Scheduled motion feature is feature when motion change is most slow, and examination couch can be controlled by following operation and is opened in the scanning Begin the time, the scanning starting position is moved to target speed, and continue to tie with the target velocity to the scanning Beam position uniform motion:

This example can be using checked object as heart, and scanning device is for CT scan equipment, the checked object movement is most The violent time is the time that the peak R reaches in Fig. 3 B, and predetermined delay duration can refer to t0n and the peak R with the period of motion in Fig. 3 B The difference of the time of arrival.

In other examples, examination couch can also be controlled by other means from the scanning time started, is transported with target Dynamic speed is mobile from the scanning starting position to the scan end position, such as: control examination couch is from far from first motion position Place is set, slowly accelerates to target velocity at the beginning scan position, the time then started in the scanning, with target speed Uniform motion is spent to the scanning starting position, and continues uniform motion.

In addition, can control examination couch after reaching the end of scan time by its retarded motion curve, slowing down until speed It is zero, the difference that the smallest decrement time is t3n and t2n in Fig. 3 B, minimum movement distance is that curve and t3n and t2n are constituted Region area, stand be the corresponding position t3n.

And scanning device can stop the scanning to the checked object in the end of scan time.

As can be seen from the above embodiments: from the control examination couch self-scanning time started, with target speed since scanning Position is mobile to scan end position, while controlling the scanning device self-scanning time started, starts continuous scanning checked object, directly To the end of scan time.Wherein, scanning time started and end of scan time are moved with checked object with predetermined motion feature Predicted time it is corresponding, it is scanning bed move to and start scan position while start continuous scanning, can will retouch the position of bed It is associated with the moving situation of checked object.Therefore, checked object can be driven from scanning starting position to sweeping with self-check bed While retouching end position uniform motion, start continuous scanning checked object, shorten sweep time, improves scan efficiency, simultaneously Reduce the dosage of checked object raying.

In certain examples, if within a period of motion of checked object, it can complete the whole to checked object Scanning, can make the further highest of scan efficiency, checked object is influenced to further decrease by scanning signal, scanning device Service life extends, and specific implementation may refer to Fig. 4, and Fig. 4 is another scan control method for implementing to exemplify of the application, the scanning control Method processed may comprise steps of S401-S405:

Step S401, gate curve width, the screw pitch and the product of this three of collimator width are obtained, with institute State the ratio of gantry rotation rate；It is described gate curve width be the end of scan time and it is described scanning the time started when Between it is poor.

If step S402, acquired ratio is greater than the width of the checked object, obtains the scanning time started and sweep Retouch the end time；Wherein, the scanning time started and the end of scan time are and checked object is with predetermined motion feature The predicted time of movement is corresponding.

Step S403, scanning starting position and scan end position are obtained.

Step S404, control examination couch moves to the scanning with target speed and opens in the scanning time started Beginning position, and continue with the target velocity to the scan end position uniform motion.

Step S405, the scanning device is controlled from the scanning time started, starts continuous scanning checked object, until The end of scan time.

The invention relates to technical characteristic it is corresponding to the technical characteristic that the embodiment that Figure 1A to Fig. 3 B is related to is mentioned, Details are not described herein.

The difference is that not executing step S402 extremely if acquired ratio is less than the width of the checked object S405, but execute following operation:

Determine scanning starting position and the scan end position of each scan period.

Based on the scanning bed accelerated motion curve, the real time kinematics signal of the checked object and each scan period Scan end position and lower scan cycle scanning starting position, determine scanning time started and the scanning of each scan period End time.

Examination couch is controlled in the scanning time started of the scan period, which is moved to target speed Starting position is scanned, and is continued with the target velocity to the scan end position uniform motion of the scan period.

In some cases, the checked object is heart, and the scanning device is CT scan equipment, a scan period pair A cardiac cycle is answered, two adjacent scan periods can be spaced multiple cardiac cycles.

In one example, the scan end position in previous period is the scanning starting position of next cycle, can be passed through The scanning starting position in unenhanced determining different scanning period and scan end position.

Under certain scene, the checked object is heart, and the scanning device is CT scan equipment, the checked object movement The most violent time is the time that the peak R of electrocardiosignal occurs.Sweeping for lower the embodiment of the present application is described in detail below in conjunction with concrete scene Retouch control method:

Under the scene, electrocardiosignal is obtained using ECG monitor (ECG Monitor), and by the aroused in interest of electrocardiosignal The predicted value of cardiac cycle when period is as acquisition.The target phase of cardiac cycle is usually the diastole of heart, at this time heart Volume variation is slower, it is not easy to generate motion artifacts, compare and be appropriate for scanning.The target phase (P phase) of cardiac cycle is logical It is often 70% position of cardiac cycle or so corresponding phase, gate curve width can be the 30%-40% of cardiac cycle.

The step S501-S515 of scan control method as shown in Figure 5:

S501, the target velocity that examination couch is calculated according to gantry rotation rate, collimator width and screw pitch.

Wherein, target velocity=screw pitch * collimator width/gantry rotation rate

When S502, line computation of being write music according to the accelerated motion of examination couch go out examination couch and accelerate to the minimum movement of target velocity Between (t0n-t1n time width in Fig. 3 B), minimum movement distance (area in Fig. 3 B between t0n-t1n).N is to be greater than or wait In 1 integer.

S503, according to the target phase P (in Fig. 3 B at P phase) of cardiac cycle, gate curve width (t1n- in Fig. 3 B T2n time width) and examination couch target speed, calculate that how many scan period can complete heart scanning.

Wherein, the resulting numerical value of rotation speed that curve width * screw pitch coefficient * collimator width/rack allows is gated, greatly When heart width, then heart scanning can be completed within a cardiac cycle.

S504, it is calculated in 1 to n scan period according to target phase and gate curve width, each scan period Time started (t1n moment in Fig. 3 B), scanning starting position (position t1n in Fig. 3 B), end of scan time are scanned (in Fig. 3 B The t2n moment) with scan end position position (position t2n in Fig. 3 B), n is 1 when first scan period.

S505, examination couch is moved to range sweep starting position in n-th of scan period (position t1n in Fig. 3 B) institute (the corresponding position t0n in Fig. 3 B) is stated at the position of minimum movement distance.

S506, judge whether the peak R in electrocardiosignal reaches.

If the peak S507, R reaches, when according to the minimum movement for scanning time started and examination couch of n-th of scan period Between, it calculates the peak R delay time (t0n moment in Fig. 3 B), while resetting the peak R delay time counter.If do not reached, continue to walk Rapid S506.

S508, judge whether the peak the R delay time (t0n moment in Fig. 3 B) of n-th of scan period reaches.

If the peak the R delay time of S509, n-th of scan period do not reach, the peak R delay time counter is added It counts, return step S508.

If the peak the R delay time (t0n moment in Fig. 3 B) of S510, n-th scan period, controlling examination couch according to it Curve is accelerated to accelerate.

S511, when reach scan the time started when (t1n moment in Fig. 3 B), the position of examination couch also exactly scanning starts Position, while being also the optimal acquisition time window of heart, examination couch uniform motion is controlled within the scan period, while starting scanning Equipment starts continuous scanning checked object.When being scanning time started to the end of scan of n-th of scan period in the scan period Between.

S512, judge whether the end of scan time of n-th of scan period reaches (t2n in Fig. 3 B).

If S513, the end of scan time for reaching n-th of scan period, scanning device is closed, n adds 1.

S514, judge whether whole scan periods completes based on n, step S505 step is jumped to if not completing It continues to run.Terminate if it is the first scan period, can control examination couch according to the V curve in Fig. 3 B and move to Fig. 3 B The corresponding position middle t0n.

If S515, be fully completed, terminate entire scan control.

In the present embodiment, if the target of the collimator width and gantry rotation rate of CT scan equipment and examination couch is fast Degree, combination can complete whole heart scannings within a cardiac cycle, then the perspective ecg-gating technology of effective solution Cardiac segmentation scan caused by volume data acquire discontinuous problem, also can solve retrospect electrocardiogating technology high-resolution The big problem of dose of radiation caused by rate, low pitch overlapping scan.And due to the shortening of sweep time, held one's breath when requiring to patient Between shorten or do not need to hold one's breath.It not will lead to Heart Rate to accelerate because holding one's breath, so as to cause image vulnerable to changes in heart rate shadow Loud problem.The dose of radiation that patient is subject to is low, while also extending the service life of CT bulb.

Referring to Fig. 6, Fig. 6 is the flow chart of the imaging method shown in one exemplary embodiment of the application, which can To be applied in Figure 1A or imaging system shown in Fig. 2, S601-S606 may comprise steps of:

Step S601, scanning time started and end of scan time are obtained；Wherein, it the scanning time started and described sweeps It is corresponding with the predicted time that checked object is moved with predetermined motion feature to retouch the end time.

Step S602, scanning starting position and scan end position are obtained.

Step S603, control examination couch moves to the scanning with target speed and opens in the scanning time started Beginning position, and continue with the target velocity to the scan end position uniform motion.

Step S604, the scanning device is controlled from the scanning time started, starts continuous scanning checked object, until The end of scan time.

Step S605, it obtains the scanning device and scans the resulting data for projection of checked object.

Step S606, image reconstruction is carried out according to acquired data for projection, obtains the reconstruction image of the checked object.

The invention relates to technical characteristic, it is corresponding to the technical characteristic that Figure 1A to Fig. 5 embodiment being related to is mentioned, Details are not described herein.

The present embodiment carries out image reconstruction according to acquired data for projection, obtains the reconstruction image of the checked object Mode, it is different with the difference of imaging system, can be using the side of the method for CT reconstruction image, PET-CT reconstruction image The method of method or other imaging system reconstruction images, details are not described herein.

It is corresponding with the application scan control method/example of imaging method, present invention also provides scan controller/ The example of imaging device.Scan controller/imaging device can be applied to various computer equipments, such as CT, PET-CT etc Imaging system in, carry out the image reconstruction device of image procossing and/or image reconstruction, be also possible to other outer tools of imaging system There is the equipment of data-handling capacity.As shown in fig. 7, for the application scan controller/imaging device application computer equipment Hardware structural diagram, which may include processor 710, memory 720, nonvolatile memory 730.Its In, memory 720 and nonvolatile memory 730 are machine readable storage medium, processor 710 and machine readable storage medium 720, it 730 can be connected with each other by internal bus 740.In other possible implementations, the computer equipment is also possible to Including network interface 750, can be communicated with other equipment or component.In addition to processor 710 shown in Fig. 7, memory 720, except network interface 750 and nonvolatile memory 730, which can also include it according to actual functional capability needs His hardware is no longer shown one by one in Fig. 7.

In different examples, the machine readable storage medium 720,730 can be ROM (Read-Only Memory, read-only memory), it is volatile memory, nonvolatile memory, flash memory, memory driver (such as hard disk drive), solid State hard disk, any kind of storage dish (such as CD, DVD) perhaps similar storage medium or their combination.

Further, machine readable storage medium, can be specially to be stored with to fill with scan controller/imaging on memory 720 Set corresponding machine-executable instruction.It functionally divides, as shown in figure 8, scan controller may include time-obtaining module 810, position acquisition module 820, examination couch control module 830 and scan control module 840.

Wherein, time-obtaining module 810, for obtaining scanning time started and end of scan time；Wherein, the scanning Time started and the end of scan time are corresponding with the predicted time that checked object is moved with predetermined motion feature.

Position acquisition module 820, for obtaining scanning starting position and scan end position.

Examination couch control module 830 is moved for controlling examination couch in the scanning time started with target speed To the scanning starting position, and continue with the target velocity to the scan end position uniform motion.

Scan control module 840 starts continuous scanning institute for controlling the scanning device from the scanning time started Checked object is stated, until the end of scan time.

In one example, the target velocity is pre- according to the screw pitch of scanning device, collimator width and gantry rotation rate The module of the velocity amplitude of generation, target velocity described in pre-generatmg is configured as:

In another example, examination couch control module 830 may include:

In another example, time-obtaining module 810 may include:

As an example, examination couch control module 830 can be additionally configured to:

As an example, the checked object is heart, and the scanning device is CT scan equipment, the checked object movement The most violent time is the time that the peak R of electrocardiosignal occurs.

In another example, above-mentioned scan controller can also include:

Examination couch control module 830 controls examination couch in the scanning time started, moves to institute with target speed Scanning starting position is stated, and is continued with the target velocity to the scan end position uniform motion；

Scan control module 840 controls the scanning device from the scanning time started, starts tested pair of continuous scanning As until the end of scan time.

In another example, above-mentioned scan controller further include:

Period position determining module determines each scanning for being less than the width of the checked object in acquired ratio The scanning starting position in period and scan end position；

Cycle time determining module, for based on it is described it is scanning bed accelerate curve, the checked object it is real-time The scanning starting position of the scan end position of motor message and each scan period and lower scan cycle determines each scanning week The scanning time started and end of scan time of phase；

Period control module is less than for the difference in the last one end of scan time and first scanning time started Scheduled time threshold executes following operation in each scan period:

As shown in figure 9, imaging device may include time-obtaining module 910, position acquisition module 920, examination couch control mould Block 930, scan control module 940, projection obtain module 950 and image reconstruction module 960.

Wherein, time-obtaining module 910, for obtaining scanning time started and end of scan time；Wherein, the scanning Time started and the end of scan time are corresponding with the predicted time that checked object is moved with predetermined motion feature.

Position acquisition module 920, for obtaining scanning starting position and scan end position, wherein acquired position Unenhanced result based on the checked object generates.

Examination couch control module 930 is moved for controlling examination couch in the scanning time started with target speed To the scanning starting position, and continue with the target velocity to the scan end position uniform motion.

Scan control module 940 starts continuous scanning institute for controlling the scanning device from the scanning time started Checked object is stated, until the end of scan time.

Projection obtains module 950, scans the resulting data for projection of checked object for obtaining the scanning device.

Image reconstruction module 960 obtains the checked object for carrying out image reconstruction according to acquired data for projection Reconstruction image.

Technical characteristic in the present embodiment device is corresponding to the embodiment that Fig. 8 is related to, and details are not described herein

Figure 8 above and Fig. 9 Installation practice are corresponding to embodiment of the method, and details are not described herein.

Those skilled in the art will readily occur to its of the application after considering specification and practicing this disclosure Its embodiment.This application is intended to cover any variations, uses, or adaptations of the application, these modifications, purposes or Person's adaptive change follows the general principle of the application and including the undocumented common knowledge in the art of the application Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the application are by following Claim is pointed out.

It should be understood that the application is not limited to the precise structure that has been described above and shown in the drawings, and And various modifications and changes may be made without departing from the scope thereof.Scope of the present application is only limited by the accompanying claims.

Claims

1. a kind of scan control method characterized by comprising

Obtain scanning time started and end of scan time；Wherein, the scanning time started and the end of scan time are equal It is corresponding with the predicted time that checked object is moved with predetermined motion feature；

Obtain scanning starting position and scan end position；

Control examination couch moves to the scanning starting position in the scanning time started with target speed, and continues With the target velocity to the scan end position uniform motion；

The scanning device is controlled from the scanning time started, starts continuous scanning checked object, until the end of scan Time.

2. the method according to claim 1, wherein the target velocity is screw pitch, the standard according to scanning device The step of velocity amplitude of straight device width and gantry rotation rate pre-generatmg, target velocity described in pre-generatmg includes:

The product for calculating acquired screw pitch and collimator width, the ratio with acquired gantry rotation rate are the target Speed.

3. the method according to claim 1, wherein controlling examination couch in the scanning time started, with target Movement velocity moves to the scanning starting position, and continues at the uniform velocity to transport with the target velocity to the scan end position It is dynamic, comprising:

The examination couch is controlled to park to away from the position for starting scan position preset distance；Wherein, the preset distance is The examination couch accelerates curve by it, from the static minimum movement distance for accelerating to the target velocity；

At the time of the examination couch is controlled from apart from the scanning time started scheduled duration, start to add by its accelerated motion curve Speed movement；Wherein, the scheduled duration accelerates curve by it for the examination couch and accelerates to the target velocity from static Minimum movement duration；

4. the method according to claim 1, wherein acquisition scanning time started and end of scan time, Include:

The checked object motion change most slow time is predicted according to the characteristics of motion, to obtain the predicted time；

5. according to the method described in claim 4, it is characterized in that, controlling examination couch in the scanning time started, with target Movement velocity moves to the scanning starting position, and continues at the uniform velocity to transport with the target velocity to the scan end position It is dynamic, comprising:

Based on the real time kinematics signal, judge whether current time reaches the time of the checked object most motion intense；

Wherein, the scheduled duration accelerates curve by it for the examination couch and accelerates to the target velocity most from static Small movement duration；

The predetermined delay duration is the scanning time started and the scheduled duration and the checked object most motion intense The difference of the predicted time value at moment.

6. according to the method described in claim 5, the scanning device is CT it is characterized in that, the checked object is heart Scanning device, the time of the checked object most motion intense are the time that the peak R of electrocardiosignal occurs.

7. method according to any one of claim 1 to 6, which is characterized in that the method also includes following steps:

Gate curve width, the screw pitch and the product of this three of collimator width are obtained, rotates speed with the rack The ratio of degree；The gate curve width is the time difference of the end of scan time and the scanning time started；

8. the method according to the description of claim 7 is characterized in that if acquired ratio is less than the width of the checked object Degree, which comprises

Based on scanning bed accelerated motion curve, the real time kinematics signal of the checked object and the sweeping for each scan period The scanning starting position for retouching end position Yu lower scan cycle determines scanning time started and the end of scan of each scan period Time；

If the difference of the last one end of scan time and first scanning time started, are less than scheduled time threshold, then exist Each scan period executes following operation:

Examination couch is controlled in the scanning time started of the scan period, the scanning of the scan period is moved to target speed Starting position, and continue with the target velocity to the scan end position uniform motion of the scan period；

Scanning time started of the scanning device from the scan period is controlled, continuous scanning checked object is started, until this is swept Retouch the end of scan time in period.

9. a kind of imaging method characterized by comprising

Such as the operation in any one of claims 1 to 8 the method；

10. a kind of scan controller characterized by comprising

Time-obtaining module, for obtaining scanning time started and end of scan time；Wherein, the scanning time started and institute It is corresponding with the predicted time that checked object is moved with predetermined motion feature to state the end of scan time；

Examination couch control module is moved to described for controlling examination couch in the scanning time started with target speed Starting position is scanned, and is continued with the target velocity to the scan end position uniform motion；

Scan control module starts continuous scanning checked object for controlling the scanning device from the scanning time started, Until the end of scan time.

11. device according to claim 10, which is characterized in that the target velocity be according to the screw pitch of scanning device, The module of the velocity amplitude of collimator width and gantry rotation rate pre-generatmg, target velocity described in pre-generatmg is configured as:

12. device according to claim 10, which is characterized in that the examination couch control module includes:

Control module is parked, is parked for controlling the examination couch to away from the position for starting scan position preset distance；Its In, the preset distance is the examination couch by its accelerated motion curve, from the static minimum fortune for accelerating to the target velocity Dynamic distance；

Accelerate control module, at the time of for controlling the examination couch from apart from the scanning time started predetermined period, starts Curve is accelerated by it to accelerate；The scheduled duration is that the examination couch is accelerated to by its accelerated motion curve from static The minimum movement duration of the target velocity；

At the uniform velocity control module, for controlling the examination couch and at the uniform velocity transporting after the examination couch accelerates the scheduled duration It is dynamic.

13. device according to claim 10, which is characterized in that the time-obtaining module includes:

Live signal obtains module, the resulting real time kinematics letter of the motion conditions for obtaining checked object described in real-time monitoring Number；

Characteristics of motion determining module obtains the characteristics of motion of the checked object for the real time kinematics signal based on acquisition；

Time prediction module, the motion change most slow time for predicting the checked object according to the characteristics of motion；

Time started determining module, it is described in the time of its predetermined period of the front distance for the time predicted, will be determined as Scan the time started；

End time determining module, it is described for being determined as the time after the time predicted apart from its predetermined period The end of scan time.

14. device according to claim 13, which is characterized in that the examination couch control module is configured as:

15. device according to claim 14, which is characterized in that the checked object is heart, and the scanning device is CT scan equipment, the time of the checked object most motion intense are the time that the peak R of electrocardiosignal occurs.

16. device described in any one of 0 to 15 according to claim 1, which is characterized in that described device further include:

Ratio obtains module, for obtaining gate curve width, the screw pitch and the product of this three of collimator width, With the ratio of the gantry rotation rate；The gate curve width is the end of scan time and the scanning time started Time difference；

The examination couch control module control examination couch moves to described sweep in the scanning time started, with target speed It retouches starting position, and continues with the target velocity to the scan end position uniform motion；

The scan control module controls the scanning device from the scanning time started, starts continuous scanning checked object, Until the end of scan time.

17. a kind of imaging device characterized by comprising

Such as any one of claim 10 to 16 described device；

Image reconstruction module obtains the reconstruction of the checked object for carrying out image reconstruction according to acquired data for projection Image.

18. a kind of computer equipment characterized by comprising

Processor；

The memory of storage processor executable instruction；

Wherein, the processor is coupled in the memory, for reading the program instruction of the memory storage, and as sound It answers, executes such as the operation in any one of claim 1-9 the method.

19. one or more machine readable storage mediums, which is characterized in that instruction is stored thereon with, when by one or more When managing device execution, so that computer equipment is executed such as the operation in any one of claim 1-9 the method.