CN1711967A - X-ray diagnostic apparatus and X-ray imaging method - Google Patents
X-ray diagnostic apparatus and X-ray imaging method Download PDFInfo
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- CN1711967A CN1711967A CN 200510079126 CN200510079126A CN1711967A CN 1711967 A CN1711967 A CN 1711967A CN 200510079126 CN200510079126 CN 200510079126 CN 200510079126 A CN200510079126 A CN 200510079126A CN 1711967 A CN1711967 A CN 1711967A
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Abstract
Projection data are obtained by using a method for imaging by rotating the first imaging system having an X-ray generating unit 1 a and the second imaging system having an X-ray generating unit 1 b. The obtained projection data are subjected to a reconstruction process to generate X-ray image data. In this case, a relative angle eta 0 formed between the imaging systems is setup according to a palmic period T 0 of a subject and a rotation velocity Vr of the imaging systems. Thus, the projection data from more directions at a predetermined palmic time-phase are collected without overlapping.
Description
Technical field
The present invention relates to radiodiagnosis device and X ray image capture method, particularly the data for projection that rotational x-ray production part and X ray detection part are obtained reconstructs, and generates the radiodiagnosis device and the X ray image capture method of X ray picture view data.
Background technology
Use radiodiagnosis device MRI (magnetic resonance imaging: nuclear magnetic resonance) device, perhaps the diagnostic imaging for medical use technology of X ray CT (computed tomography) device etc. has been indispensable technology in the medical treatment of today along with the development of computer of the seventies in last century is progressive rapidly.
Radiodiagnosis is in recent years along with the development of probe skill and technique is that progress has been obtained at the center with the blood circulation field.The radiodiagnosis device of blood circulation diagnosis usefulness possesses usually: X ray production part and X ray detection part, the maintaining body that keeps them, bed platform (top board) and Signal Processing Element.In addition, maintaining body uses C type arm or Ω type arm, by with the bed platform combination of top board single arm method, can carry out the X ray shooting from optimum position and angle to patient (below, be called subject).
The detector that uses in the X ray detection part of radiodiagnosis device had used X-ray film and I.I. (image multiplier) in the past.In the X ray image capture method that uses this I.I., with the x-ray bombardment subject that produces from the X-ray tube of X ray production part, with see through this moment the X ray data for projection that subject obtains (below, be called data for projection) in I.I., be transformed to optical imagery, and then, at this optical imagery with X ray TV camera and be transformed to electric signal.Then, the data for projection that is transformed to electric signal is displayed on the monitor after the A/D conversion.Therefore, use the image capture method of I.I. can carry out the impossible real-time shooting that realizes in film mode, in addition, because can in digital signal, collect data for projection, so can carry out various Flame Image Process.
On the other hand, the method for above-mentioned I.I. instead, the area detectors arranged of 2 dimensions receive publicity in recent years, and its part has entered into the stage of practicability.Proposed the X ray detection part and the X ray production part that possess this area detector relatively are fixed on the maintaining body (C arm), with the axle with the health axle almost parallel of subject is that the center is while rotating the method (for example, with reference to TOHKEMY 2002-263093 communique) of collecting data for projection.
In the method in being documented in TOHKEMY 2002-263093 communique, with the X ray of the X ray production part that rotates, use the area detector of the X ray detection part at the rear that is configured in subject to carry out the detection of transmitted X-rays amount from a plurality of direction sequential illumination cone-shaped beam shapes (being extended to the beam shapes of 2 dimensions) of subject.Then, generate data for projection from the transmitted X-rays amount that obtains, and then, reconstruct processing at this data for projection, generate 3 dimension data (below, be called volume data (volume data)).
In addition, following method has been proposed also: a plurality of camera systems that possess X ray production part and X ray detection part are set, by making their rotations simultaneously around subject, shorten the acquisition time (for example, with reference to Japanese kokai publication hei 10-234717 communique) of above-mentioned data for projection.
, the rotary speed of the camera system in the above-mentioned radiodiagnosis device normally 40 degree/seconds to 60 degree/seconds, for example, when fan-shaped angle be 20 the degree situations under, the needed time is 3 seconds to 5 seconds in the rotation of 180 degree+fan-shaped angles.Collect when the camera system that use has such velocity of rotation under the situation of data for projection of heart etc. of slewing area of 180 degree+fan-shaped angles, because the heartthrob number is from 1 time/second to 2 times/second, so during above-mentioned slewing area rotation, heart carries out 3 times to 10 times beating in camera system.
Promptly, because the relative heartthrob of the velocity of rotation of camera system is fast inadequately, thus data for projection in different heart beating time phase of heart collected, thereby, by using reconstructing of these data for projection to handle in the volume data that obtains, produce kinetic pseudomorphism because of heart.For such problem, in above-mentioned patent documentation 1 and patent documentation 2, do not record and narrate its solution.
On the other hand, as image capture method to the internal organs of as heart, periodically beating, known have a synchronous method of heart beating, especially by collect data for projection in smaller expansion latter stage of the motion of internal organs or end-systole, can generate the better view data that reconstructs.
But, the expansion latter stage that the motion of heart is few and end-systolic during heart beat cycle about 30% only, during remaining 70%, can not collect data for projection.Therefore because use the data for projection from the direction that is restricted to reconstruct processing, so produce significant pseudomorphism in the volume data that obtains, diagnosis capability reduces significantly.
Figure 17, Figure 18 and Figure 19 are the figure that is used to illustrate the problems referred to above.And then, Figure 17 shows that the heart beating of adopting in the past is with the periodic figure of data collection in the data for projection collection of footwork, Figure 18 shows employing heart beating in the past shown in Figure 17 figure with the position relation of X ray production part in the data for projection collection of footwork and X ray detection part, and Figure 19 is the figure of the radiation position of the X ray during displaying employing heart beating in the past shown in Figure 17 is collected with the data for projection of footwork.
Figure 17 show the expansion T11 in latter stage that sets according to the R ripple (R1, R2, R3......) of electrocardiographic wave (below, be called ECG (electrocardiogram) signal), the x-ray bombardment timing t 1 among T12, the T13...... to t3, t4 to t6, t7 to t9 ....
On the other hand, be set at X ray production part in the camera system of radiodiagnosis device and X ray detection part as shown in figure 18, clip subject and dispose relatively, and then the speed with regulation around this subject rotated.Thereby as shown in figure 18, the X ray production part is positioned at A1 to A3 in the x-ray bombardment timing t 1 to t3 of Figure 17.Then, to the X ray detection part radiation X ray relative with A1 to A3 position.
Equally, as shown in figure 19, with R2, the R3 of ECG signal ... the x-ray bombardment timing t 4 among expansion T12 in latter stage, the T13...... of setting is to t6, t7 to t9, and the X ray production part that is positioned at A4 to A6, A7 to A9 is to X ray detection part radiation X ray.
For example, under the situations that fan-shaped angle φ 0 are set to 20 degree, needed slewing area θ 0 is 200 degree in the collection of data for projection, this slewing area θ 0 about 30% in collect the expansion data for projection in latter stage.Thereby, Yi Bian, in above-mentioned slewing area θ 0, collect 60 data for projection on one side for example with 1 degree unit the camera system rotation being collected under the situation of data for projection.Promptly, expanding the data for projection in latter stage in a collection reconstructs under the situation of processing, this data number reduces significantly, and because can obtain these data unequal interval, so handling the pseudomorphism that generation can not be allowed in the volume data that obtains and the view data by reconstructing.
Summary of the invention
The present invention proposes in view of such problem, it is a kind of by using a plurality of camera systems that its purpose is to provide, data for projection from the heart time phase place of more direction collection regulation is by reconstructing radiodiagnosis device and the X ray image capture method that processing can generate the radioscopic image data of high image quality to these data for projection that obtain.
In order to address the above problem, radiodiagnosis device of the present invention possesses: the heartbeat message collector unit of collecting the heartbeat message of subject; In the official hour phase place of above-mentioned heartbeat message, above-mentioned subject is carried out the irradiation and the detection of X ray, collect a plurality of image units of data for projection; Make each camera system mobile unit that around above-mentioned subject, moves of above-mentioned a plurality of image units; Control the camera system mobile control unit that moves of above-mentioned a plurality of image units; Thereby above-mentioned data for projection is reconstructed the image data creating unit of handling generation radioscopic image data.
In addition, radiodiagnosis device of the present invention possesses: subject is carried out the irradiation and the detection of X ray, collect a plurality of image units of data for projection; The camera system mobile unit that above-mentioned a plurality of image unit is moved with same translational speed in fact around above-mentioned subject; Set the camera system mobile control unit of the relative angle of above-mentioned a plurality of image unit formation according to above-mentioned translational speed; Above-mentioned data for projection is reconstructed processing, generate the image data creating unit of radioscopic image data.
On the other hand, X ray image capture method of the present invention has: the step of collecting the heartbeat message of subject; Around above-mentioned subject, control moving of a plurality of image units, collect the above-mentioned heartbeat message step of the data for projection in the phase place at the appointed time; Above-mentioned data for projection is reconstructed processing, generate the step of radioscopic image data.
In addition, X ray image capture method of the present invention has: the step of collecting the heartbeat message of subject; According to the translational speed and the above-mentioned heartbeat message of a plurality of image units on every side that are configured in above-mentioned subject, set the step of the relative angle of above-mentioned a plurality of image units; Make above-mentioned a plurality of image units collect the above-mentioned heartbeat message step of the data for projection in the phase place at the appointed time on one side moving around the above-mentioned subject on one side; Above-mentioned data for projection is reconstructed processing, generate the step of radioscopic image data.
If employing the present invention then can be collected in data for projection the regulation heart time phase place expeditiously from more direction, can handle the view data that generates good image quality by having used reconstructing of these data for projection.
Description of drawings
Fig. 1 is the figure that shows the camera system of the radiodiagnosis device in the embodiments of the invention.
Fig. 2 is the figure that shows the rotation direction of camera system shown in Figure 1.
Fig. 3 is a block diagram of showing all formations of radiodiagnosis device shown in Figure 1.
Fig. 4 is the figure that shows the formation example the when X-ray detector that 2 dimensions are set constitutes X ray detection part shown in Figure 3.
Fig. 5 is the figure that shows the rotation direction of a side's shown in Figure 1 X ray production part and X ray detection part.
Fig. 6 is the figure that shows the rotation direction of another X ray production part shown in Figure 1 and X ray detection part.
Fig. 7 is the figure that shows the slewing area of X ray production part shown in Figure 1.
Fig. 8 shows the expansionary phase of heart beat cycle and the figure of left ventricular volume change curve in the systole and ECG signal.
Fig. 9 is the figure of relation that shows the heart time phase place when relative angle to 2 camera systems shown in Figure 1 carries out optimization and be set at the turned position of the X ray production part in each camera system.
Figure 10 is the figure that shows the turned position that is set at the X ray production part in each camera system when relative angle to 2 camera systems shown in Figure 1 carries out optimization.
Figure 11 is the figure that shows not the turned position that is set at the X ray production part in each camera system when relative angle to 2 camera systems shown in Figure 1 carries out optimization.
Figure 12 shows the flow chart that generates the order of view data with radiodiagnosis device shown in Figure 1.
Figure 13 is the figure of another object lesson that shows the turned position of the X ray production part when relative angle to 2 camera systems shown in Figure 1 carries out optimization.
Figure 14 is the figure of relation that shows by the rotation zero hour of changing 2 camera systems shown in Figure 1 heart time phase place the when displacement of each camera system and relative angle carried out optimization and be set at the turned position of the X ray production part in each camera system.
Figure 15 is the figure that shows the turned position that is set at the X ray production part in 2 camera systems shown in Figure 14.
Figure 16 is illustrated in to make the mobile control of 2 camera systems shown in Figure 1 be easy to simultaneously the figure of the turned position of the X ray production part when the data capture range has been carried out optimization.
Figure 17 is illustrated in employing heart beating in the past with the periodic figure of data collection in the data for projection collection of footwork.
Figure 18 is illustrated in to adopt heart beating in the past shown in Figure 17 figure with the position relation of X ray production part in the data for projection collection of footwork and X ray detection part.
Figure 19 is illustrated in to adopt heart beating in the past shown in Figure 17 figure with the radiation position of the X ray in the data for projection collection of footwork.
The specific embodiment
Below, with reference to the description of drawings embodiments of the invention.
The embodiments of the invention of the following stated are characterised in that: use the radiodiagnosis device of the plane type with 2 camera systems, set the relative angle of the intersecting angle definition of the shooting central shaft (axle at the center of connection X ray production part and the center of X ray detection part) that has separately with above-mentioned 2 camera systems according to the heartbeat message that obtains from subject.
1. Zhuan Zhi formation
Formation with Fig. 1 to Figure 11 explanation radiodiagnosis device in an embodiment of the present invention.Fig. 1 is the figure that shows the camera system of radiodiagnosis device in an embodiment of the present invention, and Fig. 2 is the figure that shows the rotation direction of camera system shown in Figure 1, and Fig. 3 is a block diagram of showing all formations of radiodiagnosis device shown in Figure 1.
Radiodiagnosis device in the present embodiment possesses as shown in Figure 1: have the X ray production part 1a of the not shown subject configuration that clips on the top board 17 that is placed on the platform and the 1st camera system of X ray detection part 2a; The 2nd camera system with X ray production part 1b and X ray detection part 2b, these X ray production parts 1a, 1b and X ray detection part 2a, 2b are fixed near the end of independently the 1st maintaining body 5a and the 2nd maintaining body 5b.Then, as shown in Figure 2, above-mentioned the 1st camera system and the 2nd camera system are being rotated with fixing speed Vr in the same one side of the length direction approximate vertical of top board.
In addition, radiodiagnosis device 100 possesses: generate volume data to reconstructing with X ray detection part 2 detected data for projection to handle, and then, from the image calculation memory unit 7 of 2 dimensional data images such as these volume data generation 3 d image data and MPR (Multi-Planar Reconstruction) view data; The display unit 8 that shows these view data; Carry out the input of subject information and various instructions, and then carry out the functional unit 9 of the setting of imaging conditions and the selection of image display mode etc.; Subject 150 is collected the ECG unit 10 of ECG signal; Above-mentioned each the unitary system control component 11 of master control.
X ray production part 1a and 1b possess: to the X-ray tube 15 of subject 150 irradiation X ray; X ray from X-ray tube 15 irradiations is formed the X ray aperture device 16 of X plumb bob (cone-shaped beam).X-ray tube 15 is the vacuum tubes that produce X ray, quickens to impact the tungsten anode from negative electrode (filament) electrons emitted with high voltage and produces X ray.In addition, X ray aperture device 16 has the function of range of exposures that the X-ray beam from X-ray tube 15 irradiation is focused on the prescribed level of X ray detection part 2 between X-ray tube 15 and subject 150.
Below, X ray detection part 2a and 2b have and use as the mode of the X ray I.I. of an example of the X-ray detectors of 2 dimensions of having narrated and use 2 dimensions to arrange the mode etc. of the so-called X ray area detector of x-ray detection devices (2 dimension array type X-ray detector).
Fig. 4 is the figure that shows the formation example when 2 dimension array type X-ray detectors being set constituting X ray detection part 2a, 2b shown in Figure 3.
As shown in Figure 4, X ray detection part 2a, 2b can also possess with the lower part: known usefulness is arranged in the detecting element detection X ray of 2 dimension shapes and is transformed to 2 dimension array type X-ray detectors 50 of electric signal; Be collected in each detecting element as the detected X ray of electric signal and detect data, implement needed processing such as A/D conversion and logarithmic transformation and generate DAS (the data acquisition system: data collecting system) 51 of data for projection.
But, X ray detection part 2a, the 2b of the mode of having used X ray I.I. is described following.But the constituted mode of X ray detection part 2a, 2b is not limited to this mode, can certainly be other modes that comprise the mode of 2 dimension array type X-ray detectors 50 as shown in Figure 4.
That is, X ray detection part 2a and 2b possess X ray I.I.21, X ray video camera 22, A/D changer 23.Then, X ray I.I.21 is transformed to visible light to the X ray that has seen through subject 150, and then the multiplication of carrying out brightness in the process of light-electronics-light conversion forms the good data for projection of sensitivity.On the other hand, X ray video camera 22 uses CCD, and (Charge Coupled Device: charge-coupled image sensor) imaging apparatus is transformed to electric signal to above-mentioned optical data for projection, and A/D changer 23 is transformed to digital signal to the electric signal (video signal) of the time series of exporting from X ray video camera 22.
Below, mechanism components 3 has: according to the rotational angular velocity of the heart beat cycle T0 that obtains from subject 150 and these camera systems (below, be called velocity of rotation) Vr, calculate the central shaft of the 1st camera system that possesses X ray production part 1a and X ray detection part 2a around subject 150 and the relative angle calculating unit 31 of central shaft angulation (relative angle) η 0 of the 2nd camera system that possesses X ray production part 1b and X ray detection part 2b.
And then, mechanism components 3 possesses: when setting the initial position of above-mentioned the 1st camera system and the 2nd camera system according to the value of the relative angle that calculates with relative angle calculating unit 31, generate the camera system mobile control unit 32 be used for making the mobile control signal that these camera systems rotate under the velocity of rotation Vr of the regulation under the state of keeping above-mentioned relative angle η 0; Move control signal is rotated the 1st camera system and the 2nd camera system around detected body parts 33a of camera system travel mechanism and 33b according to this.In addition, above-mentioned camera system mobile control unit 32 has the position of the above-mentioned camera system of rotating (below, be called the turned position) information is offered the function of system control component 11 described later.
And then, camera system mobile control unit 32 is according to the control signal that provides from system control component 11, be provided for the control signal that the 1st camera system and the 2nd camera system move to subject health direction of principal axis to the parts 33a of camera system travel mechanism and 33b, parts 33a of camera system travel mechanism and 33b are by making above-mentioned camera system move to the health direction of principal axis according to this control signal, can set or upgrade the position of the section of collecting data for projection, but following omission and the axial mobile relevant explanation of health.
Fig. 5 is the figure that shows the rotation direction of a side's shown in Figure 1 X ray production part 1a and X ray detection part 2a, and Fig. 6 is the figure that shows the rotation direction of the opposing party's shown in Figure 1 X ray production part 1b and X ray production part 2b.
That is, Fig. 5 shows X ray production part 1a and the X ray detection part 2a that rotates by the parts 33a of camera system travel mechanism.By being mounted the parts 33a of camera system travel mechanism atop, X ray production part 1a and X ray detection part 2a are that rotate on the R1 direction at the center with the axle with the health direction of principal axis almost parallel of subject 150.On the other hand, Fig. 6 shows X ray production part 1b and the X ray detection part 2b that rotates by the parts 33b of camera system travel mechanism.By being installed in the parts 33b of camera system travel mechanism on the stand, above-mentioned X ray production part 1b and X ray detection part 2b are that rotate on the R2 direction at the center with the axle with the health direction of principal axis almost parallel of subject 150.
Fig. 7 is the figure that shows the slewing area of X ray production part shown in Figure 1.
The slewing area θ 0 of X ray production part 1a during data for projection that Fig. 7 exhibiting collection bottom line in reconstructing processing needs is that the minimum rotation range Theta 0 of the X ray production part 1a in the collection of data for projection of purpose is 180 degree+fan-shaped angle φ 0 reconstructing with image generally.And then above-mentioned fan-shaped angle φ 0 determines according to the radiation angle of the X ray that radiates from X ray production part 1a as shown in Figure 7.By X ray production part 1a and not shown X ray detection part 2a are rotated in above-mentioned slewing area θ 0, can be collected in subject 150 region-of-interest reconstruct require in the processing from 180 the degree directions data for projection.
And then, in Fig. 1, Fig. 5 and Fig. 6, showed that the central shaft Ca that possesses X ray production part 1a and the 1st camera system of X ray detection part 2a is the situations of 90 degree roughly with having relative angle that the central shaft Cb of X ray production part 1b with the 2nd camera system of X ray detection part 2b become, and this relative angle that works as already described sets arbitrarily according to the heartbeat message of subject 150.Based on the setting of the above-mentioned relative angle of heartbeat message is most important part in the present embodiment in proper order, will describe in detail in the back.
Return Fig. 3, high voltage production part 4 possesses in order to quicken the thermoelectron that produces from the negative electrode of X-ray tube 15: produce the high-tension high voltage generator 42 that is applied between anode and the negative electrode; According to index signal, carry out the high voltage control circuit 41 of condition control of the x-ray bombardment of tube current, tube voltage, irradiation time etc. in high voltage generator 42 from system control component 11.
On the other hand, image calculation memory unit 7 possesses data for projection memory circuit 71, image calculation circuit 72, image data storage circuit 73.Then, the 1st camera system and the 2nd camera system are rotated around subject on one side carry out the X ray shooting on one side, data for projection and this camera position information (that is the rotation position information of X-ray producer 1a and 1b) that obtains this moment in X ray detection part 2a and X ray detection part 2b together temporarily are kept in the data for projection memory circuit 71.
Then, image calculation circuit 72 is read data for projection and its rotation position information of the subject 150 that is stored in the data for projection memory circuit 71, reconstructs and handles and the generation volume data.And then above-mentioned image calculation circuit 72 uses the volume data that obtains to generate desirable 3 d image data and 2 dimensional data images.Then, the 3 d image data of image data storage circuit 73 preservation usefulness image calculation circuit 72 generations and 2 dimensional data images etc.And then it is known that the method for formation of above-mentioned volume data reconstructs method because of the image as X ray CT device, so omit detailed explanation.
And then image calculation circuit 72 uses above-mentioned volume data for example to adopt volume (volume) composition method to generate the 3 d image data and adopts MPR method or MIP (Maximum-Intensity-Projection) method to generate 2 dimensional data images.
Below, display unit 8 is the unit that are used for showing the above-mentioned view data of the image data storage circuit 73 that is stored in image calculation memory unit 7, possess: synthetic these view data, as the numeral of its additional information and various literal etc., the demonstration that generates display image data is with data generative circuit 81; Above-mentioned display image data is carried out D/A conversion and TV format conversion, generate the change-over circuit 82 of video signal; The monitor 83 that shows this video signal.
In addition, functional unit 9 is the interactive interfaces that possess input equipments such as keyboard, tracking ball, operating grip, mouse and display panel or various switches etc.Then, in functional unit 9, carry out the input of subject information and various instructions, to the selection of the setting image display mode of imaging conditions such as the velocity of rotation of the x-ray bombardment condition of the bests of shooting object internal organs and camera system and camera position etc.And then, the irradiation time of the tube voltage that is applied on the X-ray tube 15, tube current, X ray etc. is arranged as above-mentioned x-ray bombardment condition, there is 3 d image to show MIP pictorial display, MPR pictorial display etc. as image display mode.
On the other hand, ECG unit 10 receive from the not shown electrode detection of the chest that is installed in subject 150 to the ECG signal, be transformed to digital signal.
Then, system control component 11 possesses not shown CPU (Central Processingunit) and memory circuit, will be kept at the above-mentioned memory circuit from the above-mentioned various information of functional unit 9 inputs or setting by the operator.Then, above-mentioned CPU is according to these information master control high voltage production parts 4, X ray detection part 2a and 2b, mechanism components 3, image calculation memory unit 7, and then also carries out each the unitary control of display unit 8 and the integral body control of system.
Particularly in the present embodiment, in order to set the relative angle η 0 of the 1st camera system and the 2nd camera system, system control component 11 offers the information of the velocity of rotation Vr of the ECG signal of the subject 150 that provides from ECG unit 10 and predefined camera system the relative angle detection part 31 of mechanism components 3.
And then, system control component 11 for example preestablishes a plurality of x-ray bombardments position of X ray production part 1a, under the situation of the rotation position information of the X ray production part 1a that the camera system mobile control unit 32 from mechanism components 3 provides and above-mentioned x-ray bombardment position consistency, the driving signal that is used to shine X ray is offered the high voltage control circuit 41 of high voltage production part 4.
Below, the setting order of the relative angle η 0 of the 1st camera system that said mechanism parts 3 carry out and the 2nd camera system is described with Fig. 8 to Figure 10.
And then, Fig. 8 is the figure that is illustrated in the expansionary phase of heart beat cycle and left ventricular volume change curve in the systole and ECG signal, Fig. 9 is the figure of relation that shows the heart time phase place when relative angle to 2 camera systems shown in Figure 1 has carried out optimization and be arranged on the turned position of the X ray production part in each camera system, and Figure 10 is the figure that shows the turned position that is arranged on the X ray production part in each camera system when relative angle to 2 camera systems shown in Figure 1 has carried out optimization.
As mentioned above, for the internal organs of periodically beating, wish to carry out the collection of data for projection at smaller expansion latter stage or the end-systole of its motion.Fig. 8 shows that a left side feels concerned about the figure of the volume-variation curve a and the ECG signal b of system, is systole from the R ripple of ECG signal to the T ripple, is expansionary phase from this T ripple to next R ripple.Then, its left ventricular volume changes minimum in expansion T1 in latter stage or end-systole T2.
That is, by the data for projection of collecting is reconstructed processing, can generate the good volume data and the view data of the influence that has suppressed motion in the expansion T1 in latter stage of heart movement minimum or end-systole T2.Below, the situation of collecting data for projection in expansion T1 in latter stage is described, but end-systole T2 also can.
Fig. 9 shows the time, promptly with respect to the X ray production part 1a of time phase (transverse axis) of ECG signal and the turned position (longitudinal axis) of 1b.But in the figure for the purpose of simplifying the description, in expansion T11 in latter stage, T12, T13......, X ray production part 1a and 1b carry out x-ray bombardment on 3 different turned positions.
On the other hand, Figure 10 is corresponding with Fig. 9, be illustrated in not shown subject 150 around carry out the X ray production part 1a of x-ray bombardment and the turned position of 1b.But, in the figure,, show the situation that X ray production part 1a and X ray production part 1b rotate along different circumference Ga and Gb, but in fact X ray production part 1a and 1b rotate on same circumference with fixing speed Vr in order to understand easily explanation.
As Fig. 9 and shown in Figure 10, in the t=t1 (with reference to Figure 12) of expansion T11 in latter stage, X ray production part 1a is positioned on the A1 of turned position, in addition, X ray production part 1b is positioned on the B1 of turned position, and the relative angle of the 1st camera system and the 2nd camera system is set at the relative angle η 0 that calculates in the relative angle calculating unit 31 of mechanism components 3.Under the state of keeping this relative angle η 0 in the t=t4 to t6...... of t=t2 and t3, expansion T12 in latter stage, X ray production part 1a is by turned position A2 and A3, A4 to A6......, and X ray production part 1b is by turned position B2 and B3, B4 to B6.
And then, it is desirable to the 1st camera system and the 2nd camera system is adjacent as far as possible, but in fact, interfere because of the size of X ray production part 1a and 1b, X ray detection part 2a and 2b, keeping arm 5a and 5b and shape etc. produce, thereby the relative angle η 0 between camera system is set at 50 degree usually between 90 degree.Therefore in the present embodiment, for example, make that the turned position B1 to B3 of X ray production part 1b is in the turned position A4 to A6 of the X ray production part 1a among the expansion T12 in latter stage and expands between the turned position A7 to A9 of the X ray production part 1a among the T13 in latter stage in expansion T11 in latter stage as Fig. 9 and the setting of carrying out relative angle η 0 shown in Figure 10.
In this case, X ray production part 1b is rotated between turned position A3 and turned position A4.Therefore,, keep the seriality of the data for projection that obtains with the 1st camera system and the 2nd camera system, and then prevent unwanted radiation subject 150 by stop the x-ray bombardment of X ray production part 1a at turned position A1 to A3 place.
But, in this case, because between turned position A3 and turned position A4, do not carry out the collection of data for projection, so the slewing area θ 0 of data for projection camera system need only increase relative angle.Thereby the rotational angle θ 0 of data for projection camera system is configured to more than or equal to θ 0=180 degree+fan-shaped angle+relative angle η 0, and smaller or equal to the maximum angle that can set.And then the maximum angle that can set depends on the mechanical rotational travel of the 1st camera system and the 2nd camera system and determines.For example, rotational angle θ 0 is set to θ 0=180 degree+fan-shaped angle+relative angle η 0.
Below, the computational methods of the relative angle η 0 that the relative angle calculating unit 31 by mechanism components 3 carries out are described.When the velocity of rotation of the 1st camera system that offers relative angle calculating unit 31 and the 2nd camera system is set to Vr (degree/second), the heart beat cycle of subject 150 is set under the T0 situation of (second), and relative angle η 0 can use following formula (1) to calculate.
η0＝{(2n-1)/2}·Vr.T0 ......(1)
Wherein n is an integer.
And then, as shown in figure 10, under the situation between the turned position A4 to A6 of the X ray production part 1a of the turned position B1 to B3 of X ray production part 1b in expanding T11 in latter stage in expansion T12 in latter stage and the turned position A7 to A9 of the X ray production part 1a among the expansion T13 in latter stage, Integer n in formula (1) is n=2, and be under the situation between the turned position A4 to A6 of the turned position A1 to A3 of the X ray production part 1a among the expansion latter stage T11 and the X ray production part 1a among the expansion T12 in latter stage n=1.
On the other hand, Figure 11 is the figure that shows not the turned position that is set at the X ray production part in each camera system when relative angle to 2 camera systems shown in Figure 1 carries out optimization.
That is, Figure 11 showed turned position A1, A2, A3...... and X ray production part 1b under the 1st camera system of the predefined relative angle η of the average heart beat cycle Tx x before the shooting of for example using according to subject 150 and the situation that the 2nd camera system is collected data for projection, X ray production part 1a turned position B1, B2, B3 ....In this case, when the heart beat cycle T0 that is making a video recording of subject 150 changed big situation with respect to the heart beat cycle Tx before the shooting under, X ray production part 1a and X ray production part 1b might shine X ray on same turned position.Therefore, be difficult to collect expeditiously from multidirectional data for projection.
But, when the heart beat cycle T0 and the above-mentioned heart beat cycle Tx of subject 150 relatively do not have under the situation of big difference, can also use relative angle η x according to the predefined camera system of velocity of rotation Vr of the information of this heart beat cycle Tx and camera system.
2. the genesis sequence of view data
Below, use Fig. 1 to Figure 12 that the genesis sequence of view data of the radiodiagnosis device 100 of present embodiment is described.And then Figure 12 shows the flow chart that generates the order of view data with radiodiagnosis device shown in Figure 1.
The operator in functional unit 9, import the subject information relevant with subject 150 and to the velocity of rotation Vr of x-ray bombardment condition, the 1st camera system and the 2nd camera system and relatively the axial camera position of health carry out initial setting, and then also to turned position A1, the A2 of X ray production part 1a, A3 ... the various imaging conditions that wait (the step S1 of Figure 12) carry out initial setting, and these are imposed a condition is kept in the memory circuit of system control component 11.
If above-mentioned initial setting finishes, then the operator installs the electrode of ECG unit 10 at the chest of subject 150.Then, after in a single day ECG unit 10 is transformed to digital signal to the ECG signal of the subject 150 that obtains this moment, then offer system control component 11, the velocity of rotation Vr of the camera system that system control component 11 is set above-mentioned ECG signal with in functional unit 9 offers the relative angle calculating unit 31 (the step S2 of Figure 12) of mechanism's part 3.
Then, the ECG signal measurement R wave spacing or the beats that provide from ECG unit 10 of 31 pairs of relative angle calculating units obtained heart beat cycle T0.And then, use this heart beat cycle T0 and above-mentioned camera system velocity of rotation Vr, for example through type (1) carries out the calculating (the step S3 of Figure 12) of camera system relative angle η 0.
Below, the rotation position information of the X ray production part 1a that the camera system mobile control unit 32 of mechanism components 3 provides according to the relative angle η 0 that provides from relative angle calculating unit 31 with from system control component 11, control camera system parts 33a of travel mechanism and 33b, make X ray production part 1a move to turned position A1 shown in Figure 9, make X ray production part 1b move to turned position B1 (the step S4 of Figure 12) in addition.
If the heartbeat message based on subject 150 is finished by X ray production part 1a and 1b desired location, then the operator imports the sign on of X ray shooting in functional unit 9.Then, begin X ray shooting (the step S5 of Figure 12) by this shooting sign on signal being offered system control component 11.
Below, system control component 11 is a benchmark with the R ripple (R1) of the ECG signal of the subject 150 that provides from ECG unit 10 behind above-mentioned shooting sign on signal, detect the initial x-ray bombardment timing t of expanding in latter stage 1, in this x-ray bombardment timing t 1, carry out x-ray bombardment.But in this case, as having illustrated among Fig. 9, only in X ray production part 1b, carry out x-ray bombardment.
When X ray is made a video recording, the driving signal that is provided in above-mentioned x-ray bombardment timing t 1 by system control component 11 is provided the high voltage control circuit 41 of high voltage production part 4, x-ray bombardment condition control high voltage generator 42 according to having set is applied to high voltage on the X-ray tube 15 of X ray production part 1b.Below, be applied in high-tension X-ray tube 15 and shone X ray to subject 150 via X ray aperture device 16.Then, the X ray that has seen through subject 150 is projected on the X ray I.I.21 of the X ray detection part 2b that is arranged at its rear.On the other hand, X ray I.I.21 is transformed to optical imagery to the X ray that has seen through subject 150, and X ray video camera 22 is transformed to electric signal (video signal) to above-mentioned optical imagery.Below, from X ray video camera 22 is transformed to digital signal according to the video signal of time series output A/D changer 23 after, be kept in the data for projection memory circuit 71 of image calculation memory unit 7.
On the other hand, the camera system mobile control unit 32 of system control component 11 controlling organization parts 3, the 1st camera system and the 2nd camera system are rotated in 150 cycles of subject continuously with predefined velocity of rotation Vr, arrive among the t=t2 of the turned position A2 that stipulates at X ray production part 1a, be provided for the driving signal of x-ray bombardment to the high voltage control circuit 41 of high voltage production part 4.
Below situation with t=t1 the same, in the t=t2 and t=t3 of expansion T11 in latter stage, X ray production part 1b shines X ray on turned position B2 and B3, X ray detection part 2b handle this moment, detected data for projection was kept in the data for projection memory circuit 71 of image calculation memory unit 7.
Below, system control component 11 shines X ray by X ray production part 1a and 1b among the expansion T12 in latter stage of the ECG signal that provides from ECG unit 10.Promptly, if X ray production part 1a that rotates with velocity of rotation Vr and 1b reach predefined turned position A4 to A6 and turned position B4 to B6 latter stage in expansion among the T12, then system control component 11 is provided for the driving signal of x-ray bombardment to the high voltage control circuit 41 of high voltage production part 4, by X ray production part 1a and 1b irradiation X ray.Then, X ray detection part 2a and 2b are kept at the data for projection that obtains this moment in the data for projection memory circuit 71.
Below same, system control component 11 is at R ripple (R3), R ripple (R4) with the ECG signal that provides from ECG unit 10 ... among expansion T13 in latter stage, the T14...... for benchmark, also use X ray production part 1a and 1b to carry out x-ray bombardment, the data for projection that obtains with X ray detection part 2a and 2b is kept in the data for projection memory circuit 71.
Then, before each slewing area θ 0 of X ray production part 1a and 1b becomes 180 degree+fan-shaped angle+relative angle η 0, continue to carry out the collection (the step S6 of Figure 12) of above-mentioned data for projection at least.
And then, in above-mentioned data for projection memory circuit 71, a plurality of data for projection of collecting when preservation is rotated the 1st camera system and the 2nd camera system also are kept at X ray production part 1a when collecting these data for projection and the rotation position information of 1b accordingly with above-mentioned data for projection.
Order by above explanation, if the collection of the data for projection in slewing area θ 0 and preservation finish, then the image calculation circuit 72 of image calculation memory unit 7 uses data for projection and its rotation position information of being kept in the data for projection memory circuit 71 to carry out process of convolution.And then, data for projection on the grid point of the regulation by 3 on the region-of-interest that is set in subject 150 in imagination dimension grid after this process of convolution of back projection, thereby the volume data in the generation region-of-interest is kept at (the step S7 of Figure 12) in the image data storage circuit 73 to the volume data that obtains.And then, because the method that generates volume data according to the data for projection of being collected by the X ray detection parts with 2 dimension detecting elements is the image restructuring technique of known X ray CT device, so in this detailed.
Below, above-mentioned image calculation circuit 72 uses the volume data that generates by said method, the image display mode of selecting with functional unit 9 according to the operator generates desirable 3 d image data or 2 dimensional data images, and these view data that obtain temporarily are kept at (the step S8 of Figure 12) in the image data storage circuit 73.
On the other hand, system control component 11 is read the view data corresponding with predefined image display mode from image data storage circuit 73, is presented on the display 83 of display unit 8.Promptly, system control component 11 is read the desirable view data that is stored in the image data storage circuit 73, offer the demonstration data generative circuit 81 of display unit 8, the incidental information that the subject information that provides with the synthetic view data that provides from view data generative circuit 73 of data generative circuit 81 with from system control component 11 or imaging conditions etc. are provided, the generation display image data.Below, 82 pairs of above-mentioned display image datas of change-over circuit carry out D/A conversion and TV format conversion, generate video signal and are presented at (the step S9 of Figure 12) on the display 83.
If adopt above-described present embodiment, reconstruct because use the data for projection of in smaller expansion latter stage of the motion of subject or end-systolic heart time phase place, collecting to carry out image, so can reduce the influence of the motion of pulsation.In addition, because being rotated, 2 camera systems setting with the relative angle of regulation carry out the collection of above-mentioned X ray data for projection around subject, so can collect with the short time.
And if then according to present embodiment, relative angle then by setting above-mentioned 2 camera systems according to the heartbeat message and the velocity of rotation of subject, can there be the data for projection that repeatedly is collected in the above-mentioned heart time phase place from more direction, these data for projection that obtained are reconstructed processing, can generate the radioscopic image data of high image quality thus.
More than, embodiments of the invention have been described, but the present invention is not limited to the above embodiments, can be out of shape enforcement.For example, in the above-described embodiment, the heart beat cycle that obtains according to the ECG signal with subject and the velocity of rotation of camera system are carried out the optimization of the relative angle of camera system, but also can set the velocity of rotation Vr of camera system according to the heart beat cycle T0 of the relative angle η 0 of predefined camera system and subject.The commentaries on classics degree speed Vr of this moment can try to achieve with the following formula (2) of change formula (1).
Vr＝{2/(2n-1)}·(η0/T0) ......(2)
Wherein, n is an integer.
But the relative angle η 0 of camera system or the calculating formula of velocity of rotation Vr are not limited to formula (1) or formula (2).
On the other hand, the situation of using 2 camera systems to collect data for projection in the present embodiment has been described, but also can have used the camera system more than 3 or 3, for example, as stereo tube and Flying Focal Spot, also go for having used the situation of a plurality of X ray production parts.And then the focal point interval of stereo tube is normally fixed, but also can be the stereo tube that can change focal point interval.On the other hand, Flying Focal Spot is the technology that is installed in the X ray CT device, distance normally about 1mm between the focus of 2 focuses in this case, and distance is 5cm to 20cm between ideal focus under the situation of present embodiment and be suitable for.
And then, in Figure 10 of present embodiment, the turned position B1 to B3 that has showed the X ray production part 1b among the expansion T11 in latter stage is in the turned position A4 to A6 of the X ray production part 1a among the expansion T12 in latter stage and expands between the turned position A7 to A9 of the X ray production part 1a among the phase T13 not, but is not limited to this.
Figure 13 is the figure of another object lesson that shows the turned position of the X ray production part when relative angle to 2 camera systems shown in Figure 1 has carried out optimization.
For example, by setting the relative angle of little camera system as shown in Figure 13, can be the turned position B1 to B3 of the X ray production part 1b among the expansion T11 in latter stage, be set between turned position A1 to A3 that expands the X ray production part 1a among the T11 in latter stage and the turned position A4 to A6 that expands the X ray production part 1a among the T12 in latter stage, in addition, also can be set in after the expansion T13 in latter stage.For example, under the situation of having used subminiature X ray production part, above-mentioned relative angle might be reduced to about 5 degree.In this case, the X ray production part 1b of the X ray production part 1a of turned position A1 to A3 and turned position B1 to B3 together carries out the irradiation of X ray to subject.And then camera system slewing area is in this case determined by 180 degree+fan-shaped angles.
In addition, also can carry out the collection of data for projection by the turned position A1 to A3 in Figure 10.In this case, the image quality of the view data that obtains has some deteriorations, but because the camera system slewing area is 180 degree+fan-shaped angles, so can reduce the amount of radiation to detected body 150.
And then, by changing the rotation zero hour of 2 camera systems, also can set relative angle.
Figure 14 is the rotation zero hour of showing by change 2 camera systems shown in Figure 1, the heart time phase place the when transfer distance of each camera system and relative angle are carried out optimization and be set at the figure of relation of the turned position of the X ray production part in each camera system.In addition, Figure 15 is the figure that shows the turned position that is set at the X ray production part on 2 camera systems shown in Figure 14.
As Figure 14 and shown in Figure 15, can set relative angle arbitrarily by changing the mobile zero hour, make the mobile beginning of 2 camera systems regularly become the different moment mutually.For example, in heart time phase place T11, the 1st camera system is stopped, only allowing the 2nd camera system rotate.Then, only carry out the irradiation and the detection of X ray with the 2nd camera system.
Below, before the timing of the data collection in heart time phase place T12, for example, make the 1st camera system begin to rotate as the periodic moment t4 of the collection of data at least.Then, after heart time phase place T12, use the 1st camera system and the 2nd camera system both sides to carry out the irradiation and the detection of X ray.
If control the 1st camera system and the 2nd camera system with the parts 33a of camera system travel mechanism, 33b like this, then can suppress the unwanted of the 1st camera system and the 2nd camera system and move, set the relative angle η 0 in moving simultaneously arbitrarily.Then, can be with the slewing area θ 0 of still less camera system, carry out on the space successive more data and collect.
And then, can also regularly set relative angle by the mobile beginning timing and the mobile end that change 2 camera systems simultaneously.In addition, can set the mobile beginning timing of 2 camera systems simultaneously, regularly set relative angle by only changing mobile end.
Thereby identical if the periodic side-play amount of mobile beginning of 2 camera systems and the periodic side-play amount of mobile end are set to, then the slewing area θ 0 of each camera system is also identical as shown in figure 15.But, also can be arranged to mutual difference to the slewing area θ 0 of each camera system.
Below, illustrate that the controlling party that is used for the data capture range is carried out optimized camera system goes.
Figure 16 shows the become figure of turned position of the X ray production part when like that the data capture range being carried out optimization easily of the mobile control make 2 camera systems shown in Figure 1.
As shown in figure 16, regularly regularly in fact be set at identical the mobile beginning of 2 camera systems with mobile end.Thereby 2 camera systems are rotated for 0 time at certain relative angle η with constantly beginning rotation.Move beginning timing and mobile end timing if set so simultaneously, then the control of each camera system becomes very easy.But, in this case, have slewing area θ 0 eclipsed scope and nonoverlapping scope of 2 camera systems.
, the data collection direction that needs in image conversion is the angular range that adds fan-shaped angle on 180 degree mostly.Thereby, as long as by setting camera watch region, make that the rotational angle of camera system is the scope more than or equal to 180 degree+fan-shaped angles at least, do not collect data in addition at camera watch region, just can reduce the irradiation number of times and the irradiation dose of X ray.In addition, can reduce the illuminated amount of subject.
Thereby, control each camera system by the parts 33a of camera system travel mechanism, 33b and in the scope that covers camera watch region, rotate at least.In this case, just enough as long as the slewing area θ of 2 camera systems 0 eclipsed part covers camera watch region.Thereby, by setting the slewing area θ 0 of each camera watch region, for example make that the slewing area θ 0 eclipsed scope of 2 camera systems is camera watch regions as shown in figure 16.
On the other hand, only in camera watch region, carry out x-ray bombardment and detection, in the slewing area θ 0 beyond the camera watch region, do not carry out the irradiation and the detection of X ray.That is, in the mobile zero hour its slewing area θ 0 eclipsed camera system, because be located on the camera watch region when rotating beginning, so carry out the irradiation and the detection of X ray.And in the camera system of opposite side from slewing area θ 0 position overlapped, promptly after moving to camera watch region, carry out the irradiation and the detection of X ray.
Otherwise, in the slewing area θ of 2 camera systems 0 nonoverlapping scope (outside of camera watch region), if the moving of camera system that the front has begun the irradiation of X ray and detected a side then makes the irradiation of X ray and detection stop.This moment, institute was so that carry out the irradiation and the collection of X ray till the rotation end point because overlap (because in camera watch region) for the opposing party's camera system at preceding 2 the slewing area θ 0 of the end point of the θ 0 of slewing area.
If control the turned position and the data collection position of 2 camera systems like this, then can under easy control, the whole directions from 180 degree+fan-shaped angles collect successive data.Therefore can improve image quality.
But, have the gap between the data collection position of 2 camera systems in camera watch region.Thereby, if also carry out data collection and be used for image conversion from the opposite direction of each data collection position, the reduction of the image quality that then can reduction factor causes according to the gap of assembling position.
And then, for relative angle η 0, it is desirable to correspondingly set with beats as mentioned above.Figure 16 carries out the example that 4 secondary data are collected with each camera system in the heart time phase place.In this case, the x-ray bombardment of each camera system regularly might be different mutually.
In above-described embodiment, X ray detection part 2 with X ray I.I.21 has been described, even possess the X ray area detector the is arranged X ray detection part of (2 dimension array type X-ray detector 50) but use as mentioned above, also can obtain same effect.And then, though carried out the collection of ECG signal, also can be other biological information such as left ventricular volume change curve shown in Figure 8 for the heartbeat message that obtains detected body.
And then, illustrated in the above-described embodiment to generate the image by data for projection reconstructed and handled the situation that the volume data that obtains has been carried out 2 dimensional data images such as 3 d image data, MIP view data or MPR view data that the volume composition handles, but be not limited to these.
On the other hand, carry out x-ray bombardment during be not limited to expand latter stage, also can be end-systole.In this case, the x-ray bombardment number of times in each expansion latter stage or the end-systole is not limited to 3 times.And then, in the above-described embodiments, showed the situation of only in expansion latter stage or end-systole, carrying out x-ray bombardment, but also can be while rotating camera system with predetermined distance irradiation X ray, from the data for projection that obtains, be chosen in the data for projection that expansion obtains latter stage and reconstruct processing.In this case, though the x-ray bombardment amount of subject is increased, has the simpler advantage of control method to irradiation.
And then the relative angle detecting unit 31 of the mechanism components 4 in the foregoing description can change and the relative velocity of renewal camera system along with the heartbeat message that provides from ECG unit 10.Therefore, even if the heart beat cycle of subject 150 changes in the shooting process, can not have yet and repeatedly collect data for projection.Equally, by upgrade the translational speed of camera system along with the variation of the heartbeat message in the shooting process, can also not have and repeatedly collect data for projection.
Claims (17)
1, a kind of radiodiagnosis device is characterized in that comprising:
Collect the heartbeat message collector unit of the heartbeat message of subject;
In the stipulated time of above-mentioned heartbeat message phase place, above-mentioned subject is carried out the irradiation of X ray and a plurality of image units of detection and collection data for projection;
Make the camera system mobile unit that moves of above-mentioned a plurality of each comfortable above-mentioned subject of image unit on every side;
Control the camera system mobile control unit that moves of above-mentioned a plurality of image units;
Above-mentioned data for projection is reconstructed processing, generate the image data creating unit of radioscopic image data.
2, radiodiagnosis device according to claim 1 is characterized in that:
Above-mentioned camera system mobile control unit constitutes according to above-mentioned heartbeat message and sets the formed relative angle of above-mentioned a plurality of image unit.
3, radiodiagnosis device according to claim 1 is characterized in that:
Above-mentioned camera system mobile control unit constitutes the translational speed of setting above-mentioned a plurality of image units according to above-mentioned heartbeat message.
4, radiodiagnosis device according to claim 1 is characterized in that:
Above-mentioned camera system mobile control unit is set at fan-shaped angle+formed relative angle of above-mentioned a plurality of image units more than or equal to 180 degree+above-mentioned a plurality of image units to the moving range of above-mentioned a plurality of image units.
5, radiodiagnosis device according to claim 1 is characterized in that:
Above-mentioned camera system mobile control unit constitutes the relative angle of above-mentioned a plurality of image units is set in 5 degree to the scope of 90 degree.
6, radiodiagnosis device according to claim 1 is characterized in that:
Above-mentioned a plurality of image unit constitutes with identical in fact translational speed and moves around above-mentioned subject.
7, radiodiagnosis device according to claim 1 is characterized in that:
Above-mentioned a plurality of image unit is collected above-mentioned data for projection in expansion latter stage of above-mentioned heartbeat message or end-systole.
8, radiodiagnosis device according to claim 1 is characterized in that:
Above-mentioned a plurality of image unit possesses the X-ray detector of 2 dimensions, and above-mentioned image data creating unit constitutes by the above-mentioned data for projection of being collected by the X-ray detector of above-mentioned 2 dimensions is implemented the above-mentioned processing that reconstructs, and generates volume data.
9, radiodiagnosis device according to claim 1 is characterized in that:
Above-mentioned heartbeat message collector unit constitutes the ECG signal of collecting above-mentioned subject as above-mentioned heartbeat message.
10, radiodiagnosis device according to claim 1 is characterized in that:
Above-mentioned camera system mobile control unit is set the formed relative angle of above-mentioned a plurality of image unit by the mobile beginning timing and the periodic at least one side of mobile end of the above-mentioned a plurality of image units of change.
11, radiodiagnosis device according to claim 1 is characterized in that:
Above-mentioned camera system mobile control unit constitutes and regularly regularly is set at the mobile beginning of above-mentioned a plurality of image units identical in fact with mobile end.
12, radiodiagnosis device according to claim 1 is characterized in that:
Above-mentioned a plurality of image unit constitutes: in the moving range of above-mentioned a plurality of image units, only the camera watch region that is set to more than or equal to the fan-shaped angle of 180 degree+above-mentioned a plurality of image units is carried out the irradiation and the detection of X ray.
13, a kind of radiodiagnosis device is characterized in that comprising:
Subject is carried out the irradiation and the detection of X ray, collect a plurality of image units of data for projection;
The camera system mobile unit that above-mentioned a plurality of image unit is moved with same translational speed in fact around above-mentioned subject;
Set the camera system mobile control unit of the formed relative angle of above-mentioned a plurality of image units according to above-mentioned translational speed;
Above-mentioned data for projection is reconstructed processing, generate the image data creating unit of radioscopic image data.
14, radiodiagnosis device according to claim 13 is characterized in that:
Above-mentioned camera system mobile control unit constitutes above-mentioned relative angle is changed in the moving process of above-mentioned a plurality of image units.
15, radiodiagnosis device according to claim 13 is characterized in that:
Above-mentioned a plurality of image unit constitutes the data for projection of collecting the scope that does not overlap mutually.
16, a kind of X ray image capture method is characterized in that comprising:
Collect the step of the heartbeat message of subject;
That controls a plurality of image units around above-mentioned subject moves the step of collecting the data for projection of above-mentioned heartbeat message in the official hour phase place;
Above-mentioned data for projection is reconstructed processing, generate the step of radioscopic image data.
17, a kind of X ray image capture method is characterized in that comprising:
Collect the step of the heartbeat message of subject;
According to the translational speed and the above-mentioned heartbeat message that are configured in above-mentioned subject a plurality of image units on every side, set the step of the relative angle of above-mentioned a plurality of image units;
Above-mentioned a plurality of image unit is moved, Yi Bian collect the above-mentioned heartbeat message step of the data for projection in the phase place at the appointed time around above-mentioned subject;
Above-mentioned data for projection is reconstructed processing, generate the step of radioscopic image data.
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Effective date of registration: 20160720 Address after: Japan Tochigi Patentee after: Toshiba Medical System Co., Ltd. Address before: Tokyo, Japan, Japan Patentee before: Toshiba Corp Patentee before: Toshiba Medical System Co., Ltd. |