CN102378598A - X-ray diagnosis equipment and long-length image generation method - Google Patents
X-ray diagnosis equipment and long-length image generation method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000003745 diagnosis Methods 0.000 title abstract description 6
- 238000012545 processing Methods 0.000 claims abstract description 54
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 238000002594 fluoroscopy Methods 0.000 claims description 78
- 238000012360 testing method Methods 0.000 claims description 61
- 230000002123 temporal effect Effects 0.000 claims description 9
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- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000001915 proofreading effect Effects 0.000 description 2
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- A61B6/5241—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data combining image data of a patient, e.g. combining a functional image with an anatomical image combining images from the same or different ionising radiation imaging techniques, e.g. PET and CT combining overlapping images of the same imaging modality, e.g. by stitching
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Abstract
Provided are an X-ray diagnosis equipment and a long-length image generation method which are used for generating a long-length image while suppressing radiation exposure to an examinee (100). The X-ray diagnosis equipment comprises an X-ray generation unit (60) for irradiating the examinee (100) with X rays, an X-ray detection unit (70) for detecting an X-ray signal based on the X rays passing through the examinee (100), a driving unit (130) for moving an image system including the X-ray generation unit (60) and the X-ray detection unit (70), a position sensor for detecting the position information of the image system, an image processing unit (112) for adding a plurality of fluoroscopic image frames based on the X-ray signals obtained by the X-ray detection unit (70) on the basis of the detected position information to generate a long-length image, and a display unit (80); for displaying the long-length image.
Description
Technical field
The radiodiagnosis device and the rectangular image generating method that the present invention relates to use fluoroscopy images and generate the bar chart picture.
Background technology
The radiodiagnosis device; From X ray generation portion irradiation X ray; Utilize the monitoring of X ray test section to see through the transmitted X-rays of acceptor; Utilize image processing part to based on handling, on display part, show photographic images or fluoroscopy images thus by the X ray signal of the detected transmitted X-rays of X ray test section.
The employed rectangular image generating method of radiodiagnosis device is the image generating method that when showing with the relevant image of large-scale region-of-interest of relating to of acceptor, carries out.In the rectangular image generating method, the positional information of the X ray generation portion when comprising that X ray is taken and the image system of X ray test section is with a plurality of photographic images joints.An image that is engaged is called the bar chart picture, for example is used for the diagnosis of lateral bending disease.Generate bar chart as the time, make the photographic images of obtaining earlier overlapping successively and show.(for example patent documentation 1).
Patent documentation 1: TOHKEMY 2008-17965 communique
Summary of the invention
In patent documentation 1, generate bar chart as the time, must make photographic images repeat a part each other and take.Therefore, the repeating part at photographic images can be shone respectively.It is thus clear that, in patent documentation 1 and the row that shone into that reckons without acceptor suppress.
The object of the present invention is to provide and a kind ofly can suppress being taken of acceptor and generate the radiodiagnosis device and the rectangular image generating method of bar chart picture.
To achieve these goals; A kind of radiodiagnosis device is provided, and it has: be used for to acceptor irradiation X ray X ray generation portion, detect X ray test section, be used to make the drive division that the image system that comprises above-mentioned X ray generation portion and above-mentioned X ray test section moves based on the X ray signal of the X ray that sees through above-mentioned acceptor, the position sensor that detects the positional information of above-mentioned image system, according to detected above-mentioned positional information to a plurality of perspective view picture frames based on the X ray signal that obtains by above-mentioned X ray test section add up (adding) generates the image processing part of bar chart picture, the display part of the above-mentioned bar chart picture of demonstration.In addition; A kind of rectangular image generating method is provided; It is characterized in that, may further comprise the steps: the irradiation X ray and detect step based on the X ray signal of X ray, according to positional information to a plurality of perspective view picture frames based on the X ray signal the add up step that generates the bar chart picture, the step that shows above-mentioned bar chart picture.
The invention effect
According to the present invention, can suppress being taken of acceptor and generation bar chart picture.
Description of drawings
Fig. 1 is the figure of the train of mechanism of expression radiodiagnosis device of the present invention.
Fig. 2 is the integrally-built figure of expression radiodiagnosis device of the present invention.
Fig. 3 is the figure of the action flow chart of expression embodiments of the invention 1～embodiment 4.
Fig. 4 is the curve chart that is used to explain embodiments of the invention 1.
Fig. 5 is the curve chart that is used to explain embodiments of the invention 2.
Fig. 6 is before the expression correction of the present invention and the figure of the bar chart picture after proofreading and correct.
Fig. 7 is the curve chart that is used to explain embodiments of the invention 3.
Fig. 8 is the curve chart that is used to explain embodiments of the invention 4.
Fig. 9 is the figure of structure of the aperture device 62 of expression embodiments of the invention 5.
Figure 10 is the figure of control concrete example of the aperture device 62 of expression embodiments of the invention 5.
Figure 11 is the figure that is used to explain the effect of embodiments of the invention 5.
Figure 12 is the figure of the action flow chart of expression embodiments of the invention 5.
The specific embodiment
Below, the present invention will be described to utilize accompanying drawing.Fig. 1 is the figure that shows the train of mechanism of radiodiagnosis device 1 of the present invention.The detailed content of train of mechanism is for example shown in TOHKEMY 2008-136797.Here, the major part to the train of mechanism relevant with the present invention describes.
Pedestal portion 10 supports the framework of taking platform whole (supporting arm part 20, carriage 30, column sections 50 etc.).Take in the inside of this pedestal portion 10 and to make elevating mechanism that supporting arm part 20 goes up and down with respect to pedestal portion 10 and the rotating mechanism that supporting arm part 20 is rotated with respect to pedestal portion 10.
Supporting arm part 20 is provided with the slide mechanism that carriage 30 is slided on the length direction of carriage 30 with respect to supporting arm part 20.Slide mechanism is not shown in the diagram, and it has: motor, the drive sprocket that under the driving of motor, is rotated, two driven sprockets and with the chain of each sprocket engagement.The both ends of chain are fixed on the fixed part of carriage 30.Rotation through drive sprocket can be seen chain off, consequently, carriage 30 is slided in the longitudinal direction with respect to supporting arm part 20.
Be provided with the top board 40 of placing acceptor 100 on the top of carriage 30.Taking on the platform 1, top board 40 also can constitute with respect to carriage 30 in the longitudinal direction sliding freely.
In the inside of carriage 30, be provided with and make column sections 50 go up the X ray generation portion driving mechanism that slides at the length direction (A direction) of top board 40 and width (B direction) with respect to carriage 30.X ray generation portion driving mechanism is not shown in the diagram, and it has: the drive sprocket that under the motor of a distolateral setting of the length direction of carriage 30, driving at motor, is rotated, at the driven sprocket of another distolateral setting of carriage 30 and the chain that links two sprocket wheels.On chain, be fixed with the basilar part 51 of column sections 50, make the chain rotation through sprocket wheel, can make basilar part 51 thus is that column sections 50 goes up slip at length direction (A direction).In addition, can utilize the X ray generation portion driving mechanism identical mechanism with length direction (A direction) that width (B direction) is also slided.X ray generation portion 60 is linked to the front of column sections 50 and to the equipment of acceptor 100 irradiation X ray.Therefore, through X ray generation portion driving mechanism, can make the X ray generation portion 60 that is linked to column sections 50 go up mobile at length direction (A direction) and width (B direction).
In addition, the set inside at the linking part 53 of column sections 50 has the rotating mechanism that X ray generation portion 60 is rotated on the C direction with respect to linking part 53.Can make the length direction of the direction of illumination deflection top board 40 of X ray.Column sections 50 is extended from basilar part 51 along vertical, and along with towards linking part 53 and on the length direction of carriage 30 and this both direction of width, extend.Therefore, the standing place that can guarantee operator in the both sides of carriage 30 across X ray generation portion 60 can be from the head side of acceptor 100 and these three directions of both sides near acceptor 100.
X ray test section 70 is arranged on the inside of carriage 30.X ray test section 70 constitutes through disposing a plurality of detecting elements with the two-dimensional array shape, is according to the equipment that detects the X ray signal from X ray generation portion 60 irradiation and the amount of incident that sees through the X ray of acceptor 100.X ray test section 70 can also be image intensifier and CCD (charge coupled device: the structure of the imaging plate of the structure of camera or storing X ray signal charge-coupled image sensor).
The X ray test section driving mechanism (not shown) that X ray test section 70 is slided has: slide mechanism is arranged on the inside of carriage 30, and makes X ray test section 70 go up slip with respect to carriage 30 at the length direction (D direction) of carriage 30; And slide mechanism, X ray test section 70 is gone up at the width (E direction) of carriage 30 with respect to carriage 30 slided.X ray test section driving mechanism slides with X ray generation portion 60 mode in opposite directions X ray test section 70 is gone up at the width (E direction) of the length direction (D direction) of carriage 30 and carriage 30.Particularly, X ray test section driving mechanism makes 70 actions of X ray test section with the mode at the center of the optical axis perforation X ray test section 70 of the X ray of X ray generation portion 60.In addition; According to the basilar part 51 and the position sensor (not shown) of X ray test section 70 with respect to the positional information (sliding mode) of carriage 30 that are used to predict column sections 50, execution is used to make X ray test section 70 to be driven in the control that X ray generation portion 60 ground move.This position sensor is generally linear encoder or rotary encoder etc.
Fig. 2 is the integrally-built figure of expression radiodiagnosis device of the present invention.The radiodiagnosis device has: top board 40, place acceptor 100; X ray generation portion 60 is to acceptor 100 irradiation X ray; Aperture device 62 is set the x-ray irradiation area to acceptor 100; High voltage generation portion 108 carries out electric power to X ray generation portion 60 and supplies with; X ray test section 70, be disposed at X ray generation portion 60 position in opposite directions on, and the X ray that sees through acceptor 100 detected; Image processing part 112 carries out Flame Image Process to the X ray signal from 70 outputs of X ray test section; Image storage part 114, storage is from the radioscopic image of image processing part 112 outputs; Display part 80 shows radioscopic image; Drive division 130 drives each driving mechanism of column sections 50 as shown in Figure 1, X ray generation portion 60 and X ray test section 70; Control part 118 is controlled each composed component; And operating portion 120, control part 118 is sent instruction.X ray test section 70 is disposed in the carriage 30.Though image processing part 112, image storage part 114 and drive division 130 are represented by dotted lines, be disposed on the arbitrary parts in pedestal portion 10, supporting arm part 20, carriage 30, column sections 50 and the basilar part 51.
X ray generation portion 60 has from high voltage generation portion 108 and accepts that electric power is supplied with and produce the X-ray tube of X ray.High voltage generation portion 108 is like lower device: the negative electrode that makes electric current flow into the X-ray tube of X ray generation portion 60 is a filament, and this filament is heated to set point of temperature, and producing the anode and the dc high voltage between the negative electrode that put on X-ray tube is tube voltage.Through applying this high voltage, irradiate X ray from X-ray tube.The negative electrode that flows into X-ray tube through control is that the electric current of filament is controlled the anode that flows into X-ray tube and tube current, tube voltage and the shooting time of negative electrode, carries out the control of x-ray dose thus.
112 pairs of X ray signals from 70 outputs of X ray test section of image processing part carry out Flame Image Process, and the radioscopic image after the Flame Image Process is exported.Flame Image Process comprises the expansion of gamma transformation, greyscale transform process, image/dwindle etc.Image storage part 114 will be stored with the name of acceptor 100, sex, age information, temporal information etc. from the radioscopic image of image processing part 112 output.Display part 80 can be with showing as the fluoroscopy images of acceptor 100 or photographic images etc. from the radioscopic image of image processing part 112 output.
In addition; When control part 118 is imported the operation signal of being operated by operating portion 120; Control part 118 calculates ground, ceiling and portion of mechanism distance each other each other one by one according to the positional information of each driving mechanism; And to each driving mechanism output action or the signal that stops, to avoid their contacts.
The embodiment 1 that utilizes fluoroscopy images to generate the bar chart picture is described here.In the present invention, Yi Bian the X ray generation portion 60 of irradiation X ray and the X ray test section 70 that detects the X ray signal are moved mutually drivenly, Yi Bian obtain fluoroscopy images.The control mode of perspective adopts pulsed fluoroscopy.Pulsed fluoroscopy is with pre-set time interval pulsed exposure X ray and the image pickup method taken.Image processing part 112 correspondences comprise that the positional information of the image system of X ray generation portion 60 and X ray test section 70 adds up to the perspective view picture frame based on the X ray signal that is obtained by X ray test section 70, generates the bar chart picture.
When particularly, control part 118 calculates the irradiation primary X-ray according to the interval of the positional information of image system and x-ray bombardment the corresponding amount of movement of image system.In addition, image processing part 112 makes the amount of the amount of movement that the fluoroscopy images vertical shift calculated that obtains successively and adds up, and generates the bar chart picture.Display part 80 shows from the bar chart picture of image processing part 112 outputs.
Use the action flow chart of Fig. 3 to specify embodiment 1.
(step 1)
The examiner selects bar chart as generate pattern from various screening-modes through operating portion 120.In addition, control part 118 will select bar chart to convey to each composed component as the situation of generate pattern.
(step 2)
The examiner sets in order to obtain the drive condition of bar chart as the steady state speed (speed of action) of the direction of action of required image system (X ray generation portion 60 and X ray test section 70), image system through operating portion 120.In addition, control part 118 exports the direction of action of image system, the drive condition of steady state speed to drive division 130.
(step 3)
The examiner sets through operating portion 120, the end of the region-of-interest of the acceptor 100 that makes image system move to will to obtain the bar chart picture, is that image collection begins the place.Control part 118 makes image system move to image collection through drive division 130 to begin the place.For example, use the illumination part (not shown) of representing the x-ray bombardment scope of acceptor 100 through irradiates light.The rayed that makes illumination part is on acceptor 100, on one side the examiner confirms the x-ray bombardment scope, begins the place Yi Bian make image system move to image collection.
(step 4)
(step 5)
When the image collection button of examiner's push portion 120, X ray generation portion 60, X ray test section 70 and image processing part 112 etc. become image collection and begin SBR.In addition, control part 118 calculates the distance till image system becomes steady state speed.Fig. 4 (a) is the curve chart of the relation of speed V (t) and the time T of expression image system.Here, suppose to be (t1) to reaching the time that steady state speed (V1) spent, stop the time that speed (0) spent and be (t5)-(t4) to reaching from steady state speed (V1) from initial velocity (0).Control part 118 calculates the distance till image system becomes steady state speed (V1) according to (V1) * (t1).
(step 6)
According to the indication of control part 118, drive division 130 is that benchmark makes image system move the amount of the distance of (V1) * (t1) laterally with the image collection starting position, makes the image collection starting position become the steady state speed of image system (V1).In Fig. 4 (a), drive division 130 is a benchmark with the image collection starting position, makes image system move the amount of the distance of (V1) * (t1) to the head side of acceptor 100.Location recognition after control part 118 will move as described above is the driving starting position of image system.
(step 7)
In addition; Control part 118 is set the X ray condition according to the steady state speed (V1) of image system to high voltage generation portion 108 and X ray generation portion 60; Wherein, this X ray condition comprises the interval of the X ray of pulsed exposure X ray, tube current, tube voltage and the shooting time etc. of inflow X-ray tube.
Particularly; At steady state speed (V1) is more than the setting under (for example more than the 100mm/s) situation; It is (for example below the 10ms) below the setting that control part 118 makes the interval of the X ray of pulsed exposure X ray, or to make the x-ray dose of every frame fluoroscopy images be setting above (for example more than the 10mAs).On the contrary; At steady state speed (V1) is under the situation of (for example below the 100mm/s) below the setting; The interval that makes the X ray of pulsed exposure X ray is setting above (for example more than the 10ms), or to make the x-ray dose of every frame fluoroscopy images be (for example below the 10mAs) below the setting.In the present embodiment, also can in control part 118, set above-mentioned a plurality of settings in advance.
(step 8)
(step 9)
Particularly, move under the situation of 5mm with respect to every perspective view picture frame at image system, image processing part 112 is through making the perspective view picture frame along squint successively 5mm and adding up of moving direction, and the perspective view picture frame is engaged and generates the bar chart picture.Move under the situation of 10mm with respect to every perspective view picture frame at image system, image processing part 112 is through making the perspective view picture frame along squint successively 10mm and adding up of the moving direction of image system, and the perspective view picture frame is engaged and generates the bar chart picture.Like this, image processing part 112 can engage each perspective view picture frame and generation bar chart picture through coming management position information according to each perspective view picture frame.
Fig. 4 (b) is the curve chart of the relation between number F (t) and the time T that adds up in the expression place that the process random time is had an X-rayed from the image collection starting position.Shown in Fig. 4 (b), from the image collection starting position be the time (t1) to time (t4), the perspective view picture frame is engaged.From the time (t1) to time (t2), the number that adds up of perspective view picture frame increases.When reaching the time (t2), the number that adds up becomes (F1).The number that adds up of the perspective view picture frame of (t3) keeps certain for (F1) from the time (t2) to the time.In addition, from the time (t3) to time (t4), the number that adds up of perspective view picture frame reduces.
(step 10)
The examiner confirms the bar chart picture in engaged stages midway on one side through display part 80, on one side continue push portion 120 the image collection button until the region-of-interest that arrives the acceptor 100 that will obtain the bar chart picture.In addition, the examiner unclamps the image collection button in the action of image system above the moment of region-of-interest.When unclamping the image collection button, control part 118 is identified as image collection to be finished, and high voltage generation portion 108, X ray generation portion 60, X ray test section 70 and image processing part 112 etc. become the image collection done state.
In addition, the examiner also can preestablish the image collection that the collection that makes the perspective view picture frame stops and finishing the place.Particularly; Making image system move to the other end that image collection begins the place through drive division 130 is that image collection finishes the place, and the position sensor of positional information that is used to predict positional information and the X ray test section 70 of X ray generation portion 60 reads this positional information.The positional information of the image system that control part 118 will be read by position sensor is identified as the image collection end position.The positional information of the image system in the control part 118 detection position pick offs, and judge whether image system has arrived the image collection end position.Arrived at image system under the situation of image collection end position, control part 118 is collected end signal to output images such as high voltage generation portion 108, X ray generation portion 60, X ray test section 70, image processing parts 112.High voltage generation portion 108, X ray generation portion 60, X ray test section 70, image processing part 112 etc. become the image collection done state.
(step 11)
The information of pushing (image collection button OFF) according to the image collection button of operating portion 120; Or the positional information of position sensor (image system moves to the image collection end position), control part 118 is to end of output signals such as high voltage generation portion 108, X ray generation portion 60, X ray test section 70, image processing parts 112.High voltage generation portion 108 and X ray generation portion 60 stop to produce X ray, and drive division 130 makes image system stop to move.
Shown in Fig. 4 (a), the translational speed of (t4) image system is slowed down since the time, and image system stopped to move in the time (t5).Shown in Fig. 4 (b), image processing part 112 finishes the joint of perspective view picture frame in the time (t4).Therefore, add up that also (t4) reduces number F (t) gradually from the time (t3) to the time.
(step 12)
The perspective view picture frame is engaged and the number difference that adds up of perspective view picture frame in the bar chart picture that generates in time (t1)～time (t2), time (t3)～time (t4), therefore, look like to be shown in display part 80 as the different bar chart of image color.Here, with the bar chart picture of time (t1)～time (t2), time (t3)～time (t4) bar chart picture as the end.Therefore, the examiner selects whether bar chart is looked like to proofread and correct (the bar chart picture of whether deleting the end) through operating portion 120.Under the situation of the bar chart picture of not deleting the end, release.
(step 13)
Bar chart looked like proofread and correct under the situation of (the bar chart picture of deletion end) being chosen as through operating portion 120, image processing part 112 from whole bar chart picture with the rectangular image-erasing of end.Image processing part 112 through from whole bar chart picture with the rectangular image-erasing of end, the number that adds up that only extracts the perspective view picture frame becomes the bar chart picture of regular hour (t2)～time (t3).Display part 80 can show the uniform bar chart picture of concentration of time (t2)～time (t3).Then, release.
In addition, can omit also that (step 5), (step 6) can make that to drive the starting position consistent with the image collection starting position.Therefore, while the examiner confirms that the x-ray bombardment scope makes image system move to image collection and begins the place, so the visibility of image collection starting position is good.In addition, owing to make the driving starting position consistent, therefore begin to collect fluoroscopy images from driving the starting position with the image collection starting position.Thus, can shorten the rise time of bar chart picture.
Through exporting fluoroscopy images or bar chart pictures from image storage part 114, display part 80 can show fluoroscopy images or bar chart picture.In addition, through from image storage part 114 corresponding together their temporal information that obtains of bar chart picture and fluoroscopy images being exported, display part 80 can be shown in same picture with fluoroscopy images with the bar chart picture.Therefore, the examiner can be with the process that obtains of bar chart picture with confirming.For example, the examiner can confirm the injection situation of contrast agent through fluoroscopy images and bar chart picture.
More than, according to present embodiment, can use fluoroscopy images to generate the bar chart picture, look like to compare with using the photographic images generation bar chart that obtains through the X ray shooting, can suppress being shone of acceptor.
And, according to present embodiment,, many fluoroscopy images generate the bar chart picture owing to being overlapped, therefore can show the little bar chart picture of seam influence.Particularly, because it is many to constitute the image number of bar chart picture,, therefore, can generates and engage the high bar chart picture of precision so can obtain more images information.Thus, the examiner can carry out reliable diagnostic.
And, according to present embodiment, owing to use fluoroscopy images,, therefore, can carry out the diagnosis of a large amount of acceptor 100 such as lateral bending disease inspection diagnosis so x-ray dose is low.
In addition, according to present embodiment, can not make image system stop to generate movably the bar chart picture, therefore, look like to compare with using the photographic images generation bar chart that obtains through the X ray shooting, the short time gets final product.Therefore, can alleviate the burden of acceptor 100.
Then, use Fig. 1～Fig. 5 that embodiment 2 is described.Be with the difference of embodiment 1, receive according to making x-ray dose variable in order further to reduce.
Fig. 5 (a) is that expression begins the curve chart through the relation of add up the number F (t) and the time T in the place of random time from the image collection starting position.Fig. 5 (b) be the expression amount that generates a perspective view picture frame bar chart as the time fluoroscopy images frame number H (t) that adds up mutually and time T the curve chart of relation.
Here, the length of establishing a perspective view picture frame be Lmm (with the moving direction of image system be same direction), the translational speed of image system is V (t) mm/s, the fluoroscopy images frame per second is a f/s (frame/sec).Shine open total fluoroscopy images frame number H (m) of perspective view picture frame (time t (m-1)～t (m)) in the m arbitrarily that constitutes the bar chart picture can be by the formulate of mathematical expression 1.
[mathematical expression 1]
For example, the length L of establishing a perspective view picture frame is that 400mm, speed V are 100mm/s, the total fluoroscopy images frame number H (m) when the fluoroscopy images frame per second is 30f/s, shown in mathematical expression 2.In addition, be the frame number that adds up of only opening the perspective view picture frame by the m of the certain zone formation of F (t).
[mathematical expression 2]
If x-ray dose to a perspective view picture frame irradiation N; Then image system move amount with a perspective view picture frame suitable apart from the time irradiated x-ray dose H (m) is opened the perspective view picture frame add up and draw; Therefore, its total x-ray dose N (m) is shown in mathematical expression 3.
[mathematical expression 3]
N(m)＝H(m)×N
The perspective view picture frame is added up, and shine x-ray doses to acceptor 100 with the amount that adds up.Therefore, in the present embodiment, in order to suppress the photograph that receives of acceptor 100, control part 118 is set at setting (receiving according to higher limit) with the bar chart of the amount of a perspective view picture frame as required total x-ray dose N (m).In addition, control part 118 is calculated the required x-ray dose of every perspective view picture frame as N (m)/H (m).The X ray condition of 118 pairs of high voltage generations of control part portion 108 and X ray generation portion 60 these x-ray doses of setting.
In addition, can at random set setting (receiving) through operating portion 12 according to higher limit.
Then, use Fig. 3 that the action of embodiment 2 is described.Therefore be step 7 with the difference of embodiment 1, description of step 7 only.
(step 7)
In embodiment 1, control part 118 is set the X ray condition according to the steady state speed (V1) of image system to high voltage generation portion 108 and X ray generation portion 60, but can shown in above-mentioned embodiment 2, change.Particularly, control part 118 is redefined for setting (receiving according to higher limit) with the bar chart of the amount of a perspective view picture frame as required total x-ray dose N (m).In addition, control part 118 is calculated the required x-ray dose of every perspective view picture frame as N (m)/H (m).In addition, control part 118 is set the X ray condition according to the x-ray dose of being calculated to high voltage generation portion 108 and X ray generation portion 60, and wherein this X ray condition comprises tube current, tube voltage and the shooting time etc. that flow into X-ray tube.
More than, according to present embodiment, be redefined for setting (receiving) as required total x-ray dose N (m) according to higher limit through bar chart with the amount of a perspective view picture frame, can reduce x-ray dose to acceptor 100 irradiations.
Embodiment 3
Use Fig. 1～3, Fig. 6, Fig. 7 that embodiment 3 is described here.Be with the difference of embodiment 1, embodiment 2, each perspective view picture frame set made the uniform concentration gain of rectangular image color.
Shown in Fig. 6 (a), owing to the number difference that adds up of the perspective view picture frame of the bar chart picture that the perspective view picture frame is engaged generate, so look like to be shown in display part 80 as the different bar chart of concentration.For example, first bar chart picture that begins from the left end of m=1 is only generated by perspective view picture frame 1.In addition, second the bar chart picture that begins from the left end of m=1 generated by perspective view picture frame 1 and perspective view picture frame thereafter 2.The 7th the bar chart picture that begins from the left end of m=1 generated by perspective view picture frame 1～perspective view picture frame 7.
Fig. 7 (a) be the expression amount that generates a perspective view picture frame bar chart as the time fluoroscopy images frame number H (t) that adds up mutually and the relation of time T curve chart.Fig. 7 (b) is the curve chart of the relation of indicated concentration gain G (t) and time T.
[mathematical expression 4]
α＝H(t)×G(t)
Therefore, shown in Fig. 6 (b), the concentration along with the different and different bar chart picture of the number that adds up of perspective view picture frame is kept evenly.
Then use Fig. 3 that the action of embodiment 3 is described.Therefore be step 12, step 13 with the difference of embodiment 1, only description of step 12, step 13.
(step 12)
At this, the examiner selects whether bar chart to be looked like to proofread and correct (whether the concentration gain of bar chart picture being proofreaied and correct) through operating portion 120.Under the situation of the concentration gain of not proofreading and correct the bar chart picture, release.
(step 13)
Bar chart looked like proofread and correct under the situation of (the concentration gain to the bar chart picture is proofreaied and correct) being chosen as through operating portion 120; Image processing part 112 is handled, and the concentration along with the different and different bar chart picture of the number that adds up of perspective view picture frame is kept evenly.Display part 80 can the uniform bar chart picture of display density according to the bar chart picture from image processing part 112 outputs.So, release.
More than, according to present embodiment, can be on display part 80 the uniform bar chart picture of display density, the examiner can carry out reliable diagnostic.
Embodiment 4
Use Fig. 1～3, Fig. 8 that embodiment 4 is described here.Be with the difference of embodiment 1～embodiment 3, can change x-ray dose according to the region-of-interest (for example body is thick) of acceptor 100.
For example, the body of the trunk of acceptor 100 and lower limb portion is thick different.Therefore, at the trunk of acceptor 100 with lower limb portion if obtain fluoroscopy images with identical X ray condition, then the image color of perspective view picture frame might be different.Therefore, control part 120 also can be set the X ray condition to high voltage generation portion 108 and X ray generation portion 60 according to the region-of-interest of acceptor 100.
Particularly, shown in Fig. 8 (b), time (t1)～time (t3 ') is the timing to the trunk irradiation X ray of acceptor 100, and time (t3 ')～time (t4) is the timing to the lower limb portion irradiation X ray of acceptor 100.Here, 120 pairs of high voltage generations of control part portion 108 and X ray generation portion 60 set, and make that in the timing to the trunk irradiation X ray of acceptor 100 be time (t1)～time (t3 ') to become x-ray dose α (mAs).
Here, 120 pairs of high voltage generations of control part portion 108 and X ray generation portion 60 set, and make that in the timing of the lower limb portion of acceptor 100 being shone X ray be time (t3 ')～time (t4) to become x-ray dose β (mAs).
More than, according to the present invention, can make x-ray dose variable according to the region-of-interest (for example body is thick) of acceptor 100.Therefore, can be at the uniform bar chart picture of display part 80 display densities, the examiner can carry out reliable diagnostic.
Embodiment 5
Use Fig. 1, Fig. 2, Fig. 9～12 couple embodiment 5 to describe here.Be with the difference of embodiment 1～embodiment 4: can change x-ray irradiation area (aperture device 62), make x-ray dose become evenly acceptor.
Use Fig. 9～Figure 12 to specify.Fig. 9 is the figure that mainly representes the structure of aperture device 62.Aperture device 62 has a plurality of blades of diaphragm 63～66.Here; When obtaining the perspective view picture frame; It is that the blade of diaphragm 63 of the moving direction of image system moves with blade of diaphragm 64 that aperture device 62 makes the length direction (A direction) that is positioned at top board 40; Can change x-ray irradiation area, make the perspective view picture frame is added up and the x-ray dose of the bar chart picture that obtains becomes evenly acceptor 100.The corresponding amount of movement of the image system when control part 118 calculates irradiation primary X-ray [s1] according to the interval of the positional information of image system and x-ray bombardment moves image system.
Figure 10 is the figure of concrete example of the control of expression aperture device 62.At first, read in the beginning zone, Yi Bian aperture device 62 enlarges the aperture of blade of diaphragm 63 and blade of diaphragm 64, Yi Bian carry out the collection of fluoroscopy images at fluoroscopy images.Particularly, blade of diaphragm 64 is fixing, drive blade of diaphragm 63 to the direction opposite with the moving direction of image system, carry out the collection of fluoroscopy images simultaneously.For example, to obtain the amount (time) of bar chart that generate that blade of diaphragm 64 is fixing as the number of times of the pulsed fluoroscopy of required perspective view picture frame number, and drive blade of diaphragm 63.Shown in figure 10, when image system moved, if blade of diaphragm 64 is fixing, then blade of diaphragm 64 moved with image system.On the other hand, if the translational speed of corresponding image system drives blade of diaphragm 63 to the direction opposite with the moving direction of image system, then can the locus of blade of diaphragm 63 be fixed.
Read in zone line (fluoroscopy images reads in the beginning zone and fluoroscopy images reads between the end region) at fluoroscopy images, aperture device 62 keeps the aperture of blade of diaphragm 63 and blade of diaphragm 64 certain and carries out the collection of fluoroscopy images.Particularly, blade of diaphragm 63 and blade of diaphragm 64 is fixing and carry out the collection of fluoroscopy images.Shown in figure 10, when image system moved, if blade of diaphragm 63 is fixing with blade of diaphragm 64, then blade of diaphragm 63 moved with image system with blade of diaphragm 64.
Read in end region at fluoroscopy images, Yi Bian aperture device 62 dwindles the aperture of blade of diaphragm 63 and blade of diaphragm 64, Yi Bian carry out the collection of fluoroscopy images.Particularly, blade of diaphragm 63 is fixing, drive blade of diaphragm 64 to the direction opposite with the moving direction of image system, carry out the collection of fluoroscopy images simultaneously.For example, read in identical ground, beginning zone with fluoroscopy images, to obtain the amount (time) of bar chart that generate that blade of diaphragm 63 is fixing as the number of times of the pulsed fluoroscopy of required perspective view picture frame number, drive blade of diaphragm 64.In addition, the speed of blade of diaphragm 64 is the speed identical with the blade of diaphragm of the driving of reading in beginning zone at fluoroscopy images 63.Shown in figure 10, when image system moved, if blade of diaphragm 63 is fixing, then blade of diaphragm 63 moved with image system.If the translational speed of corresponding image system drives blade of diaphragm 64 to the direction opposite with the moving direction of image system, then can the locus of blade of diaphragm 64 be fixed.
In the whole zone of bar chart picture, the perspective view picture frame of identical number is added up, so its x-ray dose N (m) is certain all the time.
Figure 11 is the figure of the effect of illustrative embodiment 5.
Expression remains the bar chart picture that carries out the collection of fluoroscopy images definitely and obtain with the aperture of blade of diaphragm 63 and blade of diaphragm 64 among Figure 11 (a).
Read in beginning zone at fluoroscopy images, for example, first bar chart picture that begins from the left end of m=1 is only generated by perspective view picture frame 1.In addition, second the bar chart picture that begins from the left end of m=1 generated by perspective view picture frame 1 and perspective view picture frame afterwards 2.The 7th the bar chart picture that begins from the left end of m=1 generated by perspective view picture frame 1～perspective view picture frame 7.Therefore the number difference that adds up of the perspective view picture frame of the bar chart picture that generates owing to the perspective view picture frame is added up looks like to be shown in display part 80 as the different bar chart of concentration.
The aperture ground of representing appropriate change blade of diaphragm as illustrated in fig. 10 63 and blade of diaphragm 64 among Figure 11 (b) carries out the collection of fluoroscopy images and the bar chart picture that obtains.
Read in beginning zone at fluoroscopy images, for example, first bar chart picture that begins from the left end of m=1 is generated by perspective view picture frame 1～perspective view picture frame 7.In addition, second the bar chart picture that begins from the left end of m=1 generated by perspective view picture frame 2～perspective view picture frame 8.The 7th the bar chart picture that begins from the left end of m=1 generated by perspective view picture frame 7～perspective view picture frame 13.Like this, in the whole zone of the bar chart picture that generates through the perspective view picture frame is added up, (7) are identical for the number that adds up of perspective view picture frame, therefore can be on display part 80 the uniform bar chart picture of display density.
Use the action flow chart of Figure 12 that embodiment 5 is described.
(step 51)
The examiner selects bar chart as generate pattern from various screening-modes through operating portion 120.In addition, control part 118 will select bar chart to convey to each composed component as the situation of generate pattern.
(step 52)
The examiner sets in order to obtain the drive condition of bar chart as the speed of action of the direction of action of required image system (X ray generation portion 60 and X ray test section 70), image system through operating portion 12.In addition, control part 118 is to drive conditions such as the direction of action of drive division 130 image output systems, steady state speeds.
(step 53)
The examiner is that image collection begins the place through operating portion 120 with the end that image system is set in the region-of-interest of the acceptor 100 that will obtain the bar chart picture.Control part 118 makes image system move to image collection through drive division 130 to begin the place.For example, use the illumination part (not shown) that shows the x-ray bombardment scope of acceptor 100 through irradiates light.To the light of acceptor 100 irradiates light irradiating part,, begin place (fluoroscopy images reads in the beginning place) Yi Bian make image system move to image collection on one side the examiner confirms the x-ray bombardment scope.
(step 54)
(step 55)
The examiner is as if the image collection button of push portion 120, and then X ray generation portion 60, X ray test section 70, image processing part 112 etc. become image collection and begin SBR.Then, control part 118 calculates the distance till image system becomes steady state speed.Here, establish from the time that initial velocity (0) reaches cost till the steady state speed (V1) and be (t1), reach from steady state speed (V1) and stop that the time of cost is (t5)-(t4) till the speed (0).Control part 118 according to (V1) * (t1) calculate image system become till the steady state speed (V1) distance.
(step 56)
(step 57)
Particularly; At steady state speed (V1) is under the situation of (for example more than the 100mm/s) more than the setting; It is (for example below the 10ms) below the setting that control part 118 makes the interval of the X ray of pulsed exposure X ray, and the x-ray dose that perhaps makes every frame fluoroscopy images is setting above (for example more than the 10mAs).On the contrary; At steady state speed (V1) is under the situation of (for example below the 100mm/s) below the setting; The interval that makes the X ray of pulsed exposure X ray is setting above (for example more than the 10ms), and the x-ray dose that perhaps makes every frame fluoroscopy images is (for example below the 10mAs) below the setting.In the present embodiment, can set above-mentioned a plurality of settings to control part 118 in advance.
(step 58)
(step 59)
Read in the beginning zone at fluoroscopy images, Yi Bian aperture device 62 enlarges the aperture of blade of diaphragm 63 and blade of diaphragm 64, Yi Bian carry out the collection of fluoroscopy images.
(step 60)
Read in zone line (between beginning zone and the end region) at fluoroscopy images, aperture device 62 keeps the aperture of blade of diaphragm 63 and blade of diaphragm 64 certain and carries out the collection of fluoroscopy images.
(step 61)
The examiner on one side looks like to confirm through the bar chart in 80 pairs of stages midway that engaged of display part, on one side continue press operating part 120 the image collection button until the region-of-interest that arrives the acceptor 100 that will obtain the bar chart picture.Then, the examiner surpasses the moment relieving image collection button of region-of-interest in the action of image system.After decontroling the image collection button, control part 118 is identified as image collection and finishes (fluoroscopy images reads in and finishes the place), and high voltage generation portion 108, X ray generation portion 60, X ray test section 70, image processing part 112 etc. become the image collection done state.High voltage generation portion 108, X ray generation portion 60, X ray test section 70, image processing part 112 etc. become the image collection done state.
The examiner also can preestablish the image collection end place that stops to collect the perspective view picture frame.Particularly; Making image system move to the other end that image collection begins the place through drive division 130 is that image collection finishes the place, and the position sensor of positional information that is used to predict positional information and the X ray test section 70 of X ray generation portion 60 reads this positional information.The positional information of the image system that control part 118 will be read by position sensor is identified as the image collection end position.The positional information of the image system in the control part 118 detection position pick offs, and judge whether image system has arrived the image collection end position.Arrived at image system under the situation of image collection end position, control part 118 is collected end signal to output images such as high voltage generation portion 108, X ray generation portion 60, X ray test section 70, image processing parts 112.
(step 62)
Read in end region at fluoroscopy images, Yi Bian aperture device 62 dwindles the aperture of blade of diaphragm 63 and blade of diaphragm 64, Yi Bian carry out the collection of fluoroscopy images.
(step 63)
Particularly, move under the situation of 5mm at every perspective view picture frame of image system, image processing part 112 adds up the perspective view picture frame after moving direction squints 5mm successively, thus the perspective view picture frame is engaged and generation bar chart picture.Move under the situation of 10mm at every perspective view picture frame of image system, image processing part 112 adds up the perspective view picture frame after the moving direction of image system squints 10mm successively, thus the perspective view picture frame is engaged and generates the bar chart picture.Like this, image processing part 112 can be managed according to each perspective view picture frame location information, and each perspective view picture frame is engaged and generation bar chart picture.
(step 64)
According to the information of pushing (image collection button OFF) of the image collection button of operating portion 120 or the positional information (image system moves to the image collection end position) of position sensor, control part 118 is to end of output signals such as high voltage generation portion 108, X ray generation portion 60, X ray test section 70, image processing parts 112.High voltage generation portion 108 and X ray generation portion 60 stop to produce X ray, and drive division 130 makes image system stop to move.
In addition, also can omit (step 55), (step 56), can make the driving starting position consistent with the image collection starting position.Therefore, on one side the examiner confirms the x-ray bombardment scope, begin the place Yi Bian make image system move to image collection, therefore, the visibility of image collection starting position is good.And, owing to make the driving starting position consistent, begin to carry out the collection of fluoroscopy images from driving the starting position with the image collection starting position.Therefore, can shorten the rise time of bar chart picture.
Through making fluoroscopy images or bar chart picture from image storage part 114 outputs, display part 80 can show fluoroscopy images or bar chart picture.And, through make bar chart picture and fluoroscopy images corresponding together they obtain temporal information from image storage part 114 output, display part 80 can be shown in same picture with fluoroscopy images with the bar chart picture.Therefore, the examiner can confirm with fluoroscopy images the process that obtains of bar chart picture.For example, the examiner can confirm the injection situation of contrast agent through fluoroscopy images and bar chart picture.
More than, according to present embodiment, can use fluoroscopy images to generate the uniform bar chart picture of concentration, look like to compare with using the photographic images generation bar chart that obtains through the X ray shooting, can suppress being shone of acceptor.
Description of reference numerals
10 pedestal portions
20 supporting arm parts
30 carriages
40 top boards
50 column sections
60X ray generation portion
70X ray detection portion
80 display parts
100 acceptors
108 high voltage generation portions
112 image processing parts
114 image storage parts
118 control parts
120 operating portions
130 drive divisions
Claims (19)
1. radiodiagnosis device is characterized in that having:
Be used for to acceptor irradiation X ray X ray generation portion,
Detection based on the X ray test section of the X ray signal of the X ray that sees through said acceptor,
Be used to make drive division that the image system that comprises said X ray generation portion and said X ray test section moves,
Detect the positional information of said image system position sensor,
According to detected said positional information to a plurality of perspective view picture frames based on the X ray signal that obtains by said X ray test section add up the image processing part that generates the bar chart picture, show the display part of said bar chart picture.
2. radiodiagnosis device as claimed in claim 1, wherein,
X ray is shone with pre-set time interval in said X ray generation portion.
3. radiodiagnosis device as claimed in claim 1, wherein,
Said X ray generation portion sets the X ray condition according to the translational speed of said image system; And the said X ray condition irradiation X ray to set, wherein said X ray condition comprises interval, tube current, tube voltage and the shooting time of the X ray of pulsed exposure X ray.
4. radiodiagnosis device as claimed in claim 3, wherein,
The translational speed of said image system is the steady state speed of said image system.
5. radiodiagnosis device as claimed in claim 1, wherein,
Said image processing part correspondence obtain said perspective view picture frame said image system the position and the brightness value of a plurality of said perspective view picture frames is overlapped successively.
6. radiodiagnosis device as claimed in claim 1, wherein,
Said image processing part, the corresponding amount of movement of the said image system during according to said X ray generation portion irradiation primary X-ray makes the amount of the said amount of movement of fluoroscopy images vertical shift that obtains successively and adds up, and generates said bar chart picture.
7. radiodiagnosis device as claimed in claim 1, wherein,
Said drive division moves said image system, makes that stating image system in the place, image collection starting position that begins to collect said perspective view picture frame becomes steady state speed.
8. radiodiagnosis device as claimed in claim 1, wherein,
The said bar chart picture of the end that said image processing part deletion concentration is different generates said bar chart picture.
9. radiodiagnosis device as claimed in claim 1, wherein,
Have image storage part, this image storage part will be stored with obtaining temporal information as dynamic image from the fluoroscopy images that said image processing part obtains, and said bar chart picture is stored with obtaining temporal information.
10. radiodiagnosis device as claimed in claim 1, wherein,
Said display part is shown in same picture with said bar chart picture with said fluoroscopy images.
11. radiodiagnosis device as claimed in claim 1, wherein,
Said X ray generation portion as required total x-ray dose, sets the x-ray dose of a said perspective view picture frame according to the bar chart of the amount of a said perspective view picture frame.
12. radiodiagnosis device as claimed in claim 1, wherein,
Said image processing part is set the uniform concentration gain of the concentration that makes said bar chart picture to each perspective view picture frame.
13. radiodiagnosis device as claimed in claim 1, wherein,
Said X ray generation portion can change x-ray dose according to the region-of-interest of said acceptor.
14. radiodiagnosis device as claimed in claim 1, wherein,
Have diaphragm portion, this diaphragm portion can change the x-ray irradiation area to said acceptor, makes that the x-ray dose of said bar chart picture is even.
15. radiodiagnosis device as claimed in claim 14, wherein,
In the beginning zone of reading in of said fluoroscopy images, Yi Bian enlarge the aperture of said diaphragm portion, Yi Bian carry out the collection of fluoroscopy images.
16. radiodiagnosis device as claimed in claim 14, wherein,
In the end region of reading in of said fluoroscopy images, Yi Bian dwindle the aperture of said diaphragm portion, Yi Bian carry out the collection of fluoroscopy images.
17. like claim 15 or 16 described radiodiagnosis devices, wherein,
Said fluoroscopy images read in the reading between the end region of beginning zone and said fluoroscopy images, the aperture of said diaphragm portion kept necessarily and carry out the collection of fluoroscopy images.
18. radiodiagnosis device as claimed in claim 14, wherein,
In the whole zone of said bar chart picture, the number that adds up of said perspective view picture frame is identical.
19. a rectangular image generating method is characterized in that, may further comprise the steps:
The irradiation X ray and detect step based on the X ray signal of X ray,
According to positional information to a plurality of perspective view picture frames based on the X ray signal add up the step that generates the bar chart picture,
The step that shows said bar chart picture.
Applications Claiming Priority (5)
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| JP2009-086873 | 2009-03-31 | ||
| JP2009086873A JP5507869B2 (en) | 2009-03-31 | 2009-03-31 | X-ray diagnostic equipment |
| JP2009-207604 | 2009-09-09 | ||
| JP2009207604A JP2011055970A (en) | 2009-09-09 | 2009-09-09 | X-ray diagnostic apparatus and long-length image generation method |
| PCT/JP2010/055799 WO2010113999A1 (en) | 2009-03-31 | 2010-03-31 | X-ray diagnosis equipment and long-length image generation method |
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| CN102378598B CN102378598B (en) | 2014-08-20 |
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| JP6565461B2 (en) * | 2015-08-07 | 2019-08-28 | 株式会社島津製作所 | X-ray equipment |
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| WO2010113999A1 (en) | 2010-10-07 |
| CN102378598B (en) | 2014-08-20 |
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