CN103379859A - X-ray image diagnostic device and image display method - Google Patents
X-ray image diagnostic device and image display method Download PDFInfo
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Abstract
In order to accurately display the head-feet direction on a display unit regardless of the x-ray plane detector insertion direction, an x-ray image diagnostic device is provided with: an x-ray tube (1) for irradiating a test subject with x-rays; a grid (2) for removing a scattered ray component caused by the test subject (20); an x-ray plane detector (3) that detects transmitted x-rays of the test subject (20) and outputs image data, and is positioned so as to face the x-ray tube (1); an image display unit (6) for displaying an image based on image data; a grid stripe direction determination unit (5b) for determining whether the stripe direction originating from the grid included in the image data is vertical or horizontal; and an image rotation unit (5d) for rotating the image on the basis of the determination result from the grid stripe direction determination unit, in a manner such that the head direction in the region of the test subject (20) captured in the image aligns with the top direction on the display screen in the image display unit (6). Therein, the image display unit (6) displays the rotated image.
Description
Technical field
The present invention relates to a kind of X-ray imaging apparatus and method for displaying image, particularly a kind of Display Technique of photographs of the detected body that obtains by the radiography that has used the X ray area detector.
Background technology
In the past, in industrial nondestructive inspection, the place of medical diagnosis, the general extensive device that has utilized the intensity distributions that detects the lonizing radiation that seen through object to object irradiation lonizing radiation to obtain the photographs of object.As the conventional method of such photography, can enumerate the film corresponding with X ray/screen (screen) method.In recent years, owing to the progress of digital technology, require following mode, be about to photographs and be transformed to the signal of telecommunication, after this signal of telecommunication being carried out the image processing, in playbacks such as CRT, obtain thus the photographs of high image quality as visual image.In addition, be accompanied by the progress of semiconductor process technique, developed the device that uses the X ray area detector similarly photographs to be photographed.These systems compare with the lonizing radiation system of existing use photonasty film, have very widely dynamic range, have the practical advantage of photographs of the impact of the change that can access the light exposure that is not subject to lonizing radiation.
In such X ray area detector, because the progress of technology, even miniaturization has been developed the movable-type digital X-ray photographic attachment that is called as so-called electronic cassette to the size of existing simulation magazine (cassette).
Such X ray area detector generally is identical with existing simulation magazine size in order existing camera stand not to be upgraded and to use, and is rectangular size mostly.In the situation of rectangular size, the size according to detected body has the situation of vertical insertion, laterally inserted situation with respect to camera stand.Fig. 1 represents to carry out an example of the positive situation of photographing of chest.Fig. 1 is the key diagram of direction of insertion with the relation of cephalopodium direction of the X ray area detector of expression in the background technology, and (a) expression is vertically inserted, and (b) represents laterally inserted.As Fig. 1 (a), vertically insert in the situation of (expression is lengthways inserted area detector 102 with respect to the cephalopodium direction 101 of vertical position camera stand 100), vertical displayed map picture (head of the detected body of in image, photographing be on) in image display device 103, but as Fig. 1 (b), carry out in the laterally inserted situation (head of the detected body of photographing is for right or left) displayed map picture horizontal in image display device 103 in image.
As the method that addresses this problem, by the GUI(graphic user interface) by the user image is rotated, detection perhaps is set as sensor, the rotating mechanism of the direction of a kind of flat-panel detector (being designated hereinafter simply as " FPD ") of X ray area detector, is rotated according to its information.
But, can produce obstacle to the workflow that checks by user's image rotating.In addition, if FPD direction detection sensor, rotating mechanism are set, then can raise the cost, and then structure also becomes greatly, might produce constriction to detected body.
In order to address this problem, in patent documentation 1, proposed to embed labelling in the bight of image and the method for carrying out the counter-rotating of image/rotation.
The prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2000-107158 communique
Summary of the invention
The problem that invention will solve
But, the sometimes photography in photographs of the method that patent documentation 1 is put down in writing insert labelling in the zone of detected body, this labelling can be to diagnosis generation obstacle sometimes.And then, owing to must insert labelling, workflow is produced obstacle.
The object of the invention is to: a kind of technology is provided, and it can eliminate the problem points of above-mentioned record, with the direction of insertion of X ray area detector irrespectively, in image display device, correctly show the cephalopodium direction.
Be used for solving the means of problem
In order to achieve the above object, the invention is characterized in: it is vertical or horizontal differentiating the stripe direction that causes because of grid that is included in the view data, according to differentiating the result, image rotating shows postrotational image so that a direction of the zone of the detected body of photographing (hereinafter referred to as " detected body image ") is consistent with upper direction in the display frame of image displaying part in image.
The invention effect
According to the present invention, can provide a kind of technology that can irrespectively in display part, correctly show with the direction of insertion of X ray area detector the cephalopodium direction.
Description of drawings
Fig. 1 is the key diagram of relation of direction of insertion and cephalopodium direction of the X ray area detector of expression background technology, and (a) expression is vertically inserted, and (b) represents laterally inserted.
Fig. 2 is the sketch map of Sketch of the X-ray imaging apparatus 10 of expression present embodiment.
Fig. 3 is the flow chart of flow process of image display process of the X-ray imaging apparatus of expression the first embodiment.
Fig. 4 is the flow chart that expression grid stripe direction is differentiated the flow process of processing.
Fig. 5 is the key diagram that expression grid stripe direction is differentiated the content of processing, (a) scanning direction of expression line, (b) expression grid stripe direction is that frequency response in the situation of indulging is replied, (c) expression line direction and grid stripe direction is the relation of the situation of indulging, (d) expression grid stripe direction is that frequency response in the horizontal situation is replied, and (e) expression line direction is the relation of the situation of horizontal stroke with the grid stripe direction.
Fig. 6 is the flow chart of the flow process of expression cephalopodium rotation processing.
Fig. 7 is the expression clinostatism rotates the content of processing with the cephalopodium of desk-top camera stand key diagram.
Fig. 8 is the flow chart of flow process of the processing of expression the second embodiment.
Fig. 9 is the key diagram of the processing of expression the second embodiment.
Figure 10 is the flow chart of flow process of the processing of expression the 3rd embodiment.
Figure 11 is the key diagram of the processing of expression the 3rd embodiment.
The specific embodiment
The X-ray imaging apparatus of present embodiment possesses: the X-ray tube ball, and it is to detected body X-ray irradiation; Grid, it removes the scattered ray composition that is produced by above-mentioned detected body; The X ray area detector, itself and above-mentioned X-ray tube ball relatively dispose, and detect the X ray that sees through of above-mentioned detected body, output image data; Image displaying part, it shows the image based on above-mentioned view data; The stripe direction that causes because of above-mentioned grid that grid stripe direction judegment part, its differentiation are included in the above-mentioned view data is vertical or horizontal; Image rotation section, it rotates above-mentioned image so that a direction of the zone of the above-mentioned detected body of photographing (detected body image) is consistent with upper direction in the display frame of above-mentioned image displaying part according to the differentiation result of above-mentioned grid stripe direction judegment part in above-mentioned image.In addition, it is characterized in that above-mentioned image displaying part shows above-mentioned postrotational image.
In addition, above-mentioned grid stripe direction judegment part also can carry out the high speed Fourier transform processing to above-mentioned view data, the recently differentiation grid stripe direction of the value of use grid striped frequency response or near the frequency response of above-mentioned grid striped frequency response and above-mentioned grid striped frequency.
In addition, above-mentioned grid stripe direction judegment part also can carry out above-mentioned high speed Fourier transform processing to the direct X ray zone of the direct incident of X ray in the above-mentioned image.
And then above-mentioned grid stripe direction judegment part also can above-mentioned detected body and the photo distance between the above-mentioned X-ray tube ball when obtaining above-mentioned view data by above-mentioned X-ray imaging apparatus decide above-mentioned grid striped frequency.
In addition, can also possess: detector direction of insertion storage part, the above-mentioned X ray area detector of its storage expression is with respect to the direction of insertion information of the direction of insertion of the camera stand that holds above-mentioned grid and above-mentioned X ray area detector, wherein, above-mentioned image rotation section is according to differentiation result and the above-mentioned direction of insertion information of above-mentioned grid stripe direction judegment part, determine the direction of rotation of above-mentioned image, and rotate above-mentioned image so that a direction of the above-mentioned detected body in the above-mentioned image is consistent with the upper direction of above-mentioned image displaying part.
In addition, above-mentioned direction of insertion information also can be with as any one of 180 degree rotations of the direction of rotation of above-mentioned image, right 90 degree rotations or left 90 degree rotations, with the information of the parameter correlation connection that the cephalopodium direction of above-mentioned camera stand and above-mentioned X ray plane device are mapped with respect to the direction of insertion of above-mentioned camera stand.
Above-mentioned image rotation section also can be in above-mentioned image, extracts the detected body region of the above-mentioned detected body of having photographed and detects the cephalopodium direction of above-mentioned detected body, and according to its testing result, the direction of rotation of differentiating above-mentioned image is right rotation or anticlockwise.
In addition, can also possess: storage part, its subsidiary rotation information that is determined by above-mentioned image rotation section and storing in above-mentioned view data.
In addition, the method for displaying image of present embodiment is characterised in that, comprising: read in by the photograph step of the resulting view data of above-mentioned detected body of the X-ray imaging apparatus that possesses the grid of removing the scattered ray composition that is generated by detected body, X ray area detector; Differentiating the stripe direction that causes because of above-mentioned grid that is included in the above-mentioned view data is vertical or horizontal step; According to above-mentioned differentiation result, rotate above-mentioned image, the step that the direction so that the zone of the above-mentioned detected body of photographing in (detected body image) is consistent with upper direction in the display frame of this image of demonstration in the image based on above-mentioned view data; Above-mentioned postrotational image is presented at step in the above-mentioned display frame.
Below, use accompanying drawing to be described more specifically embodiments of the present invention.To the additional same-sign of step of structure with identical function and identical contents processing, the repetition that the description thereof will be omitted.
Fig. 2 is the sketch map of Sketch of the X-ray imaging apparatus 10 of expression present embodiment.X-ray imaging apparatus 10 possesses: X-ray tube ball 1, and it is to detected body 20 X-ray irradiations; Grid 2, it removes the scattered ray composition that is produced by detected body 20; X ray area detector 3, itself and X-ray tube ball 1 relatively dispose, and detect the X ray that sees through of detected body 20; Camera stand 4, it holds grid 2, X ray area detector 3; Image processing apparatus 5, it carries out processing from the storage of the view data of X ray area detector 3 outputs and image; Image display device 6, its demonstration is stored in the view data in the image processing apparatus 5.
Image processing apparatus 5 possesses: image storage part 5a, its storing image data; Grid stripe direction judegment part 5b, it is differentiated from the view data of X ray area detector 3 outputs or is included in scattered light the photographs that is read in by image processing apparatus 5 to remove the stripe direction of grid (being designated hereinafter simply as " grid ") 2 be vertically or laterally; Detector direction of insertion storage part 5c, the direction of insertion information of the X ray area detector 3 on its storage camera stand 4; The 5d of image rotation section, it is rotated the image that is stored among the image storage part 5a according to direction of insertion information with from the information of grid stripe direction judegment part 5b.
Image storage part 5a and detector direction of insertion storage part 5c constitute storage device, for example memorizer, disk, the nonvolatile memory of the non-volatile or volatibility that the hardware that possesses composing images blood processor 5 comprises.In addition, grid stripe direction judegment part 5b and the 5d of image rotation section by the program that makes computer carries out image display packing, carry out the hardware cooperation of this program and consist of, wherein, this method for displaying image comprises: the view data of reading in is implemented high speed Fourier transform (Fast Fourier Transform; Be designated hereinafter simply as " FFT "), the response of computation grid striped frequency is replied, and differentiates the step of grid stripe direction according to it; Use this differentiation result to carry out the step that image rotation is processed.
In the present embodiment, the grid stripe direction of the view data that the X ray area detector 3 that differentiation possesses from X-ray imaging apparatus 10 is exported, image is rotated, but also can be read in by image processing apparatus 5 view data of the photographs of being photographed by other X-ray imaging apparatus, it is carried out and the processing of above-mentioned same image.
According to Fig. 3, the summary of image display process of the X-ray imaging apparatus of the first embodiment is described.Fig. 3 is the flow chart of flow process of image display process of the X-ray imaging apparatus of expression the first embodiment.Below, describe according to the step order of Fig. 3.
(step S1)
Obtain view data from X ray area detector 3, temporarily be stored among the image storage part 5a.Grid stripe direction judegment part 5b differentiates the grid stripe direction that is included in this view data.If differentiation is longitudinal direction then stores the longitudinal direction sign, if differentiation is transverse direction then stores transverse direction sign (S1).Will be explained below the detailed of this step.
(step S2)
The 5d of image rotation section reads in expression X ray area detector 3 for the direction of insertion information of the direction of insertion of camera stand 4 from detector direction of insertion storage part 5c.When X-ray imaging apparatus 1 or camera stand 4 are set, determine to insert from which side of the right side of camera stand and left side, when camera stand 4 is set as setting value and pre-stored direction of insertion information.Be the parameter corresponding with the direction of insertion of determining with the cephalopodium direction indication of camera stand 4, with pre-stored as direction of insertion information accordingly with image rotation direction corresponding to this parameter.Then, the 5d of image rotation section is according to the direction of insertion information of reading from detector direction of insertion storage part 5c, the grid stripe direction information of step S1, differentiate for the consistent cephalopodium direction (S2) that whether needs the image rotating data of cephalopodium direction of image display device 6.In unwanted situation, advance to step S4.In the situation of needs, advance to step S3.
(step S3)
The 5d of image rotation section carries out the cephalopodium rotation and processes (S3).Being in the situation of indulging at the grid stripe direction, carrying out 180 degree rotations, is in the situation of transverse direction at the grid stripe direction, carries out 90 degree rotations.Also can with above-mentioned grid striped differentiate in length and breadth and cephalopodium is differentiated the sign of rotation that determines in the processing and is stored as incidental information.For example, as " IMEGEROTATION:1 ", as the DICOM(note: the communication protocol of medical image a kind of) incidental information and preserve the resume that carry out image rotation, the information that represents its direction of rotation, after this in which direction photograph as can be known thus.Will be explained below the detailed of this step.Incidental information as above-mentioned DICOM is preserved one that only preserves example, also can save as the image incidental information of other planning, can also preserve accordingly image rotation resume and direction of rotation with the information of recognition image.
(step S4)
Image processing apparatus 5 is carried out necessary processing in the processing of removing of grid striped before waiting the image display process, and the image after rotation is processed or the image that does not need to rotate are presented at (S4) on the image display device 6.At this moment, the above-below direction of image display device 6 is consistent with the cephalopodium direction of detected body image in being included in shown photographs.
If necessary, then the view data of image storage part 5a is updated to the view data after rotation is processed, end process.
＜grid stripe direction is differentiated processing 〉
According to Fig. 4 and Fig. 5 grid stripe direction differentiation processing is described.Fig. 4 is the flow chart that expression grid stripe direction is differentiated the flow process of processing.Fig. 5 is the key diagram that expression grid stripe direction is differentiated the content of processing, (a) scanning direction of expression row (line), (b) expression grid stripe direction is that frequency response in the situation of indulging is replied, (c) expression line direction and grid stripe direction is the relation of the situation of indulging, (d) expression grid stripe direction is that frequency response in the horizontal situation is replied, and (e) expression line direction and grid stripe direction are the relations of horizontal situation.Below, describe according to each step order of Fig. 4.
(step S11)
Grid stripe direction judegment part 5b scans (S11) to any delegation in the image 50.For in the position of avoiding as the aperture zone, being difficult to detect the grid striped in the image 50, it is desirable to line scanning with near the middle body of image as starting point.In addition, in line scanning, can all go processing, but in order to shorten the processing time, also can process every predetermined line number.And then, in order to remove noise contribution, also can after processing, implement FFT smoothing techniques etc.
In the present embodiment, carry out line scanning according to the interval of 100 row.And then the higher limit (for example n time) of the number of times of line scanning is carried out in setting.If the line scanning number of times is higher limit following (being equivalent to "No"), advance to step S12.In the situation of the line scanning of having carried out the higher limit sub-quantity, be judged as line scanning and finish (being equivalent to "Yes"), advance to step S16.
In the present embodiment, like that, at first the center row 50m from image 50 begins to read the capable 50t that is positioned at 100 row tops shown in Fig. 5 (a), in next one circulation, makes line scanning advance to the capable 50u that is positioned under 100 row from center row 50m.
(step S12)
Grid stripe direction judegment part 5b carries out FFT to 1 row of reading and processes (S12) in step S11.
(step S13)
Grid stripe direction judegment part 5b is determined with without grid striped (S13) according to the response Rg of grid striped frequency.Grid stripe direction judegment part 5b the response Rg of grid striped frequency with near the ratio of response Ra of frequency be in the situation more than the threshold value th, differentiate for grid is arranged.Shown in Fig. 5 (c), exist in the situation of grid striped in the direction vertical with row, process if carry out FFT, then as Fig. 5 (b), represent that at transverse axis frequency, the longitudinal axis represent to have peak value among distribution Figure 51 of the response that responds in grid striped frequency band Rg.In addition, in the distribution that the makes response image 52 corresponding with brightness, in grid striped frequency band, described highly (in vain) with phase specific luminance around it.In the present embodiment, threshold value th is made as 2.0.
In situation from the X ray area detector to transverse direction that insert (with reference to Fig. 5 (e)), like that, all row becomes Rg=Ra, differentiates for there not being grid shown in distribution Figure 53 of Fig. 5 (d).
If be judged to be the grid striped, then advance to step S14, there is not the grid striped if be judged to be, then advance to step S15, the position that line scanning is carried out in change turns back to step S11.
Perhaps, also can constitute grid stripe direction judegment part 5b under the response Rg of grid striped frequency is situation more than the predetermined value, differentiate for the grid striped is arranged.
(step S15)
Grid stripe direction judegment part 5b adds the longitudinal direction sign and finishes the grid stripe direction and differentiate processing (S15).
(step S16)
Also do not detect in the situation of grid striped even carry out the processing of step S11～step S14 on repetition pre-determined number ground, grid stripe direction judegment part 5b adds the transverse direction sign and finishes the grid stripe direction and differentiate processing (S16).
The rotation of＜cephalopodium is processed 〉
According to Fig. 6 and Fig. 7 cephalopodium rotation processing is described.Fig. 6 is the flow chart of the flow process of expression cephalopodium rotation processing.Fig. 7 is the expression clinostatism rotates the content of processing with the cephalopodium of desk-top camera stand key diagram.
Be designated hereinafter simply as " camera stand 70 " for clinostatism shown in Figure 7 with desk-top camera stand 70(), suppose to have pre-determined a direction 71h and sufficient direction 71l.In addition, the image of supposing X ray area detector 3 is read starting position 3a and image, and to read direction 3b also be known.And then, for the photographs that obtains from X ray area detector 3, it is corresponding that the upper left corner of the display frame of known image display device 6 and image are read starting position 3a, shows photographs in the direction mode consistent with the direction of reading direction 3b along image from the from left to right of display frame.
And then, for the relation of camera stand 70 with the direction of insertion of X ray area detector 3, " the horizontal insertion " that " vertical insert " that insert in the long limit of rectangular-shaped X ray area detector 3 mode consistent with the long limit of camera stand 70 is arranged, insert in the consistent mode of the minor face of the long limit of rectangular-shaped X ray area detector 3 and camera stand 70, for each situation of " the vertical insertion ", " horizontal insertion ", the situation that consideration is inserted from the right side of the end face of camera stand 70, situation about inserting from the left side.4 kinds of direction of insertion information of therefore, below explanation " the vertical insertion and right insertion ", " the vertical insertion and left insertion ", " horizontal insertion and right insertion ", " horizontal insertion and left insertion ".
(situation of vertical insertion and right insertion)
The parameter of the relation of the direction of insertion (vertical insertion and right insertion) of cephalopodium direction 71h, 71l with the X ray area detector 3 of the camera stand 70 of expression in this situation is made as " 0 ".When parameter " 0 ", if the photographs of reading from X ray area detector 3 is shown, so that as described above the upper left corner of the display frame of image display device 6 and image to read starting position 3a corresponding, consistent with the direction of reading direction 3b along image from the direction of the from left to right of display frame, the upper direction in the display frame of a direction of photographs and image display device 6 consistent (be equivalent to image rotation before " state 0 ' ") then.Thus, do not need to carry out image rotation and process, therefore 0 storage is made as the direction of insertion information that expression does not need " 0: former state output " of image rotation for parameter.
(situation of vertical insertion and left insertion)
The parameter of the relation of the direction of insertion (vertical insertion and left insertion) of cephalopodium direction 71h, 71l with the X ray area detector 3 of the camera stand 70 of expression in this situation is made as " 1 ".When parameter " 1 ", the image of X ray area detector 3 is read the sufficient side that starting position 3a is positioned at camera stand 70.Thus, read starting position 3a side at the image of X ray area detector 3, the sufficient side of detected body 20 is photographed.Under this state, if being read starting position 3a, the image of X ray area detector 3 is made as the upper left corner, photographs is presented on the image display device 6, then in shown photographs, the foot of detected body becomes upper (being equivalent to image rotation front " state 1` "), and namely the cephalopodium direction of photographs is inverted in 180 degree and shows.Therefore, if be presented on the image display device 6 after the 180 degree rotations in that the photographs of reading from X ray area detector 3 is carried out, then a side of photographs becomes upper and is presented on the image display device 6.Thus, be made as the direction of insertion information of " rotation of 1:180 degree " that expression need to be carried out 180 degree rotations of image for parameter " 1 " storage.
(situation of horizontal insertion and right insertion)
The parameter of the relation of the direction of insertion (horizontal insertion and right insertion) of cephalopodium direction 71h, the 71l of the camera stand 70 of expression in this situation and X ray area detector 3 is made as " 2 ".When parameter " 2 ", the image of X ray area detector 3 is read the sufficient side that starting position 3a is positioned at camera stand 70.In addition, to read direction 3b consistent with a direction 71h of camera stand 70 for image.Thus, read starting position 3a side at the image of X ray area detector 3, the sufficient side of detected body 20 is photographed, read direction 3b along image a direction of detected body 20 is photographed.Under this state, if being read starting position 3a, the image of X ray area detector 3 is made as the upper left corner, photographs is presented on the image display device 6, then in shown photographs, the sufficient side of detected body 20 becomes a left side, side becomes the right side (be equivalent to image rotation before " state 2 ' "), and namely a direction of photographs is with respect to the top 90-degree rotation ground demonstration to the right of display frame.Therefore, if be presented on the image display device 6 after the degree rotation of a left side 90 in that the photographs of reading from X ray area detector 3 is carried out, then a direction of photographs becomes upper and is presented on the image display device 6.Thus, be made as the direction of insertion information of " anticlockwise of 2:90 degree " that expression need to be carried out a left side 90 degree rotations of image for parameter " 2 " storage.
(situation of horizontal insertion and left insertion)
The parameter of the relation of the direction of insertion (horizontal insertion and left insertion) of cephalopodium direction 71h, the 71l of the camera stand 70 of expression in this situation and X ray area detector 3 is made as " 3 ".When parameter " 3 ", the image of X ray area detector 3 is read the sufficient side that starting position 3a is positioned at camera stand 70.In addition, to read direction 3b consistent with the sufficient direction 71l of camera stand 70 for image.Thus, read starting position 3a side at the image of X ray area detector 3, a side of detected body 20 is photographed, read direction 3b along image the sufficient direction 71l that is detected body 20 is photographed.Under this state, if being read starting position 3a, the image of X ray area detector 3 is made as the upper left corner, photographs is presented on the image display device 6, then in shown photographs, a side of detected body 20 becomes a left side, the foot side becomes the right side (being equivalent to image rotation front " state 3 ' "), and namely a direction of photographs shows on 90-degree rotation ground left with respect to the top of display frame.Therefore, if be presented on the image display device 6 after the degree rotation of the right side 90 in that the photographs of reading from X ray area detector 3 is carried out, then a direction of photographs becomes upper and is presented on the image display device 6.Thus, be made as the direction of insertion information of " right rotation of 3:90 degree " that expression need to be carried out the right side 90 degree rotations of image for parameter " 3 " storage.
In the present embodiment, above-mentioned 4 situations have been described, but usually, when the user arranges camera stand 70, have determined right insertion or left insertion.Then, the direction of insertion information of 2 corresponding patterns is pre-stored in detector direction of insertion storage part 5c as setting value respectively with the direction of insertion of the direction of insertion determined and X ray area detector 3 (vertical insert, horizontal insertion).Then, the 5d of image rotation section is when carrying out cephalopodium rotation processing, and is corresponding with which direction of insertion information of 2 patterns according to detector direction of insertion storage part 5c judgement, carries out the cephalopodium rotation and processes.
Below, according to each step order of Fig. 6, illustrate that clinostatism rotates processing with the cephalopodium of desk-top camera stand.
(step S21)
The 5d of image rotation section reads out in the longitudinal and transverse sign that the grid stripe direction is differentiated storage in the processing.Under it is worth for vertical situation, advance to step S22, in the situation of horizontal stroke, advance to step S24(S21).
(step S22)
The 5d of image rotation section advances to 0 or 1 branch with reference to the direction of insertion information that is stored among the detector direction of insertion storage part 5c.In 0 situation, directly output.In 1 situation, advance to step S23(S22).
(step S23)
The 5d of image rotation section makes image carry out 180 degree rotations and exports (S23).
(step S24)
In the situation of slogan banner will, the 5d of image rotation section advances to 2 or 3 branch with reference to the direction of insertion information in the situation that is stored in the transverse direction among the detector direction of insertion storage part 5c.In 2 situation, advance to step S25, in 3 situation, advance to step S26(S24).
(step S25)
The 5d of image rotation section makes image 90-degree rotation and exporting left, finishes the cephalopodium rotation and processes (S25).
(step S26)
The 5d of image rotation section makes image 90-degree rotation and exporting to the right, finishes the cephalopodium rotation and processes (S26).
According to present embodiment, can irrespectively correctly in image display device, show the cephalopodium direction with the direction of insertion of X ray area detector.
The＜the second embodiment 〉
Then, according to Fig. 8, Fig. 9 the second embodiment is described.The second embodiment is the embodiment that helps to improve the precision of grid stripe direction Check processing.At this, Fig. 8 is the flow chart of flow process of the processing of expression the second embodiment.Fig. 9 is the key diagram of the processing of expression the second embodiment.Below, describe according to each step order of Fig. 8.
(step S201)
It is not the zone of detected body region (detected body image) that grid stripe direction judegment part 5b extracts from photographs.Said herein is not that the zone of detected body region (detected body image) refers to it is not aperture zone and the detected body region that reduces X-radiation as shown in Figure 9, but direct irradiation the zone of X ray (hereinafter referred to as " directly X ray is regional ").Grid stripe direction judegment part 5b extracts the direct X ray zone 91(S201 in the photographs 90 as shown in Figure 9).
(step S202～S204)
Grid stripe direction judegment part 5b sets any one line in the direct X ray zone 91 that extracts.Then, based on this line, carry out the grid stripe direction in step S1, illustrated and differentiate and process.
Below, with the first embodiment similarly, for the direct X ray area judging grid direction (S202) that extracts.If differentiation is longitudinal direction then stores the longitudinal direction sign, advances to next step.If differentiation is transverse direction then stores the transverse direction sign.Then, use the direction of insertion information of above-mentioned detector direction of insertion storage part 5c, differentiating the image rotation 5d of section needs still not need to carry out the rotation (S203) of cephalopodium direction.In unwanted situation, advance to next step.In the situation of needs, carry out the left or right 90 degree rotations (S204) of 180 degree rotations.Implement 180 degree rotations in the grid direction in for vertical situation.Under being horizontal situation, the grid direction implements 90 degree rotations.
According to present embodiment, by only differentiating the grid stripe direction with the direct X ray zone of the detected body of not photographing, can not sneak into the noises such as signal component of detected body, therefore improved accuracy of detection.
The＜the three embodiment 〉
Then, according to Figure 10, Figure 11 the 3rd embodiment is described.The 3rd embodiment is the embodiment that helps the precision of cephalopodium rotation processing.At this, Figure 10 is the flow chart of flow process of the processing of expression the 3rd embodiment.Figure 11 is the key diagram of the processing of expression the 3rd embodiment.Below, describe according to each step order of Figure 10.
(step S301)
Differentiate grid stripe direction (S301) for photographs 110.It can be any one processing of the first embodiment, the second embodiment that the grid stripe direction is differentiated processing.If differentiation is longitudinal direction then stores the longitudinal direction sign, advances to next step.If differentiation is transverse direction then stores the transverse direction sign, advances to next step.
(step S302)
The detected body region of detected body (detected body image) 111 that the 5d of image rotation section has extracted photography in the photographs 110 is differentiated cephalopodium direction (S302) based on the characteristic quantity of this detected body region.As shown in Figure 11, if the positive photography of chest, then the 5d of image rotation section obtains the information of cervical vertebra, clavicle, shoulder joint in a direction.In addition, can obtain heart, transeptate information as sufficient direction.And then, also can infer the cephalopodium direction according to shape of pulmonary etc.By such extraction people's internal organs, the position of bone, can judge the cephalopodium direction.
As an example of the determination processing of the cephalopodium direction of the 5d of image rotation section, for example a direction of photographs 110 is scanned and generate concentration curve.Then, along with the direction of the above-mentioned perpendicular direction width of concentration curve relatively in turn.In the situation of thoracic photography image, carry out line sweep along the arrow A A ' of Figure 11, generate concentration curve for each line.Then, the width of each concentration curve compared.The width of the concentration curve of the Width chest of the concentration curve of head is narrow, and therefore by they are compared, head can be differentiated the cephalopodium direction with respect to the position of chest as can be known.Perhaps, if carry out line sweep along the arrow B B ' of Figure 11, each line is generated concentration curve, then do not have detected body region (detected body image) from shoulder near head, therefore, the shape that is shaped as secund (chest) of concentration curve.Thus, according to the shape of concentration curve as can be known head can differentiate the cephalopodium direction with respect to the position of chest.
The 5d of image rotation section differentiates the cephalopodium direction according to the concentration curve that generates based on detected body region (detected body image), and differentiating needs still not need to carry out the cephalopodium rotation.In unwanted situation, advance to next step.In the situation of needs, advance to step S303.
(step S303)
If the grid stripe direction is longitudinal direction, then the 5d of image rotation section makes photographs carry out 180 rotations.If transverse direction, then left or the right side carry out 90 degree rotations.
According to present embodiment, can irrespectively differentiate the cephalopodium direction with direction of insertion information, therefore read in the not clear image of direction of insertion information, for example by other X-ray imaging apparatus photographies thereby do not know the photographs of direction of insertion, and be presented in the situation of image display device, a direction of photographs and the upper direction of image display device are as one man shown.
＜other embodiments 〉
Except above-mentioned embodiment, in the situation of using sampled images, grid striped frequency is according to the detected body of photographing-X-ray tube ball distance and different, therefore also can prepare the table that each sampling interval number and photo distance has been pre-determined grid striped frequency in advance, read in sampling interval number, the detected body-X-ray tube ball distance that is included in photography conditions, the display condition by grid stripe direction judegment part 5b, with reference to above-mentioned table, set the grid striped frequency that meets each condition.
And then grid striped frequency band changes according to the pixel size of cell densities, X ray area detector, but also can be detected corresponding with it grid striped frequency and be used for its processing by grid stripe direction judegment part 5b.
In addition, in the above-described embodiment, the example of rectangular-shaped X ray area detector is illustrated, but in the situation of foursquare X ray area detector, also can the image-based read-out position and read direction, use the present invention.
Symbol description
1:X ray tube ball; 2: scattered ray is removed grid; 3:X ray plane detector; 4: camera stand; 5: image processing apparatus; 6: image display device: the 10:X ray image diagnostic equipment; 20: detected body.
Claims (9)
1. X-ray imaging apparatus is characterized in that possessing:
The X-ray tube ball, it is to detected body X-ray irradiation;
Grid, it removes the scattered ray composition that is produced by above-mentioned detected body;
The X ray area detector, itself and above-mentioned X-ray tube ball relatively dispose, and detect the X ray that sees through of above-mentioned detected body, output image data;
Image displaying part, it shows the image based on above-mentioned view data;
The stripe direction that causes because of above-mentioned grid that grid stripe direction judegment part, its differentiation are included in the above-mentioned view data is vertical or horizontal;
Image rotation section, it rotates above-mentioned image according to the differentiation result of above-mentioned grid stripe direction judegment part, so that the direction in the zone of the above-mentioned detected body of photographing in the above-mentioned image is consistent with upper direction in the display frame of above-mentioned image displaying part, wherein,
Above-mentioned image displaying part shows above-mentioned postrotational image.
2. X-ray imaging apparatus according to claim 1 is characterized in that,
Above-mentioned grid stripe direction judegment part carries out the high speed Fourier transform processing to above-mentioned view data, the recently differentiation grid stripe direction of the value of use grid striped frequency response or near the frequency response of above-mentioned grid striped frequency response and above-mentioned grid striped frequency.
3. X-ray imaging apparatus according to claim 2 is characterized in that,
Above-mentioned grid stripe direction judegment part carries out above-mentioned high speed Fourier transform processing to the direct X ray zone of the direct incident of X ray in the above-mentioned image.
4. the described X-ray imaging apparatus of according to claim 1～3 any one is characterized in that,
Above-mentioned detected body and the photo distance between the above-mentioned X-ray tube ball when above-mentioned grid stripe direction judegment part basis obtains above-mentioned view data by above-mentioned X-ray imaging apparatus decide above-mentioned grid striped frequency.
5. X-ray imaging apparatus according to claim 1 is characterized in that,
Also possess: detector direction of insertion storage part, its storage represents above-mentioned X ray area detector with respect to the direction of insertion information of the direction of insertion of the camera stand that holds above-mentioned grid and above-mentioned X ray area detector, wherein,
Above-mentioned image rotation section is according to differentiation result and the above-mentioned direction of insertion information of above-mentioned grid stripe direction judegment part, determine the direction of rotation of above-mentioned image, and rotate above-mentioned image so that a direction of the above-mentioned detected body in the above-mentioned image is consistent with the upper direction of above-mentioned image displaying part.
6. X-ray imaging apparatus according to claim 5 is characterized in that,
Above-mentioned direction of insertion information is with as any one of 180 degree rotations of the direction of rotation of above-mentioned image, right 90 degree rotations or left 90 degree rotations, with the information of the parameter correlation connection that the cephalopodium direction of above-mentioned camera stand and above-mentioned X ray plane device are mapped with respect to the direction of insertion of above-mentioned camera stand.
7. X-ray imaging apparatus according to claim 1 is characterized in that,
Above-mentioned image rotation section extracts the detected body region of the above-mentioned detected body of having photographed and detects the cephalopodium direction of above-mentioned detected body in above-mentioned image, and according to its testing result, the direction of rotation of differentiating above-mentioned image is right rotation or anticlockwise.
8. X-ray imaging apparatus according to claim 1 is characterized in that,
Also possess: storage part, it will be attached by the rotation information that above-mentioned image rotation section determines in above-mentioned view data and store.
9. a method for displaying image is characterized in that, comprising:
Read in by the photograph step of the resulting view data of above-mentioned detected body of the X-ray imaging apparatus that possesses the grid of removing the scattered ray composition that is generated by detected body, X ray area detector;
Differentiating the stripe direction that causes because of above-mentioned grid that is included in the above-mentioned view data is vertical or horizontal step;
According to above-mentioned differentiation result, rotate above-mentioned image, so that the step consistent with upper direction in the display frame that shows this image of the direction in the zone of the above-mentioned detected body of in the image based on above-mentioned view data, photographing;
Above-mentioned postrotational image is presented at step in the above-mentioned display frame.
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| PCT/JP2012/052525 WO2012111458A1 (en) | 2011-02-15 | 2012-02-03 | X-ray image diagnostic device and image display method |
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| CN111096759A (en) * | 2018-10-26 | 2020-05-05 | 深圳迈瑞生物医疗电子股份有限公司 | X-ray photography system, flat panel detector thereof and related method |
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| JPH0385685A (en) * | 1989-08-30 | 1991-04-10 | Nippon Telegr & Teleph Corp <Ntt> | Method for detecting direction of head part rotation |
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| WO2012111458A1 (en) | 2012-08-23 |
| JP5706452B2 (en) | 2015-04-22 |
| CN103379859B (en) | 2015-09-09 |
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