JPWO2015011987A1 - X-ray equipment - Google Patents

Abstract

When the positioning of the subject is completed, the operator presses the photographing switch 51 in the operation unit. As a result, a still image of the subject in the photographing posture is acquired from the image of the subject photographed by the camera 45. If the subject's still image is acquired, the contour extracting unit 12 in the console unit 1 extracts the subject's contour information from the subject's still image. Based on this contour information, a contour image of the subject is displayed. The overlay display unit 13 superimposes the contour image of the subject and the image of the subject and displays them on the operation panel 11 in the console unit 1.

Description

  In the present invention, X-rays irradiated from an X-ray tube and irradiated to a subject via a collimator are detected by an X-ray detector, and an X-ray image detected by the X-ray detector is displayed on a display unit. The present invention relates to a line imaging apparatus.

  In a general X-ray imaging apparatus, an X-ray tube and a collimator are suspended from the ceiling in a state in which the X-ray tube and collimator can move in the X, Y, Z, and θ directions, and an X-ray imaging stand and an X-ray imaging table are on the floor surface. (See Patent Document 1). In such an X-ray imaging apparatus, the subject is positioned with respect to an X-ray imaging stand or an X-ray imaging table, and the X-ray tube is disposed at a position facing the subject, and then the operator moves from the imaging room. X-ray imaging is executed by moving to the operation room and operating a hand switch arranged in the imaging room.

  In addition, an X-ray imaging apparatus for round visits for taking images while visiting a hospital room has an X-ray tube and a collimator at the tip of an arm that can be moved up and down with respect to a support provided on a carriage, By driving a motor provided on the carriage, it is configured to move between hospital rooms electrically (see Patent Document 2). In such an X-ray imaging apparatus for round trips, the subject is positioned on the bed, an X-ray detector is disposed under the imaging region of the subject, and X is placed at a position facing the subject. After arranging the X-ray tube, the operator operates the hand switch from a position where the exposure dose is small, and X-ray imaging is executed.

JP 2011-72343 A JP 2007-535 A

  In the X-ray imaging apparatus described above, the operator moves to a position away from the subject after positioning the subject. That is, in a general X-ray imaging apparatus, the operator moves from the imaging room to the operation room, and in the X-ray imaging apparatus for round trips, the operator places a subject to avoid exposure. Will be away from the bed. For this reason, the operator keeps an eye on the subject between the completion of the positioning of the subject and the operation of the hand switch to execute the X-ray imaging.

  At this time, when the posture of the subject when actually performing X-ray imaging is different from the posture at the time of positioning, the X-ray image obtained by X-ray imaging may be different from the one intended by the operator There is. In such a case, it may be necessary to perform X-ray imaging again, which not only requires unnecessary time for X-ray imaging, but also causes a problem that extra exposure is given to the subject. .

  The present invention has been made to solve the above-described problems. When a subject moves between positioning and X-ray imaging, this is recognized and wasteful X-ray imaging is executed. An object of the present invention is to provide an X-ray imaging apparatus capable of preventing the above.

  According to the first aspect of the present invention, X-rays emitted from an X-ray tube and irradiated to a subject through a collimator are detected by an X-ray detector, and an X-ray image detected by the X-ray detector is detected. In the X-ray imaging apparatus displayed on the display unit, a camera capable of imaging the X-ray irradiation area of the subject, and an imaging operation for capturing a still image of the subject in the imaging posture by the camera A contour extracting means for extracting contour information of the subject from a still image of the subject in the photographing posture photographed by the camera, and the subject extracted by the contour extracting means. A superimposing display unit that superimposes the contour image of the subject based on contour information and the image of the subject photographed thereafter by the camera on the display unit. To do.

  According to a second aspect of the present invention, in the first aspect of the present invention, the camera is attached to the X-ray tube or the collimator.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the contour image of the subject and the contour of the subject image captured by the camera are used. Body movement determining means for determining the amount of movement of the subject's body, and warning display means for displaying a warning when the body movement determining means determines that the amount of movement of the subject's body is greater than or equal to a set value And further comprising.

  According to the first aspect of the present invention, when a subject moves between positioning and X-ray imaging, it is possible to prevent this from being recognized and performing unnecessary X-ray imaging. . As a result, it is possible to prevent X-ray imaging from being performed again and excessive exposure to the subject.

  According to the second aspect of the present invention, even when the X-ray tube and the collimator are moved, the subject can be properly imaged by the camera.

  According to the third aspect of the present invention, the warning is displayed when it is determined that the amount of movement of the subject's body is greater than or equal to the set value, so that the subject has moved more reliably. This makes it possible to more reliably prevent unnecessary X-ray imaging from being executed.

1 is a schematic diagram of an X-ray imaging apparatus according to the present invention. 1 is a perspective view of an X-ray tube support unit 4 and an imaging table 3 in an X-ray imaging apparatus according to the present invention. It is a block diagram which shows the main control systems of the X-ray imaging apparatus which concerns on this invention. 2 is a schematic diagram of a high voltage control device 2. FIG. It is a front view which shows the operation part 41 in the X-ray tube support part 4 with the X-ray tube 42 and the collimator 43. FIG. 4 is a schematic diagram schematically showing a display screen 90 displayed on the operation panel 11 of the console unit 1. FIG. It is a perspective view of the X-ray imaging apparatus which concerns on 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of an X-ray imaging apparatus according to the present invention. FIG. 2 is a perspective view of the imaging table 3 and the X-ray tube support 4 in the X-ray imaging apparatus according to the present invention. FIG. 3 is a block diagram showing a main control system of the X-ray imaging apparatus according to the present invention.

  The X-ray imaging apparatus according to the present invention performs imaging on the subject M and the console unit 1 and the high-voltage control device 2 installed in the operation room 101 for the operator to perform X-ray imaging operations. The imaging table 3, the imaging stand 5, and the X-ray tube support part 4 installed in the imaging room 100 are provided. The imaging room 100 and the operation room 101 are blocked by a partition wall 102.

  The console unit 1 installed in the operation room 101 includes an operation panel 11 including a display unit configured by a touch panel type liquid crystal display. As shown in FIG. 3, the console unit 1 is connected to a radiology information system (RIS) 103 which is a system for managing examination reservations, examination states, medicines, and examination statistics in the radiology department. Has been. As shown in FIG. 3, the console unit 1 includes a contour extraction unit 12, an overlay display unit 13, a body movement determination unit 14, and a warning display unit 15 which will be described later. The display unit of the operation panel 11 may be a general liquid crystal display instead of a touch panel type liquid crystal display.

  FIG. 4 is a schematic diagram of the high voltage control device 2.

  The high voltage control device 2 is disposed on the partition wall 102 in the operation chamber 101. As shown in FIGS. 3 and 4, the high-voltage control device 2 includes an operation panel 21 having a display unit 22 constituted by a touch panel type liquid crystal display, an input button 24, and an X-ray from an X-ray tube 42. And a hand switch 23 for starting the irradiation. The high voltage control device 2 is for setting tube voltage and tube current of the X-ray tube 42 or X-ray irradiation conditions such as X-ray irradiation time.

  The imaging table 3 is for imaging the subject M in a prone position, and houses a top plate 31 on which the subject M is placed and a flat panel detector 32 as an X-ray detector therein. And the elevating unit 34 for elevating and lowering the top plate 31 and the bucky unit 33. The bucky part 33 is horizontally movable in the G direction shown in FIG. The bucky portion 33 can be moved up and down in the F direction shown in FIG.

  The photographing stand 5 is for photographing the subject M in a standing position, a screen 54 for raising the subject M on the front surface thereof, and a flat panel detector as an X-ray detector inside thereof. And a bucky part 53 in which 52 is accommodated. The bucky portion 53 can be moved up and down in FIG.

  The X-ray tube support unit 4 includes a support unit 61 that can move in the A direction and the B direction perpendicular to the ceiling of the imaging room 100, a support unit 62 that extends downward from the support unit 61, and the support unit 62. The moving unit 63 that moves up and down in the C direction and pivots in the D direction and is pivotally supported by the lower end of the moving unit 63, and the operation unit 41, the X-ray tube 42, and the collimator 43 are integrated in the E direction. And a support shaft 64 to be rotated. For this reason, the X-ray tube 42 can move in the A, B, D, and E directions, and can move up and down in the C direction. An operation panel 44 is attached to the operation unit 41.

  FIG. 5 is a front view showing the operation unit 41 in the X-ray tube support unit 4 together with the X-ray tube 42 and the collimator 43.

  The operation unit 41 includes an operation panel 44. A display unit 46 composed of a touch panel type liquid crystal display is disposed at the center of the operation panel 44. Various switches are disposed around the display unit 46. One of these various switches functions as a photographing operation unit for photographing a still image of the subject M in the photographing posture with the camera 45 attached to the collimator 43, as will be described later. A shooting switch 51 is provided. The camera 45 attached to the collimator 43 includes an optical system capable of photographing the entire X-ray irradiation region from the X-ray tube 42 in the subject M.

  Next, an X-ray imaging operation by the X-ray imaging apparatus having the above configuration will be described. When X-ray imaging is performed by this X-ray imaging apparatus, the subject M is laid on the top plate 31 of the imaging table 3 at the time of standing-up imaging, and the screen 54 of the imaging stand 5 is used at the time of standing imaging. The subject M stands up on the front. Further, the X-ray tube 42, the collimator 43, and the like are moved to a facing position where the subject M is sandwiched between the flat panel detector 32 or the flat panel detector 52. Then, the subject M is photographed by the camera 45 attached to the collimator 43. An image of the subject M photographed by the camera 45 is displayed on the operation panel 11 in the console unit 1. This image may be displayed on the display unit 46 in the operation unit 41.

  FIG. 6 is a schematic diagram schematically showing a display screen 90 displayed on the operation panel 11 of the console unit 1.

  In this display screen 90, an area 91 for displaying an image of the subject M taken by the camera 45, an area 92 for displaying various menus, and the console unit 1 are acquired from the radiology information system 103 shown in FIG. A region 93 for displaying the patient name and ID number in the obtained imaging order information is formed.

  In this state, the operator positions the subject M. In this case, the posture of the subject M is set to a photographing posture suitable for X-ray photographing on the top 31 of the photographing table 3 or on the front surface of the partition 54 in the photographing stand 5. When the posture of the subject M becomes appropriate and the positioning of the subject M is completed, the operator presses the photographing switch 51 (see FIGS. 3 and 5) in the operation unit 41. Thereby, the still image of the subject M in the photographing posture is acquired from the image of the subject M photographed by the camera 45.

  If the still image of the subject M is acquired, the contour extracting unit 12 in the console unit 1 extracts the contour information of the subject M from the still image of the subject M. Based on this contour information, the contour image of the subject M is displayed in the area 91 of the display screen 90 displayed on the operation panel 11 of the console unit 1 as indicated by a broken line in FIG.

  Even after the contour image of the subject M is displayed in the area 91, the camera 45 continues to photograph the subject M. The overlay display unit 13 in the console unit 1 includes a contour image of the subject M based on the contour information of the subject M extracted by the contour extraction unit 12, and an image of the subject M captured by the camera 45. Are displayed on the operation panel 11 of the console unit 1. In FIG. 6, the image of the subject M displayed in the area 91 on the display screen 90 is indicated by a solid line.

  When the positioning of the subject M is completed, the operator moves from the imaging room 100 to the operation room 101 and confirms the display screen 90 displayed on the operation panel 11 of the console unit 1. In the case where the image of the subject M displayed in the area 91 of the display screen 90 indicated by the solid line in FIG. 6 and the contour information of the subject M after the completion of positioning indicated by the broken line are greatly shifted. It is determined that appropriate X-ray imaging cannot be performed due to the movement of the examiner's M, and positioning of the examinee M is performed again. On the other hand, when the deviation between the image of the subject M indicated by the solid line in FIG. 6 and the contour information of the subject M after the completion of the positioning indicated by the broken line is within the allowable range, the operator can use the high voltage control device 2. The X-ray imaging is executed by operating the hand switch 23 in FIG.

  In parallel with the above-described operation, the body movement determination unit 14 in the console unit 1 is based on the contour image of the subject M and the contour of the image of the subject M taken by the camera 45. The amount of body movement is always judged. In the case where the image of the subject M indicated by a solid line in FIG. 6 and the contour image of the subject M after completion of positioning indicated by a broken line are different from each other by a preset value or more, the body of the subject M Is determined to be greater than or equal to the set value. In this state, when the operator operates the hand switch 23 in the high voltage control device 2, the warning display unit 15 in the console unit 1 sets the movement amount of the subject M on the operation panel 11. A warning is displayed to warn you that the value is over the value. This warning display includes, for example, a character string “The patient may have moved since positioning. Check the patient's posture again.” Note that this warning display is not limited to the display on the operation panel 11, but may be performed simultaneously with a warning sound or the like.

  Next, another embodiment of the present invention will be described. FIG. 7 is a perspective view of an X-ray imaging apparatus according to the second embodiment of the present invention.

  This X-ray imaging apparatus is a round-trip X-ray imaging apparatus for performing imaging while visiting a hospital room. The column 71 is disposed on a carriage-like main body, and is movable up and down with respect to the column 71. , An X-ray tube 72 disposed at the tip of the arm 75, a collimator 73 disposed below the X-ray tube 72, and the X-ray tube 72 and the collimator 73 are moved. A handle 74 is provided. The X-ray imaging apparatus includes a flat panel detector 79 for detecting X-rays that are disposed on the lower side of the body of the subject M and irradiated from the X-ray tube 72 and passed through the subject M. And a storage portion 78 for storing the flat panel detector 79. Further, the X-ray imaging apparatus includes an operation panel 76 that functions in the same manner as the operation panel 11 in the above-described embodiment, a hand switch 77, a pair of left and right front wheels 81 that are direction changing wheels, and a driving wheel. And a pair of left and right rear wheels 82 and an operating handle 80 for operating the traveling direction of the apparatus. Similar to the embodiment described above, the collimator 73 is provided with a camera 45 for photographing the subject M and a photographing switch 51 for photographing a still image of the subject M by the camera 45.

  When using this X-ray imaging apparatus, the operator places the flat panel detector 79 below the subject M, positions the subject M, and connects the X-ray tube 72 to the subject M. Arrange at the opposite position. When the positioning of the subject M is completed, the operator checks the display screen displayed on the operation panel 76 while keeping a distance from the bed on which the subject M is placed in order to avoid exposure. The X-ray imaging is executed by the same operation as in the above-described embodiment.

  That is, as in the above-described embodiment, the display screen 90 displayed on the operation panel 76 is confirmed, and the image of the subject M indicated by the solid line in FIG. 6 and the contour information of the subject M after completion of the positioning indicated by the broken line Is significantly deviated, it is determined that appropriate X-ray imaging cannot be performed due to movement of the body of the subject M, and the positioning of the subject M is performed again. On the other hand, when the deviation between the image of the subject M indicated by the solid line in FIG. 6 and the contour information of the subject M after completion of the positioning indicated by the broken line is within the allowable range, the operator operates the hand switch 77. As a result, X-ray imaging is executed.

  As described above, in the X-ray imaging apparatus according to the present invention, when the subject M moves between positioning and X-ray imaging, this is recognized and wasteful X-ray imaging is executed. Can be prevented. For this reason, it is possible to prevent the X-ray imaging from being performed a plurality of times, and it is possible to prevent the subject M from being exposed excessively.

  In each of the above-described embodiments, the camera 45 for photographing the subject M is attached to the collimators 43 and 73. However, the camera 45 is attached to the X-ray tubes 42 and 72 and their holding members. You may make it attach to. As described above, by attaching the camera 45 to the X-ray tubes 42 and 72 and the collimators 43 and 73, even when the X-ray tubes 42 and 72 and the collimators 43 and 73 move, It becomes possible to photograph the irradiation area suitably.

  However, if X-ray imaging is performed with the subject M always placed at a predetermined position, the camera 45 can be used to image an X-ray irradiation area on the subject M, such as a ceiling or a column. You may make it fix to the place of.

  In any of the above-described embodiments, the body movement determination unit 14 in the console unit 1 makes a determination based on the contour image of the subject M and the contour of the image of the subject M taken by the camera 45. When the movement amount of the body of the subject M is greater than or equal to the set value, the warning display unit 15 displays a warning on the operation panels 11 and 76 when the operator operates the hand switches 23 and 77. Although employed, when the body movement determination unit 14 determines that the amount of movement of the body of the subject M is greater than or equal to the set value, a warning display is always displayed on the operation panels 11 and 76. Also good.

DESCRIPTION OF SYMBOLS 1 Console part 2 High voltage control apparatus 3 Imaging table 4 X-ray tube support part 5 Imaging stand 11 Operation panel 12 Contour extraction part 13 Overlay display part 14 Body movement determination part 15 Warning display part 21 Operation panel 23 Hand switch 31 Top plate 32 Flat panel detector 33 Bucky part 34 Lifting part 41 Operation part 42 X-ray tube 43 Collimator 44 Operation panel 45 Camera 46 Operation panel 51 Shooting switch 52 Flat panel detector 53 Bucky part 54 Screen 72 X-ray tube 73 Collimator 76 Operation panel 77 Hand Switch 78 Storage section 79 Flat panel detector 90 Display screen 100 Imaging room 101 Operation room 103 Radiology information system M Subject

Claims (3)

X-ray imaging apparatus for detecting X-rays emitted from an X-ray tube to a subject through a collimator with an X-ray detector and displaying an X-ray image detected by the X-ray detector on a display unit In
A camera capable of capturing an irradiation area of X-ray in said subject,
A shooting operation unit for shooting a still image of the subject in a shooting posture with the camera;
Contour extraction means for extracting contour information of the subject from the still image of the subject in the photographing posture photographed by the camera;
Overlaying the subject's contour image based on the subject's contour information extracted by the contour extracting means and the subject's image captured by the camera on the display unit in a superimposed manner Alignment display means;
X-ray imaging apparatus characterized by comprising a. The X-ray imaging apparatus according to claim 1,
The camera, X-rays imaging device which is attached to the X-ray tube or the collimator. The X-ray imaging apparatus according to claim 1 or 2,
Body movement determination means for determining the amount of movement of the subject's body based on the contour image of the subject and the contour of the image of the subject photographed thereafter by the camera;
Warning display means for displaying a warning when the body movement determination means determines that the amount of movement of the subject's body is greater than or equal to a set value;
An X-ray imaging apparatus further comprising:

Images