JP5959972B2 - X-ray diagnostic equipment - Google Patents

Description

  The present invention relates to an X-ray diagnostic apparatus that acquires an X-ray image of a subject in a desired posture by moving a bed on which the subject is loaded, and in particular, a camera used for checking the safety of the subject when the bed is moved. Regarding display of images.

  There is an X-ray diagnostic apparatus that acquires an X-ray image of a subject at a desired posture by moving a bed on which the subject is loaded. When the operator controls the movement of the bed, the operator performs the operation while confirming the safety of the subject on the bed. As a confirmation method, there are a visual method and a method using a camera image provided with a dedicated camera for confirming the safety of the subject. In Patent Document 1, an X-ray image and a camera image of a subject photographed by a camera are simultaneously displayed on the same monitor, so that the viewpoint movement distance between the X-ray image and the camera image by the operator can be determined. There is a description of an X-ray imaging system that reduces the amount of X-ray images while confirming the safety of the subject.

JP 2006-34669 A

  In Patent Document 1, since an X-ray image and a camera image are always displayed on the same monitor at the same time, it is necessary to always reduce the display size with respect to the size of the monitor. When one image is superimposed on the other, one image is always displayed in a reduced size. In either case, the display area is limited and an X-ray image or camera image can be viewed with a good size. There is a problem that can not be.

  In view of the above problems, the present invention provides an X-ray diagnostic apparatus capable of viewing an X-ray image and a camera image at a suitable size while displaying the X-ray image and the camera image on the same display device. The purpose is to do.

In order to solve the above problems, X-ray diagnostic apparatus according to the present invention, a camera for imaging a subject on the bed, the obtained X - ray Zomata selects one of the camera image acquired by the camera Display A display image selection unit to be displayed on the unit, and the display image selection unit selects an image to be displayed on the display unit based on the position of the bed.

  According to the present invention, it is possible to provide an X-ray diagnostic apparatus capable of viewing an X-ray image and a camera image in a suitable size while displaying the X-ray image and the camera image on the same display device. .

Schematic configuration diagram of an X-ray diagnostic apparatus applied in the present invention Functional block diagram for explaining the first embodiment The figure for demonstrating the detail of Example 1 Flowchart explaining the operation sequence of the first embodiment The figure for demonstrating the detail of Example 2

  Hereinafter, embodiments of an X-ray diagnostic apparatus according to the present invention will be described in detail with reference to the accompanying drawings. In all the drawings for explaining the embodiments of the present invention, those having the same function are denoted by the same reference numerals, and repeated explanation thereof is omitted.

An X-ray diagnostic apparatus applied in the present invention will be described with reference to FIG.
FIG. 1 is a schematic configuration diagram of an X-ray diagnostic apparatus applied in the present invention.

  The X-ray diagnostic apparatus 1 of the present invention includes an X-ray generator 102 that irradiates a subject 101 with X-rays, an X-ray high voltage generator 103 that supplies power to the X-ray generator 102, and an X-ray for the subject 101. X-ray diaphragm device 104 for setting a radiation irradiation region, X-ray detection unit 105 for detecting X-rays emitted from X-ray generation unit 102, and X-ray data detected by X-ray detection unit 105 An X-ray image processing unit 106 for generating a line image, an image storage unit 107 for storing the X-ray image generated by the X-ray image processing unit 106, and an X-ray image generated by the X-ray image processing unit 106, or A display unit 108 that displays an X-ray image stored in the image storage unit 107 or a camera image acquired by a camera 113 described later, a bed 109 on which the subject 101 is placed, and a column that supports the X-ray generation unit 102 110, a bed moving mechanism 111 for moving the bed 109, and a bed position detecting unit 112 for detecting the position of the bed 109 moved by the bed moving mechanism 111 The X-ray image generated by the X-ray image processing unit 106 and the image storage unit 107 are stored in the display unit 108 and the camera 113 for imaging the subject 101 on the bed 109 and confirming the safety of the subject 101. A display image selection unit 114 that selects and displays either the X-ray image or the camera image acquired by the camera 113, a control unit 115 that controls these components, and an operator for the control unit 115. And an operation unit 117 for transmitting 116 instructions.

  The X-ray generator 102 has an X-ray tube that receives power supply from the X-ray high voltage generator 103 and generates X-rays. Further, the X-ray generation unit 102 may include an X-ray filter that selectively transmits X-rays having specific energy.

  The X-ray aperture device 104 has a plurality of movable restriction blades that shield X-rays generated from the X-ray generation unit 102, and moves by controlling each of the plurality of movable restriction blades (not shown in particular) to Determine the X-ray irradiation area.

  The X-ray detection unit 105 is configured by, for example, a plurality of detection elements that detect X-rays arranged in a two-dimensional array, and the incident of X-rays irradiated from the X-ray generation unit 102 and transmitted through the subject It is a device that detects X-ray signals according to the quantity.

  The X-ray image processing unit 106 performs image processing on the X-ray data output from the X-ray detection unit 105, and outputs an X-ray image subjected to image processing. Image processing includes gamma conversion, gradation conversion processing, image enlargement / reduction, and the like.

  There are two types of X-ray images. One is an X-ray image and the other is an X-ray fluoroscopic image. These are generally obtained by a photographing method called photographing and fluoroscopy. In imaging, a clear X-ray image is acquired as a still image with respect to the region of interest of the subject 101, and in fluoroscopy, the movement of each part in the region of interest of the subject 101 is acquired as a moving image. In imaging, a tube voltage applied to the X-ray tube is large for fluoroscopy in order to acquire a clear X-ray image. In fluoroscopy, X-ray irradiation time is long for imaging in order to acquire a moving image.

  The bed moving mechanism unit 111 is composed of a motor, a rack, a pinion, and the like, and performs a moving operation such as a so-called reverse rotation in which the head of the subject 101 on the bed 109 descends from the foot or a vertical movement with respect to the floor surface. This is performed for the bed 109. The bed moving mechanism unit 111 is operated by the operator 116 via a bed movement control unit 122 arranged in the control unit 115 using a joystick (not shown) provided in the operation unit 117 or the like.

  Each component of the X-ray diagnostic apparatus 1 of the present invention is disposed in an examination room 118 and an operation room 119, respectively. Between the examination room 118 and the operation room 119, a wall 120 containing lead that prevents X-ray transmission, and lead that prevents the X-ray transmission and allows the operator 116 to visually check the state of the subject 101. It is partitioned by glass 121. Thus, it is possible to avoid invalid exposure to the operator 116 due to scattered X-rays or the like when acquiring an X-ray image.

Next, Example 1 of the present invention will be described with reference to FIGS.
FIG. 2 is a functional block diagram for explaining the present embodiment. FIG. 3 is a diagram for explaining the details of the present embodiment, and is a diagram showing the relationship between the tilt of the bed 109 and the image displayed on the display unit 108. FIG. 4 is a flowchart for explaining the operation sequence of the X-ray diagnostic apparatus 1 of the present embodiment.

  In the first embodiment, the relationship between the tilt of the bed 109, the X-ray image displayed on the display unit 108, and the camera image will be described.

  The display unit 108 includes a subject information display area 302 that displays information such as an X-ray irradiation condition of the subject 101 in the display area 301, an X-ray image, a fluoroscopic image, and a camera image of the subject 101. An image display area 303 for displaying any one of the above.

  As shown in FIG. 3A, when the X-ray image 304 of the subject 101 in the standing position is acquired, the acquired X-ray image 304 is displayed in the image display area 303 in the display unit 108. The operator 116 looks at the X-ray photographed image 304 displayed in the image display area 303 and confirms whether the photographing has been performed without any problem. At this time, the angle θ of the bed is 90 °. Next, when it is desired to obtain an X-ray image of the subject 101 in the supine position, the operator 116 rotates the bed 109 using the operation unit 117. During the rotational movement of the bed 109, the operator 116 visually checks through the lead glass 121 whether the subject 101 is in a dangerous state such as protruding from the bed 109.

  As shown in FIG. 3 (b), when the bed angle θ reaches 180 °, an X-ray image 305 of the subject 101 in the lying position is acquired. The acquired X-ray image 305 is displayed in the image display area 303 instead of the standing X-ray image 304 displayed so far. As in the standing position, the operator 116 looks at the X-ray photographed image 305 displayed in the image display area 303 and confirms whether photographing has been performed without any problem.

  Next, when it is desired to obtain an X-ray image of the subject 101 at a reverse tilt, the operator 116 further rotates the bed 109 using the operation unit 117. In FIG. 3 (c), the bed 109 is rotated until the bed angle θ reaches 210 °. At this time, since the subject 101 on the bed 109 becomes a blind spot from the lead glass 121, the operator 116 cannot confirm the state of the subject 101 from the lead glass 121 while the bed 109 is rotating.

  Therefore, in the X-ray diagnostic apparatus 1 of the present embodiment, the bed angle θ is equal to or larger than a preset bed angle threshold θth (for example, 190 °) at which the state of the subject 101 on the bed 109 from the lead glass 121 becomes a blind spot. When the couch position detecting unit 112 detects that, the display image selecting unit 114 generates an image to be displayed in the image display area 303 based on the detection result by the X-ray image processing unit 106 that has been displayed so far. The camera image 306 acquired by the camera 113 is switched from the acquired X-ray image or the X-ray image stored in the image storage unit 107. Thereby, even when the state of the subject 101 on the bed 109 from the lead glass 121 becomes a blind spot, the state of the subject 101 can be confirmed in the image display region 303, and the display image is switched, which is preferable. You can see the camera image in size.

  In addition, even when the bed angle θ is equal to or greater than θth, when a new X-ray image of the subject 101 is acquired, the acquired X-ray image is only displayed for a predetermined display time Ts. Instead, the image is displayed in the image display area 303. The display time Ts of the X-ray image at this time is for confirming whether the imaging was performed without any problem, and may be as short as about 5 seconds, for example.

  The display time Ts can also be adjusted by the operator 116 using a display time setting unit (not shown). When the adjustment is performed, the display image selection unit 114 displays the X-ray image in the image display area 303 based on the time set in the display time setting unit. The imaging is performed in a state in which the bed movement is stopped rather than the bed movement that is relatively dangerous for the subject 101. The display of the X-ray image is also performed with the bed movement stopped, and when the bed movement is started by the operator 116 within 5 seconds, the display image selection unit 114 displays the X displayed on the image display area 303. The line-captured image is switched to the camera image 306 acquired by the camera 113. Thereby, since it is not necessary for the operator 116 to switch the display image, the operation by the operator 116 can be reduced.

Next, the operation sequence of the present embodiment will be described with reference to the flowchart shown in FIG.
In step S401, the bed position detection unit 112 detects the bed angle θ of the bed 109.

  In step S402, the display image selection unit 114 determines whether or not the bed angle θ is equal to or larger than a bed angle threshold value θth set in advance. If the couch angle θ is equal to or greater than the couch angle threshold θth, the process proceeds to step S403, and if the couch angle θ is less than the couch angle threshold θth, the process proceeds to step S406.

  In step S403, the display image selection unit 114 determines the presence or absence of the acquired X-ray image. If there is an acquired X-ray image, the process proceeds to step S404. If there is no acquired X-ray image, the process proceeds to step S405.

  In step S404, the display image selection unit 114 causes the acquired X-ray image to be displayed in the image display area 303 in the display unit 108 for a preset display time Ts. When the display time Ts elapses, the process proceeds to step S405. At this time, if the operator 116 starts rotating the bed even if it is less than the display time Ts, the process proceeds to step S405.

  In step S405, the display image selection unit 114 causes the camera image acquired by the camera 113 to be displayed in the image display area 303 in the display unit 108, and then the process returns to step S401.

  In step S406, the display image selection unit 114 determines the presence or absence of the acquired X-ray image. If there is an acquired X-ray image, the process proceeds to step S407, and if there is no acquired X-ray image, the process proceeds to step S405.

  In step S407, the display image selection unit 114 displays the acquired X-ray image in the image display area 303 in the display unit.

  As described above, the X-ray diagnostic apparatus 1 according to the present embodiment has the bed 109 more than the predetermined bed angle θ at which the state of the subject 101 on the bed 109 from the lead glass 121 becomes a blind spot with respect to the operator 116. The camera image 306 is displayed in the image display area 303 only when the camera image 306 is necessary to confirm the state of the subject 101, and the acquired X-ray image is displayed at other bed angles. Since the X-ray images 304 and 305 and the camera image 306 are displayed on the same display unit 108, the images can be confirmed with a suitable display size.

Next, Example 2 of the present invention will be described with reference to FIG.
FIG. 5 is a diagram for explaining the details of the present embodiment, and is a diagram showing the relationship between the tilt of the bed 109 and the image displayed on the display unit 108.

  In the first embodiment, the relationship between the tilt of the bed 109, the X-ray photographed image displayed on the display unit 108, and the camera image has been described, but in the second embodiment, an X-ray fluoroscopic image is used instead of the X-ray photographed image. Will be described.

  As described above, the difference between the X-ray image and the X-ray fluoroscopic image is a still image, and the X-ray fluoroscopic image is a moving image. Further, the X-ray fluoroscopic image will be further described. The X-ray fluoroscopic image may be acquired while rotating the bed in order to observe the movement of the value or the like in the subject. In this embodiment, as shown in FIG. 5, the X-ray fluoroscopic image 501 and the camera image 502 are simultaneously displayed in the image display area 303 only at the bed angle at which the subject 101 is tilted backward. At this time, the camera image 502 is displayed at the corner of the image display area 303 with a smaller display size than the X-ray fluoroscopic image 501. This is because it is necessary to see the details of the image in the X-ray fluoroscopic image 501. The display size and display position of the camera image 502 can be adjusted by a camera image display adjustment button (not shown) provided in the operation unit 117. The camera image display adjustment button has a function of setting whether to display the camera image 502 superimposed on the X-ray fluoroscopic image 501 or not. In the case where the subject 101 is at the bed angle θ where the subject 101 is in the standing position and the prone position, that is, when the state of the subject 101 can be visually confirmed through the lead glass, only the fluoroscopic image 501 is always displayed in the image display area 303 Is displayed.

  As described above, the X-ray diagnostic apparatus 1 according to the present embodiment allows the X-ray fluoroscopic image 501 and the camera to be simultaneously displayed on the same display unit 108 only when the bed angle θ is a blind spot from the operator 116. When the image is displayed as 502 and only the bed angle θ other than that is displayed, only the X-ray fluoroscopic image 501 is always displayed in the image display area 303. Therefore, the X-ray fluoroscopic image and the camera image can be viewed at a suitable size. it can.

  1 X-ray diagnostic device, 101 subject, 102 X-ray generator, 103 X-ray high voltage generator, 104 X-ray diaphragm, 105 X-ray detector, 106 X-ray image processor, 107 image storage, 108 display Unit, 109 bed, 110 column, 111 bed moving mechanism, 112 bed position detection unit, 113 camera, 114 display image selection unit, 115 control unit, 116 operator, 117 operation unit, 118 examination room, 119 operation room, 120 Wall, 121 Lead glass, 301 Display area, 302 Subject information display area, 303 Image display area, 304 X-ray image, 305 X-ray image, 306 Camera image, 501 X-ray image, 502 Camera image

Claims (7)

An X-ray generator that irradiates the subject with X-rays, an X-ray detector that detects X-rays emitted from the X-ray generator, and an X-ray based on the X-ray data detected by the X-ray detector An X-ray image processing unit that generates a line image, a display unit that displays the X-ray image, a bed on which the subject is placed, a bed moving mechanism unit that moves the bed, and the bed moving mechanism unit An X-ray diagnostic apparatus comprising: an operation unit that performs a movement operation of the bed using a bed position detection unit that detects a position of the bed moved by the bed moving mechanism unit;
A camera for imaging a subject on the bed, the X - ray Zomata has a display image selecting unit to be displayed on the front Symbol display unit selects one of the acquired camera image by the camera, the display The X-ray diagnostic apparatus, wherein the image selection unit selects an image to be displayed on the display unit based on the position of the bed detected by the bed position detection unit.   The X-ray image is an X-ray image, and the display image selection is performed when a preset position of the bed where the subject on the bed cannot be visually confirmed by an operator who operates the operation unit. The X-ray diagnosis apparatus according to claim 1, wherein the unit selects the camera image, selects the X-ray image at other positions of the bed, and displays the X-ray image on the display unit.   When a new X-ray image is acquired while the camera image is displayed on the display unit, the display image selection unit replaces the camera image displayed on the display unit with a predetermined time. The X-ray diagnostic apparatus according to claim 2, wherein the acquired X-ray image is selected as an image to be displayed on the display unit.   The display image selection unit selects the camera image as an image to be displayed on the display unit instead of the X-ray image when the bed moves within the predetermined time. The X-ray diagnostic apparatus described.   The X-ray diagnostic apparatus according to claim 3, further comprising a display time setting unit that adjusts the predetermined time. The X-ray image is an X-ray fluoroscopic image, when a position before Symbol preset the bed visually from the operator can not confirm the subject on the bed by operating the operation unit, the display image The selection unit selects both the X-ray fluoroscopic image and the camera image, and selects the X-ray fluoroscopic image at other positions of the bed and displays the X-ray fluoroscopic image on the display unit. X-ray diagnostic apparatus according to.   The X-ray diagnostic apparatus according to claim 6, wherein when the X-ray fluoroscopic image and the camera image are simultaneously displayed on the display unit, a display size of the camera image is smaller than the X-ray fluoroscopic image. .

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