JPH048074A - Digital x-ray radiographing device - Google Patents

Abstract

PURPOSE:To display a pickup image onto a display device when tomology is observed by the display device and picked up in a proper timing by providing a changeover means selecting a signal of a tomology picture and a signal of a video image picture and inputting the signal to the above display device to a pre-stage of the display device. CONSTITUTION:An operation switch 16 of an operation section 8 at first sets X-ray condition and other operating conditions to a radiographing base 11. In this state, when a reagent 13 is subjected to radiographing at first, a tomology switch 17 is turned on and a changeover switch 21 of a changeover means 10 is thrown manually to a position of a 1st contact A. Then the tomology image of the reagent 13 is displayed on a screen of a display device 7 via the 1st contact A and the changeover switch 21. When the reagent 13 is picked up, a pickup switch 18 is turned on and the changeover switch 21 of the changeover means 10 is thrown to the position of a 2nd contact B. Then a signal from the pickup switch 18 is inputted to a picture processing control section 9 and the output optical image of a detector 2 is picked up by a telecamera 3.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a digital X-ray fluoroscopic imaging device that irradiates a subject with X-rays to perform fluoroscopy and imaging, and in particular, the present invention relates to a digital The present invention relates to a digital X-ray fluoroscopic imaging device that can display a captured image on the display device when an image is captured at an appropriate timing.

[Conventional technology]

In conventional digital X-ray fluoroscopic imaging equipment, to image the gastrointestinal tract, for example, X-rays are emitted from the X-ray tube to a subject lying on a table, and the transmitted X-rays are transmitted through an image intensifier. The output optical image is captured by a television camera, and the transparent image is displayed on a display device such as a television monitor for observation.
An output optical image from the detector was photographed at an appropriate timing using, for example, a spot camera.

[Problem to be solved by the invention]

However, in such conventional digital X-ray fluoroscopic imaging equipment, when taking images with the spot camera, the output optical image from the detector is guided to the spot camera side by a distributor. The photographed image could hardly be observed on a display device. A television camera was used to photograph the light that momentarily passed through the distributor's half mirror.

The image was only displayed temporarily on the screen of the display device. In this case, the screen of the display device will only become bright momentarily, and the X-ray tube will emit X-rays to the subject, and the transmitted X-rays will only be used to confirm whether or not the imaging was performed normally. Ta. Therefore, it is not possible to observe the actually photographed image on the screen of the display device on the spot, and it is completely unclear whether or not the desired image has been photographed. For this reason, when the imaging fails, a re-examination has to be carried out, reducing efficiency.

Therefore, one aspect of the present invention is to solve these problems and provide digital X-ray fluoroscopic imaging, which is capable of displaying the photographed image on the display device when the fluoroscopic image is photographed at an appropriate timing while being observed on the display device. The purpose is to provide equipment.

[Means for Solving the Problem] In order to achieve the above object, the digital
The X-ray fluoroscopic imaging device performs X-rays on a subject lying on a table.
An X-ray tube that emits rays, a detector that is placed opposite to the X-ray tube with the table in between and converts the X-rays transmitted through the subject into visible light, and a television that takes an optical image output from this detector. A camera, an A/D converter that digitizes the video signal from the television camera, an image processor that processes this digitized image data, and a D/D converter that converts the processed image data into a video signal. A conversion section.

A digital X-ray system that includes a display device that inputs this video signal and displays an image, an operation section that has a fluoroscopic switch and a photographing switch, and an image processing control section that controls the image processing section using signals from the operation section. In the fluoroscopic imaging device, a switching means is provided upstream of the display device for switching between a fluoroscopic image signal and a photographed image signal and inputting the signals to the display device.

Further, the switching means may be configured to automatically switch based on a fluoroscopy start signal from a fluoroscopy switch of the operating section and a photography start signal from a photography switch.

[For production]

The digital XG fluoroscopic imaging device configured in this way is
An image signal switching means provided upstream of the display device operates to switch between a fluoroscopic image signal and a photographed image signal and input them to the display device. Thereby, when a transparent image is photographed at an appropriate timing while being observed on the display device, the photographed image can be displayed on the display device.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an embodiment of a digital XG fluoroscopic imaging apparatus according to the present invention. This digital X-ray fluoroscopic imaging device irradiates a subject with X-rays to perform fluoroscopy and imaging of, for example, the digestive tract.As shown in the figure, it consists of an X-ray tube 1, a detector 2, and a television camera. 3 and A/D converter 4
, an image processing section 5 , a D/A conversion section 6 , and a display device 17
, an operation section 8 , and an image processing control section 9 , and further includes a switching means 10 .

The X-ray tube 1 is placed on a subject 13 lying on a table 12 of a fluoroscopy table 11. ! For example, it is provided below the table 12. Note that the reference numeral 14 indicates an X-ray diaphragm that collimates the X-rays emitted from the X-ray tube 1. The detector 2 converts the X-rays emitted from the XS tube 1 and transmitted through the subject 13 into visible light into visible light. It is arranged opposite to the X-ray tube 1 with a table 12 in between.

The television camera 3 captures an output optical image from the detector 2 to generate a video signal, and is optically connected to a distributor 15 provided on the output side of the detector 2.

The A/D converter 4 digitizes the video signal output from the television camera 3. Further, the image processing section 5 receives the image data digitized by the A/D conversion section 4, processes it, and stores it.

Furthermore, the D/A converter 6 receives the image data processed by the image processor 5 and converts it into a video signal. 1 display device 7 includes the D/A converter 6
A device that inputs analog-converted video signals and displays images, and consists of, for example, a television monitor.

Note that, in addition to the output signal line 3b to the A/D converter 4, an output signal line 3a extending directly to the display device 7 extends from the television camera 3.

The operation unit 8 sets X-ray conditions for the entire device,
It sends out control commands for fluoroscopy and imaging, and includes an operation switch 16 for the fluoroscopy imaging table]-1, a fluoroscopy switch 17 consisting of, for example, a foot switch that commands the start and stop of fluoroscopy, and a photography switch that commands the start and stop of imaging. 1
It has 8.

The image processing control section 9 controls the operation of the image processing section 5 based on control signals sent from the operation section 8.

In FIG. 1, reference numeral 19 indicates a high voltage generator that generates a high voltage to be applied to the X-ray tube 1 according to a control signal from the operating section 8, and reference numeral 20 indicates a high voltage generator that generates a high voltage to be applied to the X-ray tube 1 according to a control signal from the operating section 8. A fluoroscopic imaging table controller that controls the operation of the fluoroscopic imaging table 11 is shown.

Here, in the present invention, one
Image signal switching means 10 is provided. This switching means 10 switches between a fluoroscopic image signal and a photographed image signal from the television camera 3 and inputs the signals to the display device 7, and connects the output signal line 3a directly from the television camera 3 to the display device 7. The connected first contact A and the TV camera 3 to the A/D converter 4 and the image processor 5 and D
It consists of a second contact B connected to the image processing system that sends the image to the display device 7 via the /A converter 6, and a changeover switch 21 that switches between these contacts A and B and connects them to the display device 7. .

Next, the operation of the digital X-ray fluoroscopic imaging apparatus configured as described above will be explained. First, X-ray conditions and other operating conditions are set for the fluoroscopy table 11 using the operation switch 16 of the operation unit 8. In this state, the subject 13 is first subjected to fluoroscopy, and the fluoroscopy switch 17 is turned on, and the changeover switch 21 of the switching means 10 is connected to the first contact A side, for example, manually. Then, a signal from the transparent switch 17 is input to the high voltage generator 19.

A high voltage is applied to the X-ray tube 1 from this high voltage generator 19 . As a result, X-rays of a predetermined intensity are emitted from the X-ray tube 1, collimated by the X-ray diaphragm 14, transmitted through the subject 13 placed on the table 12, and incident on the detector 2. This detector 2 converts the transmitted X-rays into visible light, and the output optical image is transmitted to the distributor 1
5 and is imaged onto the input surface of the television camera 3. and.

An output optical image is taken by the television camera 3, and the video signal is transmitted to one output signal line 3a and the switching means 10.
is input to the display device 7 through the first contact A and the changeover switch 21, and the transparent image of the subject 13 is displayed on the screen. Thereafter, the perspective switch 17 is turned off.

Next, suppose that the subject 13 is to be photographed, and this time the photographing switch 18 is turned on, and the changeover switch 21 of the changeover means 10 is connected to the second contact B side. Then, a signal from the photographing switch 18 is input to the image processing control section 9, and control signals are sent from the image processing control section 9 to the high voltage generator 19 and the image processing section 5, respectively. As a result, X-ray radiation is performed in the same manner as described above, and the
The transmitted X-rays 3 are converted into visible light, and an output optical image of the detector 2 is photographed by a television camera 3. The video signal from the television camera 3 is then input to the A/D converter 4 via the other output signal line 3b, digitized, processed by the image processor 5, and then D/D converter 4. A converter 6
The signal is converted into an analog signal and converted into a video signal again. This video signal is input to the display device 7 via the second contact B of the switching means 10 and the changeover switch 21, and the photographed image of the subject 13 is displayed on the screen. After that, the photographing switch 18 is turned off.

FIG. 2 is a block diagram showing a second embodiment of the present invention. In this embodiment, the image processing control section 9 and the switching means 10
are connected by a signal line 22, and the changeover switch 21 of the switching means 10 is automatically switched based on the fluoroscopy start signal from the fluoroscopy switch 17 of the operating section 8 and the imaging start signal from the imaging switch 18. It is something. The switching operation of the changeover switch 21 in this case is as shown in FIG. 3. At the time t when the see-through switch 17 is turned on in FIG. 21 is connected to the first contact A side. Next, at time t2 when the fluoroscopy switch 17 is turned off and the photographing switch 18 is turned on in FIG. 3(b),
As shown in FIG. 3(c), the changeover switch 21 is switched to the second contact B side. After that, the photographing switch 18
is turned off, and the see-through switch 17 is turned off in FIG. 3(a).
At time t3 when is turned on again, the changeover switch 21 is again switched to the first contact A side, as shown in FIG. In this way, by turning on the fluoroscopy switch 17 and the photographing switch 18 at the required timings, the changeover switch 21 of the switching means 10 is automatically switched between contacts A and B, and the signal of the fluoroscopic image and the photographed image are It is possible to input the signal to the display device 7 by switching between the signals.

FIG. 4 is a timing diagram showing another example of the switching operation of the changeover switch 21. In this case, an example is shown in which the perspective switch 17 is always turned on as shown in FIG. 4(a), and the photographing switch 18 is turned on at a required timing as shown in FIG. 4(b). In this example, the transparent switch 17 shown in FIGS. 4(a) and 4(b)
The image processing control section 9 inputs these signals without directly using the signals from the photographing switch 18 and the photographing switch 18.
), a signal S is generated that sets the fluoroscopic state only when the photographing switch 18 is off, and this fluoroscopic state signal S
is used to switch the switching means 10. That is, at time t, the perspective state signal S is turned on as shown in FIG. 4(c), so the changeover switch 21 is connected to the first contact A side as shown in FIG. 4(d). Next, at time t2, the photographing switch 18 is turned on as shown in FIG. 4(b), and the fluoroscopy state signal S is turned off as shown in FIG. 4(c). As shown in d), the changeover switch 21 is switched to the second contact B side. Thereafter, at time t, the perspective state signal S is turned on again as shown in FIG. 4(c), so
), the changeover switch 21 is again switched to the first contact A side. In this way.

By turning on the imaging switch 18 at the required timing with the fluoroscopy switch 17 always on, the changeover switch 21 is automatically switched between contacts A and B, and the fluoroscopic image signal and the photographed image signal are switched. can be input to the display device 7.

In addition to the method for realizing image switching described above,
In order to better observe the photographed image, the operation unit 8 may be provided with a switch for displaying the photographed image regardless of the fluoroscopic state.

〔Effect of the invention〕

Since the present invention is configured as described above, the image signal switching means 1° provided at the front stage of the display device 7 switches between the signal of the fluoroscopic image and the signal of the photographed image.
7 can be input. Thereby, when a transparent image is photographed at an appropriate timing while being observed on the display device [7], the photographed image can be displayed on the display device [7]. Therefore, the actually photographed image is displayed on the screen of the display device 7 on the spot! It is possible to determine whether or not a desired image has been captured. Therefore, if the desired image cannot be obtained and the photographing is a failure, it is sufficient to immediately perform re-photographing, thereby preventing a decrease in efficiency.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the digital X@fluoroscopic imaging device according to the present invention, Fig. 2 is a block diagram showing a second embodiment of the invention, and Fig. 3 is an example of the switching operation of the changeover switch. FIG. 4 is a timing diagram showing another example of the switching operation of the changeover switch. DESCRIPTION OF SYMBOLS 1... X-ray tube, 2... Inspection device, 3... Television camera, 4... A/D conversion section, 5... Image processing section, 6... D/A conversion section, 7...Display device, 8
...Operation unit, 9...Image processing control unit, 10...
- Switching means, 12... Table, 13... Subject, 17... Fluoroscopic switch, 18... Imaging switch, 21... Changeover switch, 22... Signal line, A... No. First contact, B... second contact.

Claims (2)

[Claims] (1) An X-ray tube that emits X-rays to a subject lying on a table, and a detection device that is placed opposite the X-ray tube with the table in between and converts the transmitted X-rays of the subject into visible light. a television camera that captures the output optical image of the detector; and an A/C that digitizes the video signal from the television camera.
a D conversion section, an image processing section that processes this digitized image data, a D/A conversion section that converts this processed image data into a video signal, and a display that inputs this video signal and displays an image. A digital X-ray fluoroscopic imaging apparatus comprising: a device, an operating section having a fluoroscopy switch and an imaging switch, and an image processing control section that controls the image processing section based on a signal from the operating section; 1. A digital X-ray fluoroscopic imaging apparatus, comprising a switching means for switching between a fluoroscopic image signal and a photographed image signal and inputting the signal to the display device. (2) The digital X-ray device according to claim 1, wherein the switching means is configured to automatically switch based on a fluoroscopy start signal from a fluoroscopy switch of the operating section and a radiography start signal from a radiographing switch. Fluoroscopic imaging device.