JPH11261892A - Fluoroscopic image pickup table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower a cost without enlarging the size of the depth direction of an II (image intensifier) for the X-ray images of a large visual field size and to instantaneously observe the images. SOLUTION: A planar two-dimensional X-ray detector 101 is used for an X-ray image recording medium and the planar two-dimensional X-ray detector 101 is provided with a quick photographing device 6' capable of quickly photographing the X-ray images. The quick photographing device 6' uses the planar two-dimensional X-ray detector 101 for the X-ray image recording medium and quickly photographs the X-ray images in the planar two-dimensional X-ray detector 101. In this case, the planar two-dimensional X-ray detector 101 obtains the X-ray images of the large visual field size at a low cost. Also, the size of the depth direction is substantially reduced and mounting to the fluorographic table is extremely facilitated. Also, the immediacy of X-ray image observation is not lost and the images are observed instantaneously similarly to the case of using the II.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray fluoroscopy table suitable for digital radiography provided with a rapid-release device.

[0002]

2. Description of the Related Art As shown in FIG. 2, a conventional X-ray fluoroscopy table has a top plate 3 movably guided vertically and horizontally on a table support frame 2 rotatably supported by a support table 1. As shown in FIG. , An X-ray tube device 5 is disposed above, and a cassetteless photographing device 6 is disposed below. Then, X emitted from the X-ray tube device 5
The rays penetrate the subject 4 placed on the top 3 and are imaged by an X-ray television 8 via an image intensifier (hereinafter, referred to as II) 7 attached to the above-described rapid-moving device 6. Thus, an X-ray image is obtained.

[0003] The above-mentioned flash photography device 6 usually takes out an unphotographed X-ray film, which is an X-ray image recording medium, stored in a supply magazine one by one, and removes the film by operating an operation switch by an operator. An X-ray image (X-ray photograph) of the subject 4 is obtained by quickly moving to the center of the X-ray irradiation field.

Here, by providing a digital image processing apparatus for processing, displaying, and recording a signal of the X-ray television 8, I.D. I. 7, a digital radiography (hereinafter, referred to as IIDR) system can be constructed.

The above I. I. In No. 7, since the one having a low yield and a large visual field size is expensive and the size in the depth direction is large, the visual field size is currently 12 inches to 16 inches max. For this reason, I.
I. The DR system is mainly configured and used for gastrointestinal diagnosis. Therefore, the large-size X-ray image is a film image obtained by the above-mentioned cassetteeless photography device 6,
Other than that, a combination type system that uses DR (digital radiography) images and an I.P. I. There is a DR-only system.

[0006]

In order to obtain an X-ray image using a conventional X-ray fluoroscopy table, an X-ray latent image is generated on a film by a cassette-speed photographing apparatus 6 and the X-ray latent image is developed and processed. Obtaining a line image, or I. An X-ray image is displayed on a CRT monitor by constructing a DR system, or an X-ray image is obtained by outputting a film using a printer. Here, the image on the film is a large size (for example, half cut:
354 mm x 430 mm), but development is essential (at least 30 seconds of development time is required)
Therefore, it is impossible to take a picture and immediately observe the image.

On the other hand, I. I. The DR system performs instant image processing using an X-ray television signal and can instantaneously display the image on a CRT monitor. Since the recorded image can be evaluated immediately, there is no need for re-imaging later, and necessary imaging can be performed each time, so that a highly reliable image can be obtained. However, the current I. I. With the manufacturing technology of No. 7, considering the price on a commercial basis, the field of view of 16 inches / 400φ is the largest. In addition, I. I. 7 has a problem that when the field size (diameter) is increased, the depth direction is also increased, and it becomes difficult to mount it on a see-through table.

An object of the present invention is to provide an X-ray image having a large field of view by I.D. I. An object of the present invention is to provide an X-ray fluoroscopy table which can be mounted on a fluoroscopy table easily and at low cost without increasing the size in the depth direction of the apparatus, and in which an image can be observed immediately.

[0009]

The object of the present invention is to use a flat two-dimensional X-ray detector for an X-ray image recording medium and to use the flat two-dimensional X-ray detector.
This is achieved by providing a rapid imaging device capable of rapidly capturing an X-ray image in the two-dimensional X-ray detector.

[0010] The rapid-moving apparatus uses a flat plate-shaped 2D image recording medium.
By using a two-dimensional X-ray detector, an X-ray image can be quickly photographed on the flat two-dimensional X-ray detector. Here, a flat two-dimensional X
The X-ray detector converts an X-ray image of a large field size into an I.D. I. It can be obtained at a lower price compared to. Also, its size in the depth direction is
I. of the same field size I. Is significantly reduced in comparison with that of the above, so that mounting on a see-through table becomes extremely easy. In addition, the immediacy of X-ray image observation is not lost unlike the case where an X-ray film is used as the X-ray image recording medium.
I. The image can be observed immediately as in the case of using.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing a main part of an embodiment of an X-ray fluoroscopy table according to the present invention, and is a diagram mainly showing an X-ray source and an image receiving system portion of an X-ray image from a foot side of a top plate.

In FIG. 1, 3 to 5, 7 and 8 are the same as those in FIG. Reference numeral 6 'denotes a rapid-moving apparatus including a divided mask 6a, a cassette tray 6b, a scattered radiation removing grid 6c, and the like. Reference numeral 101 denotes a flat plate-shaped two-dimensional X-ray that can record (erase) and read an X-ray image electrically and instantaneously.
Line detector (hereinafter referred to as 2D sensor)
It comprises a flat sensor or the like disclosed in Japanese Patent No. 62283. This 2D sensor forms an X-ray image recording medium of the above-mentioned rapid-moving device 6 '.

The snap-shot device 6 'is a snap-shot device 6 (see FIG. 2).
As in I. I. 7, and is equipped with a mechanism similar to a film holder moving mechanism for performing rapid photography on a conventional X-ray fluoroscopy table. In the present invention, the 2D sensor 101 is incorporated as an alternative to an X-ray film (film holder) as an X-ray image recording medium. : From the perspective position or the retracted position) to the R position (R position: imaging position) at a high speed of 1 second or less, and the 2D sensor 101 can quickly capture an X-ray image.

Although not shown, the X-ray fluoroscopy table according to the present invention also includes a support 1 shown in FIG. 2 and a table support frame 2 rotatably supported by the support 1. The top plate 3 is guided on the table support frame 2 so as to be vertically and horizontally movable.

An X-ray photography using such a 2D sensor 101 will be described below. The X-ray fluoroscopic image of the subject 4 is expressed as I.D. I. 7. While observing with a CRT monitor (not shown) via the X-ray television 8, a part to be photographed is determined while moving the top board 3. At this time, the 2D sensor 101 is located at the F position (perspective position or retracted position) outside the X-ray flux being irradiated (outside the irradiation field). Line is turned off, then 2D
The sensor 101 moves and stops at the R position (photographing position) at a high speed,
X-ray radiation imaging is performed. Thereby, the 2D sensor 101
An X-ray image is recorded as image data.

After the photographing is completed, the 2D sensor 101 returns to the F position again, and the image data recorded on the 2D sensor 101 is read and processed to produce an X-ray image such as a DR image and displayed on a CRT monitor. You. 2D sensor 101 is F
When in position, fluoroscopy is performed as appropriate.
The photographing by the D sensor 101 is performed.

The 1D of the entire surface of the 2D sensor 101 is controlled by the division mask 6a provided above the top of the rapid-moving device 6 '(on the top plate 3 side).
Imaging (division imaging) in which the X-ray irradiation field is limited to a size such as 2, 1/3, 1/4 or the like is also possible.

A cassette tray 6b provided above the division mask 6a is incorporated as necessary, and is provided with another photographing method, for example, a CR using an IP (imaging plate).
(Computed radiography) This is used when shooting with a cassette. Further, a scattered radiation removing grid 6c provided above the cassette tray 6b is incorporated in a mechanism that swings at the time of X-ray imaging to eliminate grid streaks. These mechanisms can be used without changing the mechanism of the X-ray film-based rapid photography apparatus 6 (see FIG. 2) in the conventional X-ray fluoroscopy table (approximately replacing the X-ray film (film holder) with the 2D sensor 101). However, in the conventional mechanism (rapid shooting apparatus 6), it was necessary to shield the entire case from light so that light fogging did not occur on the film in all parts of the apparatus. However, unlike the film, the 2D sensor 101 of the present invention 6 'does not cause fogging with visible light unlike the film, so that such a light shielding structure is not necessary. Further, even in the case of performing the above-described divisional photographing, the moving mechanism for shifting the film in both the X and Y directions and moving the film, which is performed by the conventional rapid photography device 6 using the X-ray film, is unnecessary. That is, in the flash photography device 6 'of the present invention, the 2D
It is only necessary to send the sensor 101 to the same position (only the field of view needs to be controlled). Therefore, the 2D sensor 101 only needs to move from the F-position to the R-position fixed point (the same position).

[0019]

As described above, according to the present invention, an X-ray image having a large field of view can be obtained by an I.V. I. Without increasing the size in the depth direction of the camera, so that it can be easily mounted on the see-through table,
In addition, X that can be realized at low cost and that allows immediate image observation
There is an effect that a fluoroscopic table can be provided.

A flat two-dimensional X-ray image is recorded on the X-ray image recording medium.
The use of the line detector has the following effects. Conventional I. I. In contrast to the DR system (II is a spherical or concave structure), the X-ray image recording medium has a planar structure and a large field of view, so that a large image without image distortion can be obtained. It is effective for image diagnosis of bone) and chest. Since there is little image degradation due to light fog as in the case of using an X-ray film as an X-ray image recording medium, a light-shielding structure for the entire case of the rapid-moving apparatus is not required, and a simple support frame structure is sufficient. The quick-moving device mechanism does not require detailed division positioning only by moving a fixed point from the F position to the R position.
There is no need for a Y-direction moving mechanism. The effect of scattered radiation can be neglected by selecting a sensor that also uses a division mask and performing signal acquisition, and a division mask having a function of cutting it immediately before is unnecessary.

[Brief description of the drawings]

FIG. 1 is a diagram showing a main part of an embodiment of an X-ray fluoroscopy table according to the present invention.

FIG. 2 is a side view of a conventional X-ray fluoroscope.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 support table 2 table support frame 3 top plate 4 subject 5 X-ray tube device, 6, 6 'rapid shooting device 6a division mask 6b cassette tray 6c scattered radiation removal grid 7 I. I. 8 X-ray television 101 2D sensor (flat two-dimensional X-ray detector)

Claims (1)

[Claims] The present invention is characterized in that a flat two-dimensional X-ray detector is used as an X-ray image recording medium, and the flat two-dimensional X-ray detector is provided with a rapid imaging device capable of rapidly capturing an X-ray image. X-ray fluoroscopy table.