JPH07327970A - Medical x-ray radioscopic system - Google Patents

Abstract

PURPOSE:To provide a medical X-ray radioscopic system capable of observing an X-ray radioscopic image by the minimum movement of a line of sight so as to concentrate on an examinee by an operator. CONSTITUTION:This medical X-ray radioscopic system consisting of an X-ray tube 4a, an image intensifier 6a, an image processing device 50, an equipment controller 76, an X-ray controller 82 and image display means 102, 104 is constituted so as to directly load the image display means 102, 104 on the operator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical X-ray fluoroscopy apparatus, and more particularly to a medical X-ray fluoroscopy apparatus capable of minimizing movement of the operator's line of sight.

[0002]

2. Description of the Related Art Medical X-ray fluoroscopes such as an X-ray fluoroscope and a circulatory system have become indispensable in the field of diagnosis, but recently, they are used not only for diagnosis but also for treatment. Is also being used. This treatment is performed by inserting a catheter having various instruments attached to its tip into a subject under fluoroscopy. As a result, it has the great merit that it can reduce the pain to the subject and can be treated at a low cost compared with the conventional treatment that had to be performed by a surgical operation, and thus it has rapidly spread. There is. Such a treatment method is described in IVR (In
terventional Radiology).

This IVR requires delicate and fine catheter manipulation. Therefore, it is important to incorporate functions and performances that can support accurate catheter operation into the fluoroscopic imaging table and the circulatory system. Above all, there are great demands for images such as high quality of the fluoroscopic image and a method of switching the reference image and the real-time fluoroscopic image.

FIG. 7 shows a medical X widely used in general.
The structure of a fluoroscopic apparatus is shown. The X-ray fluoroscope shown in this figure includes an X-ray tube and an image intensifier (hereinafter referred to as I.D.
I. 2), and a biplane type device capable of simultaneously seeing through from two directions is shown. The X-rays emitted from the X-ray tube 4a are subject 2 lying on the top plate 1.
Through I. I. 6a, converted into an electric signal, passed through an image processing device described later, and displayed on the display 20 as a perspective image of the subject 2. These X-ray tubes 4a
And I. I. 6a is supported by an arm 8 and the arm 8
Is mounted on a support 10 fixed to the floor 12. Similarly, the X-rays emitted from the X-ray tube 4b pass through the subject 2 and are I.D. I. 6b, is converted into an electric signal, passes through an image processing device described later, and is displayed on the display 20 as a perspective image of the subject 2. These X-ray tubes 4b
And I. I. 6b is supported by an arm 14, and this arm 14 can move on a rail 18 fixed to a ceiling 24.

FIG. 8 is a block diagram of a control device of the X-ray fluoroscope. The control device can be roughly classified into an image processing device 50, a device control device 76, and an X-ray control device 82. The image processing device 50 includes an A / D converter 52, an image processing unit 54, and a display gradation processing unit 56, and a D / A converter 58 is added to display an image on the display 20.
That is, the subject 2 is irradiated with X-rays from the X-ray tube 4a,
The transmitted X-ray is I.D. I. When incident on 6a, this transmission X
The line information is converted into an analog signal by a television camera (not shown). This analog signal is converted into a digital signal by the A / D converter 52 and sent to the image processing unit 54.
The sent digital image signal is subjected to image processing such as contrast and gamma characteristic conversion, and is sent to the display gradation processing unit 56 which performs gradation processing. After the gradation processing is completed, the digital image signal is converted into an analog signal by the D / A converter 58 and displayed on the display 20 as a perspective image. The device control device 76 includes a roller 6 that supports the arm 8.
0, belts 62 and 66, pulleys 64 and 68, speed reducer 7
0, and a motor 72, and the X-ray tube 4a and the I.D. I. The motor control unit 74 drives and controls the motor 72 so that 6a and 6a rotate around the subject 2. The X-ray control device 82 also includes a high voltage generator 78 for applying a high voltage to the X-ray tube 4a, and an X-ray control for issuing X-ray condition signals such as tube voltage, tube current, and voltage application time of the X-ray tube. It is composed of a part 80. The image processing device 50, the device control device 76, and the X-ray control device 82 described above are the system controller 84.
Is controlled in a comprehensive manner.

[0006]

By the way, as described above, since the IVR requires delicate catheter operation, the operator must concentrate his / her nerves on the display as much as possible. However, operations such as device control and X-ray control are necessary even during treatment, and since the condition of the subject must always be taken into consideration, it is not possible to concentrate on the display only. Very difficult. That is, the operator has to gaze at the operation switches of the device, the subject, and the display alternately. As described above, it is very troublesome to frequently move the line of sight from the display to other objects, and there is a problem that accurate treatment is hindered.

The present invention has been made in order to solve such a problem, and an operator can observe an X-ray fluoroscopic image with a minimum movement of the line of sight, and therefore, the medical X-ray can be focused on the treatment. An object is to provide a fluoroscopic device.

[0008]

In order to achieve this object, in the present invention, in a medical X-ray fluoroscopic apparatus for displaying an X-ray fluoroscopic image of a subject, the display means for the image is directly displayed to the operator. A correction lens that changes the optical distance of the displayed image is provided between the optical path between the display device and the operator's eye, and the display device is provided with this correction lens from the operator's visual field. A retreating means for retreating or a half mirror is provided between the display device and the operator's eye optical path.

[0009]

In this medical X-ray fluoroscopic apparatus, since the X-ray fluoroscopic image display means is directly attached to the operator, the operator has no need to move the line of sight when observing the fluoroscopic image. There is no. Further, by providing a correction lens for changing the optical distance of the displayed image between the optical path between the display device and the operator's eye, the perspective image can be moved to a position where the operator can easily see. Furthermore, by providing a retracting means for retracting the display device from the operator's visual field, the fluoroscopic image can be observed only when necessary. Further, by providing a half mirror between the optical path between the display device and the operator's eye, the fluoroscopic image can be observed only when necessary, or the fluoroscopic image can be superposed on the subject. become.

[0010]

1 is a block diagram of a control device in an embodiment of a medical X-ray fluoroscopic apparatus according to the present invention.

First, the transmission X of the subject 2 from the X-ray tube 4a
The lines are I. I. It is incident on 6a and is converted into an analog image signal by a television camera (not shown). This analog image signal is converted into a digital signal by the A / D converter 52,
It is sent to the image processing unit 54. The image processing unit 54 performs image processing such as contrast and gamma characteristic conversion on the sent digital image signal, and sends it to the display gradation processing unit 56 which performs gradation processing. The digital image signal that has undergone gradation processing is sent to the liquid crystal display control unit 100, and is displayed on the left side liquid crystal display 102 corresponding to the operator's left eye and the right side liquid crystal display 104 corresponding to the right eye of the operator 2, respectively. Display a perspective image. Further, the X-ray is a high voltage generator 78 that applies a high voltage to the X-ray tube 4a, and an X-ray control that emits X-ray condition signals such as a tube voltage, a tube current, and a voltage application time to the high voltage generator 78. It is controlled by the unit 80. In addition, the X-ray tube 4
a and I. I. 6a is supported by the arm 8 supported by the roller 60, and the belts 62, 66, the pulley 64,
It is connected to a motor 72 via 68 and a speed reducer 70. The motor 72 is driven by a motor controller 74. The image processing apparatus 50, the motor controller 76, and the X-ray controller 82 are generally controlled by the system controller 84.

Since the present invention is directed to the image display means, and the difference between the control devices of FIGS. 1 and 8 is the image display means, the image display means will be described in detail below. explain.

FIG. 2 is a plan view of an operator wearing the image display means. The left side liquid crystal display 102 corresponding to the left eye 106 and the right side liquid crystal display 104 corresponding to the right eye 108 are integrally housed in a case 114 and a belt 116.
Is applied to the operator's head 202. Where 11
Reference numerals 0 and 112 denote correction lenses, which are liquid crystal displays 1
Since 02 and 104 are near the subject, the image is moved to a position where it is easy to see optically. FIG. 3 is an explanatory diagram showing the function of this correction lens. That is, the correction lens 110 located at a distance f in front of the left eye 106 is
The virtual image 122 of the actual display image 102 on the liquid crystal display is moved to a distance D that is easy for the operator to see. Although the left eye is described in this figure, the same applies to the right eye. In FIG. 4, the operator 200 has liquid crystal displays 102 and 10 which are image display means incorporated in the case 114.
4 is a schematic view in which correction lenses 110 and 112 are mounted. The image display means can also be formed so that it can be retracted arbitrarily so that the operator can use it only when he / she wants to see the fluoroscopic image. FIG. 5 is a perspective view (a) and a sectional view (b) showing the image display means having a retracting function. The liquid crystal displays 102 and 104 fixed to the shutter member 130, the correction lenses 110 and 112, and the members 134 and 136 that support the correction lenses are supported by a hinge 138 so as to be rotatable in the direction of the case 114. ing. As a result, it becomes possible to manually perform the retreat movement (direction of the arrow A) by operating the lever 132. It should be noted that this retreating operation may be performed automatically by using an actuator provided with a switch that is operated by voice, instead of being manually performed.

On the other hand, as shown in FIG. 6, even if a half mirror is provided in the optical path between the image display means and the operator, the same effect can be obtained. That is, the liquid crystal displays 102, 10
The display image of No. 4 is the correction lenses 110 and 112 and the mirror 1.
50, 152, half mirrors 154, 156,
The operator's left eye 106 and right eye 108 are in the visual field. Through the half mirrors 154 and 156, the operator can directly see only the body of the subject when no image is displayed on the image display means. Further, by adjusting the brightness of the display image, it is possible to superimpose and observe the perspective image and the substance.

In the above description, the configuration shown in FIG. 6 using the half mirror is the most practical, but the configuration shown in FIG. 2 without the half mirror, and the liquid crystal displays 102 and 104. The operator's left eye 106 and right eye 108 may be made longer and the correction lens may not be provided. That is, the first point of the present invention is that the image display means can be attached to the operator, and
To eliminate the movement of the line of sight between the subject and the display. In this embodiment, the liquid crystal display is used as the image display means, but it is not limited to this.
If the size and weight that can be worn by the surgeon are satisfied, CR
There is no problem with a T or EL display. Further, in this embodiment, as a means for converting a transmission X-ray image of a subject into an image electric signal, I.V. I. And I used a TV camera,
It is not limited to this.

[0016]

As described above, in the medical X-ray fluoroscopic apparatus according to the present invention, the operator does not need to move his or her line of sight between the subject and the fluoroscopic image display, so that the operator can concentrate on the treatment. In addition, the physical and mental burden on the operator is reduced, and quick and accurate treatment can be performed.

[Brief description of drawings]

FIG. 1 is a block diagram of a control device in an embodiment of a medical X-ray fluoroscope according to the present invention.

FIG. 2 is a plan view of an operator who wears an image display unit according to the present embodiment.

FIG. 3 is an explanatory diagram showing a function of a correction lens that changes an optical distance of a displayed image.

FIG. 4 is a schematic diagram in which an operator wears image display means.

FIG. 5 is a schematic diagram showing an image display unit having a save function.

FIG. 6 is a plan view of an apparatus in which a half mirror is provided between an optical path between an operator and an image display unit.

FIG. 7 is a schematic configuration diagram of a conventional medical X-ray fluoroscopic apparatus.

FIG. 8 is a block diagram of a control device of a conventional medical fluoroscope.

[Explanation of symbols]

 1 Top plate 2 Subjects 4a, 4b X-ray tube 6a, 6b I. I. 8, 14 Arms 10 Supporter 12 Floor 18 Rail 20 Display 24 Ceiling 50 Image processing device 52 A / D converter 54 Image processing unit 56 Display gradation processing unit 58 D / A converter 60 Roller 62, 66 Belt 64, 68 Pulley 70 Reducer 72 Motor 74 Motor control unit 76 Equipment control device 78 High voltage generation unit 80 X-ray control unit 82 X-ray control device 84 System controller 100 Liquid crystal display control unit 102, 104 Liquid crystal display 106, 108 Operator's eye 110 , 112 correction lens 114 case 116 belt 120 display image 122 virtual image 130 shutter member 132 operating levers 134, 136 support members 150, 152 mirrors 154, 156 half mirror 200 operator 202 operator's head

Claims (4)

[Claims] 1. An X-ray tube, an X-ray detector, means for converting a transmitted X-ray image of a subject in the X-ray detector into an image electric signal, and arithmetic processing for the image electric signal. A medical X-ray fluoroscopic apparatus having an image processing device for displaying the calculated image signal and a display unit for displaying the calculated image signal as an image, wherein the display unit is configured to be attached to an operator.
Fluoroscope. 2. A medical X-ray fluoroscopic apparatus according to claim 1, wherein a correction lens for changing the optical distance of the displayed image is provided between the display means and the optical path between the operator's eyes. . 3. The medical X-ray fluoroscopic apparatus according to claim 1, wherein the display means is provided with a retracting means for retracting the display means from the field of view of the operator. 4. A half mirror is provided in the optical path between the display means and the operator's eye.
The medical X-ray fluoroscopic apparatus according to item 1.