JP2002112997A - X-ray photographing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an X-ray photographing apparatus capable of preventing a contact by using a detecting means having two functions of a contactor and a non-contactor. SOLUTION: A contact preventing unit 5 has a non-contact sensor (side face) 12, a non-contact sensor (front surface) 13, a cord switch 8a and a tape switch 8b. Thus, an operation of a C-arm type X-ray photographing device is stopped before an element to be detected is contacted with the unit 5. Even in the case of an 'X-ray input unit' in which a sensor cannot be disposed, the element to be detected is contacted with a grid 16, and a compression spring 11 is deformed. Thus, a pushing plate 10 pushes the switch 8a to detect the contact, and the operation of the C-arm type X-ray photographing device is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray imaging apparatus, and more particularly to an X-ray imaging apparatus for improving a contact prevention device provided at a portion that may come into contact with a subject, an operator, and peripheral devices.

[0002]

2. Description of the Related Art Among X-ray examinations using an X-ray imaging apparatus,
In particular, a C-arm type X-ray imaging apparatus having a high possibility of contact between the X-ray imaging apparatus and a subject, an operator, or an operator is high. A circulatory system examination performed by combining a C-arm type X-ray imaging apparatus and a catetable is to capture an image of a blood vessel circulating in the body three-dimensionally. The C-arm type X-ray imaging apparatus is operated in the axial direction and around the subject's body axis, and X-ray detectors (here, image intensifiers (I.
I. )) And set the X-ray tube at a desired position to perform imaging.
Therefore, it is necessary to operate the apparatus with a high degree of freedom around the subject, and the possibility of contact between the X-ray imaging apparatus, the subject, the operator, and the operator increases. In X-ray imaging by a C-arm X-ray imaging apparatus, X-rays emitted from an X-ray source of an X-ray tube arranged at one end of a C-arm pass through a subject and are arranged at the other end of the C-arm. I. I. The output optical image is converted into an electronic image by a television camera or a CCD (Charge Coupled Device) camera and projected on a monitor via an image processing device. The captured image needs to be clear in order to check the captured image projected on the monitor and find the affected part. Therefore, the X-ray tube, the subject, and the I.D. I. Is used to prevent blurring due to enlargement of the photographed image. I. Must be in close contact with the subject. In addition, since a sterile cloth is applied to the subject on the cate table as a sheet, the portion of the C-arm on the X-ray tube side which is disposed under the cate table and the movement of the X-ray tube are visually checked. I can't.

Therefore, the conventional C-arm type X-ray apparatus manages position information from each operation axis via a position detector such as a potentiometer or an encoder using an interference prevention program, and the C-arm, I.D. I. When the distance between the X-ray tube and the catetable or other X-ray equipment is within a certain area, the operation speed is reduced, the danger of contact is notified to the operator and the operator, and the operation is stopped before the contact to stop the contact. Had been prevented. Also, the subject, the operator, the operator, and the equipment and the like used at the time of the examination for which the area cannot be confirmed by the interference prevention program are the contact detection device, the operation of the device driven by the motor is stopped, and the C arm This prevents danger (compression, pinching, etc.) due to the continued operation of the X-ray imaging apparatus.

[0004] Although such a contact detection device prevents personal injury such as compression or pinching, it is in contact with a subject, an operator, and an operator due to contact detection.
A C-arm type X-ray imaging apparatus equipped with a contact prevention device using a non-contact sensor that detects a change in capacitance due to the approach of the detected object to the sensor without coming into contact with the detected object has appeared.

[0005]

SUMMARY OF THE INVENTION A contact prevention device is provided for stopping the operation of a C-arm type X-ray imaging device used in various forms by an X-ray inspection technique before coming into contact with an object to be detected. This is a device for ensuring the safety of the subject, the operator, and the operator.

However, since the sensor is reflected in the photographed image in the X-ray irradiation area, an undetectable area where a non-contact sensor cannot be arranged is generated. Also, in the event that the non-contact sensor breaks down, there is a concern that the safety mechanism of the C-arm X-ray apparatus will not work.

In view of the above, the present invention provides an X-ray imaging apparatus which addresses such a problem and which can prevent contact using detection means having two functions of a non-contact detector and a contact detector. The purpose is to:

[0008]

In order to achieve the above object, the present invention provides a base ring on the periphery of an image intensifier, and a position corresponding to a position of an X-ray imaging area of the base ring and the image in. A switch is provided at a position corresponding to the periphery of the tensifier, and a case incorporating a non-contact switch is provided at a position corresponding to the base ring. When the case comes into contact with the subject, the switch is operated by the case. It is configured to do so. The contact prevention device configured as described above can detect that the detected object approaches before contacting the detected object, and can detect the contact of the detected object by the contact detection plate, and can perform the non-contact sensor. In the case where a failure occurs, the safe operation of the C-arm type X-ray imaging device as the contact detection device can be maintained.

[0009]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a block diagram of a C-arm X-ray apparatus according to the present invention, and FIG. I. 1 shows a cross-sectional view of a front contact prevention device.

The C-arm 1 includes a C-arm slide operation drive unit (A) and a C-arm rotation operation drive unit (B) (not shown).
Thus, it is operably supported in the directions of arrows in FIGS. 1 (A) and 1 (B). As shown in FIG. I. The front-rear drive unit 2 is attached, and I. I. The support fitting 3 allows the I.I. I. 4 and I.4. I. 4 operates in the direction of the arrow in FIG. An X-ray tube (not shown) is provided at the other end of the C-arm 1. I. 4 and supported. For X-ray photography, the C-arm 1 is shown in FIG.
(B) Direction and I. I. 4 is operated in the direction shown in FIG. 1 (C) to perform positioning. I. 4 is positioned so as to be as close as possible to the subject 17. for that reason,
I. I. 4 is provided with a contact prevention device 5 on the front surface thereof. I. 4 is prevented. The contact prevention device 5 has a cylindrical I.D. I. 4 are provided around the front and side surfaces.

FIG. I. FIG. 4 is a cross-sectional view of the contact prevention device 5 attached to the fourth embodiment. I. I. 4 is an X-ray input unit, which is an X-ray imaging area 20, and
The periphery is outside the X-ray imaging area 30. But,
Since unnecessary X-rays are illuminated outside the X-ray imaging region 30, a lead plate 6 formed in a donut shape is attached to remove the unnecessary X-rays. Next, a circular base ring 7 formed into an L-shaped cross section so as to surround the lead plate 6 is provided with an I.V. I. 4 is provided. A protrusion 7 'is formed at a position corresponding to the end of the lead plate 6 of the base ring 7, and a cord switch 8a is formed on the protrusion 7'.
Is provided. In addition, I. I. A tape switch 8b is provided on the base ring 7 at a position corresponding to the side surface of the base ring 4. Then, a non-contact sensor case (back) 9 having a substantially L-shaped cross section is arranged at a position corresponding to the base ring 7. One end of this case 9 is I.D. I. The compression spring 11 is fixed to the cushion 15 attached to the base ring 7 and the other end is provided to the base ring 7.
Further, a push plate 10 for operating the code switch 8a is provided at the other end of the case 9 so that a normal state,
That is, I. I. In a state where 4 does not contact the subject 17, the case 9 is pressed by the cushion 15 and the compression spring 11 so that the push plate 10 and the code switch 8a and the case 9 and the tape switch 8b do not contact. I. I. A grid 16 for removing scattered X-rays is provided at a position corresponding to the X-ray imaging area 20 and a part of the outside 30 of the X-ray imaging area. The grid 16 is attached to the end of the non-contact sensor case (rear) 9 at its end, so that I.D. I. 4 in front. Next, a non-contact sensor case (front) 14 having an L-shaped cross section is provided so as to cover the non-contact sensor case (back) 9. In this case, the end of the grid 16 is
The case 14 is attached so as to be sandwiched between the end of the case 14 and the end of the case 14. A plurality of non-contact sensors (side surfaces) 12 and a plurality of non-contact sensors (front) 13 are built in a hollow case composed of the case 9 and the case 14. The case 9 and the case 14 are arranged at the outer edge of the X-ray irradiation area.

In the above configuration, I.I. I. When the subject 4 approaches the subject 17, the non-contact sensors 12 and / or 13 sense this, and the I.O. I. 4 is stopped. Even in this case, depending on the body shape of the subject, I.P.
I. 4 may contact the subject, and in this case, the non-contact sensor (front) 14 is pressed. Then, the non-contact sensor (back) 9 is also pushed, and the cushion 15 and the compression spring 11 are pushed, so that the push plate 10 is moved by the cord switch 8a.
Is activated, and the case 9 activates the tape switch 8b, so that the I.D. I. Stop the movement of 4. When the shooting is completed, I. I. When 4 returns to the original position, the cord switch 8a and the tape switch 8b are turned off by the action of the compression spring 11 and the cushion 15, and return to the original state.

The contact prevention device 5 as described above includes a non-contact sensor (side surface) 12, a non-contact sensor (front) 13,
In order to incorporate the code switch 8a and the tape switch 8b, I.D. I. 4, a contact prevention device 5
It is possible to stop the operation of the C-arm type X-ray imaging apparatus before the detection object comes into contact with the object, and the sensor is reflected in the captured image.
In the “X-ray input unit” where the front (front) 13 cannot be arranged, the non-contact sensor case (back) 9 integrated with the grid 16 by the object to be detected touching the grid 16, ) 14 is pressed and the compression spring 1
When 1 is deformed and the push plate 10 presses the code switch 8a, it is possible to detect the contact and stop the operation of the C-arm type X-ray imaging apparatus. Also, in the event that the non-contact sensor (side surface) 12 and the non-contact sensor (front) 13 are out of order, if the detected object comes into contact with the grid 16 or the non-contact sensor case (table) 14, a C-arm type X-ray imaging apparatus Can be stopped.

In the above-described embodiment, the image-
Although an example using an intense fire (II) has been described, the present invention is not limited to this, and can be applied to, for example, an apparatus using a flat Hamnell type detector. Similarly, obstruction occurs during operation, not only around the X-ray tube, around the exterior of the C-arm type X-ray imaging device such as the end of the C-arm, but also at the movable parts of other X-ray imaging devices such as an X-ray fluoroscopy table. By providing a contact prevention device having the same structure at a position where contact with an object is assumed, the safety of the X-ray imaging apparatus can be improved.

[0015]

The present invention has been configured as described above.
It has both a contact prevention function and a contact detection function, so it is effective even in an X-ray irradiation area where sensors cannot be arranged, and even if the non-contact sensor breaks down, the subject, the surgeon, and the operator Safety can be ensured.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a C-arm type X-ray imaging apparatus according to an embodiment of the present invention.

FIG. 2 is a partially enlarged sectional view of an embodiment according to the present invention.

[Explanation of symbols]

 1 C arm 2 I. I. Front / rear drive unit 3 I. I. Support bracket 4 I. I. Reference Signs List 5 contact prevention device 6 lead plate 7 base ring 8a code switch 8b tape switch 9 non-contact sensor case (back) 10 push plate 11 compression spring 12 non-contact sensor (side) 13 non-contact sensor (front) 14 non-contact sensor case ( Table) 15 Cushion 16 Grid 17 Subject 20 Imaging area 30 Non-imaging area

Claims (1)

[Claims] 1. A base ring provided on a peripheral edge of a movable portion of an X-ray imaging apparatus, and a contact provided at a position corresponding to a position outside the X-ray imaging region of the base ring and at a position corresponding to a periphery of the movable portion. A sensor and a case having a built-in non-contact sensor provided at a position corresponding to the base ring, wherein the contact sensor is operated by the case when the case comes into contact with a subject. An X-ray imaging apparatus characterized in that: