JP2006340945A - X-ray perspective photographing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an X-ray perspective photographing device which uses a flat panel detector or a detector for outputting an electric signal such as an image intensifier combined with a television camera as an X-ray receiving photographer to reduce the effect of noise generated by an X-ray tube device on an X-ray image. <P>SOLUTION: The device comprises an insulating plate 4 such as a fluorocarbon resin 4 having a thickness of 1 mm and an insulating ring 5 made of a phenolic resin, wherein the insulating plate is fixed by a screw on the inner peripheral surface of two circles constructed by the fixing rings 2A and 2B of an X-ray tube fixing device 2; and the insulating ring 5 is positioned to touch with the outer side surface of two supporting rings 3B in the X-ray tube device 1 and to support the X-ray tube device 1 with the fixing ring 2B, allowing insulation between the X-ray tube device 1 and the X-ray tube fixing device 2 to reduce the effect of noise generated by the X-ray tube device on the X-ray image. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a diagnostic or nondestructive X-ray fluoroscopic imaging apparatus that uses a flat panel detector or a detector that outputs an electrical signal such as a combination of an image intensifier and a television camera as an X-ray light receiving and imaging unit.

  When a flat panel detector or a detector that outputs an electrical signal such as a combination of an image intensifier and a TV camera is used as a light receiving imaging unit in an X-ray fluoroscopic apparatus, electrical noise to the X-ray receiving imaging unit Since contamination of the image causes image deterioration, it must be prevented as much as possible. For this reason, various measures for preventing noise have been made in the past (see, for example, Patent Document 1).

  One type of noise that causes image degradation is noise generated by the X-ray tube apparatus. FIG. 4 shows an example of the X-ray tube device, FIG. 4 (a) is a front view, and FIG. 4 (b) is a plan view. The X-ray tube device 1 applies a high voltage from the outside to two high voltage connection portions 3A that are electrically connected to the anode or cathode of an X-ray tube (not shown) built in the X-ray tube envelope 3 respectively. By applying, X-rays are emitted from the X-ray radiation hole 3C. In addition, two holding ring portions 3B provided over the entire circumference of the X-ray tube envelope 3 at a substantially contrast position with the X-ray radiation hole 3C as the center are connected to the X-ray tube apparatus 1 by the method described later. Used to attach to a holding device (not shown).

  The X-ray tube device 1 is usually attached to the X-ray holding device so as to face the X-ray light receiving unit. For this purpose, an X-ray tube attachment device 2 as shown in FIG. 5 is used. 5A is a front view of the X-ray tube mounting device 2, FIG. 5B is a side view, and FIG. 5C is a plan view. The upper portion of the support shaft 2D is a portion that is inserted into the X-ray tube fixing portion of the X-ray holding device in order to attach the X-ray tube mounting device 2 to the X-ray holding device, and the mounting plate 2C is fixed to the lower portion with screws. . A semicircular attachment ring 2A is fixed to both ends of the attachment plate 2C by screws, and a semicircular attachment ring 2B is screwed to each attachment ring 2A to hold the X-ray tube apparatus 1. It consists of two circular parts for. Each part of the X-ray tube mounting device 2 is usually made of aluminum.

FIG. 6 shows a cross-sectional view of the X-ray tube mounting device 2 holding the X-ray tube device 1. In the X-ray tube mounting device 2, the inner peripheral surfaces of the two circular portions formed by the L-shaped mounting ring 2 </ b> A and the mounting ring 2 </ b> B are respectively the two holding ring portions 3 </ b> B of the X-ray tube device 1. The attachment ring 2B is fixed to the attachment ring 2A by screwing so that the X-ray tube device 1 is held in contact with the outer peripheral surface. In FIG. 6, parts denoted by the same reference numerals as those in FIG. 5 are the same as those in FIG.
JP 2004-24683 A

  One of the noises that cause image degradation is noise generated by the X-ray tube apparatus. Among them, the influence of noise generated particularly in connection with the driving of the stator coil for rotating the anode of the X-ray tube is affected. large. The noise generated by the X-ray tube device is more noticeable because the envelope of the X-ray tube device is electrically short-circuited with the X-ray light receiving unit housing via the X-ray holding device. It often appears as.

  On the other hand, in order to prevent an electric shock, the envelope of the X-ray tube device is connected to a ground terminal such as a distribution board by a ground wire. Similarly, the X-ray holding device and the X-ray light receiving unit housing are separated for safety. It is connected to a ground terminal such as an electrical panel. Therefore, it is not particularly intended that the envelope of the X-ray tube device is short-circuited to the X-ray light receiving unit housing via the X-ray holding device. It is only the cause of the increase. An object of the present invention is to prevent an increase in image noise due to an envelope of an X-ray tube apparatus being attached to an X-ray holding apparatus in an electrically shorted state.

  In order to achieve the above object, the X-ray tube apparatus and the X-ray tube apparatus are attached and held by the X-ray tube mounting apparatus, and the X-ray is irradiated from the X-ray tube apparatus. In an X-ray fluoroscopic apparatus comprising an X-ray light receiving imaging device that receives a line and converts it into an electrical signal and a high voltage generator that supplies a high voltage to the X-ray tube device, the X-ray tube device is electrically An X-ray fluoroscopic apparatus is provided that is insulated and attached to the X-ray holding apparatus.

  In order to achieve the above object, the invention of claim 2 is configured such that electrical insulation between the X-ray tube device and the X-ray holding device is performed by inserting an insulator between the X-ray tube device and the X-ray tube mounting device. An X-ray fluoroscopic apparatus according to claim 1 is provided.

  According to a third aspect of the present invention, in order to achieve the above object, the X-ray tube device and the X-ray holding device are electrically insulated by constituting part or all of the X-ray tube mounting device with an insulator. An X-ray fluoroscopic apparatus according to item 1 is provided.

  According to a fourth aspect of the present invention, in order to achieve the above object, the X-ray tube device and the X-ray holding device are electrically insulated by constituting a part of the X-ray holding device with an insulator. The described X-ray fluoroscopic apparatus is provided.

  By attaching the envelope of the X-ray tube apparatus to the X-ray holding apparatus in an electrically insulated state, the influence of noise generated by the X-ray tube apparatus on the image is greatly reduced, and the X-ray image is low in noise. Can be obtained.

  Examples of the inventions of claims 2, 3 and 4 are shown in Example 1, Example 2 and Example 3, respectively.

  Example 1 will be described with reference to FIG. 1 are the same as those shown in FIG. 5 and are not described here.

  As described with reference to FIG. 6 in the background art section, in the X-ray tube mounting device 2, the inner peripheral surfaces of the two circular portions formed by the mounting ring 2A and the mounting ring 2B having an L-shaped cross section are respectively The attachment ring 2B is fixed to the attachment ring 2A by screwing so that the X-ray tube device 1 is held in contact with the outer peripheral surfaces of the two holding ring portions 3B of the X-ray tube device 1. Therefore, the X-ray tube device 1 is electrically short-circuited with the X-ray tube mounting device 2 at this portion, and further short-circuited with the X-ray holding device and the X-ray light receiving unit housing.

  In this embodiment, an insulating plate 4 such as a fluororesin plate having a thickness of 1 mm, for example, is screwed over the entire circumference on the inner peripheral surfaces of the two circular portions formed by the mounting ring 2A and the mounting ring 2B of the X-ray tube mounting device 2. 6, and further, an insulating ring 5 made of, for example, a phenol resin is disposed so as to be in contact with the outer surfaces of the two holding ring portions 3B of the X-ray tube device 1, and the X-ray tube device 1 is attached by the mounting ring 2B. Since the X-ray tube device 1 and the X-ray tube attachment device 2 are insulated from each other, the X-ray tube device 1 can be attached to the X-ray holding device in an insulated state.

  A second embodiment will be described with reference to FIG. 2 that are denoted by the same reference numerals as those in FIG. 6 are the same as those in FIG.

  As for the X-ray tube mounting apparatus 7 in FIG. 2, the supporting shaft 7D, the mounting ring 7A and the mounting ring 7B which are parts thereof are respectively the support shaft 2D, the mounting ring 2A and the mounting ring 2B of the X-ray tube mounting apparatus 2 in FIG. The same. In FIG. 5, instead of the mounting plate 2C fixed to the support shaft 2D with screws, the metal reinforcing plate 7F is insulatively mounted with an insulating material such as phenol resin between the metal reinforcing plate 7E. It is fixed to the support shaft 7D by screws with the plate 7C interposed therebetween. However, for the purpose of insulation, the reinforcing plate 7E and the reinforcing plate 7F are not long in contact with the mounting ring 7A, and the strength of each screw hole for mounting the mounting ring 7A on both ends of the insulating mounting plate 7C. In order to reinforce, the helicate 8 is inserted and fixed. By configuring the X-ray tube attachment device 7 in this way, the support shaft 7D and the attachment ring 7A are insulated from each other, so that the X-ray tube device 1 can be attached to the X-ray holding device while being insulated.

  In the above embodiment, the mounting plate 2C of the X-ray tube mounting apparatus 2 shown in FIG. 5 is configured using an insulator, but instead, both the mounting ring 2A and the mounting ring 2B or the support shaft 2D is configured using an insulator. May be configured.

  A third embodiment will be described with reference to FIG. FIG. 3 shows an example in which the X-ray tube apparatus 1 and the X-ray holding apparatus 10 are insulated from each other and the X-ray tube apparatus 1 is attached to the X-ray holding apparatus 10, and FIG. 3 (a) is a front view. FIG. 3B is a plan view. Specifically, a portion for fixing the metal X-ray tube fixing portion 10B, into which the support shaft 2D (see FIG. 5) of the X-ray tube mounting device 2 is inserted and fixed, to the metal holding device main body 10A with screws 10C. An insulating plate 10E made of an insulating material such as phenol resin is inserted between the X-ray tube fixing portion 10B and the holding device body 10A, and further, for example, phenol resin or the like is inserted between the X-ray tube fixing portion 10B and the screw 10C. By inserting the insulating cylinder 10D made of an insulator, the X-ray tube attachment device 2 and the X-ray holding device 10 are insulated from each other, so that the X-ray tube device 1 is attached to the X-ray holding device in an insulated state. be able to.

  In the above embodiment, the X-ray tube fixing portion 10B is fixed to the holding device main body 10A using the insulating cylinder 10D and the insulating plate 10E. However, the X-ray tube fixing portion 10B is made of an insulating material and directly attached to the holding device main body 10A. It may be fixed.

  The present invention relates to a diagnostic or non-destructive X-ray fluoroscopic imaging apparatus that uses a flat panel detector or a detector that outputs an electrical signal such as a combination of an image intensifier and a television camera as a light receiving imaging unit.

It is a figure for demonstrating the Example of this invention. It is a figure for demonstrating the Example of this invention. It is a figure for demonstrating the Example of this invention. It is a figure for demonstrating the external appearance of an X-ray tube apparatus. It is a figure for demonstrating an X-ray tube attachment apparatus. It is a figure which shows the state which attached the X-ray tube apparatus to the X-ray tube attachment apparatus.

Explanation of symbols

1: X-ray tube device 2: X-ray tube mounting device 2A: Mounting ring 2B: Mounting ring 2C: Mounting plate 2D: Support shaft 3: X-ray tube envelope 3A: High voltage connecting portion 3B: Holding ring portion 3C : X-ray radiation hole 4: Insulating plate 5: Insulating ring 6: Screw 7: X-ray tube mounting device 7A: Mounting ring 7B: Mounting ring 7C: Insulating mounting plate 7D: Support shaft 7E: Reinforcing plate 7F: Reinforcing plate 8: Helisert 9: Screw 10: X-ray holding device 10A: Holding device body 10B: X-ray tube fixing part 10C: Screw 10D: Insulating cylinder 10E: Insulating plate

Claims (4)

An X-ray tube device, an X-ray holding device for mounting and holding the X-ray tube device by an X-ray tube mounting device, and an X-ray light receiving imaging device for receiving X-rays emitted from the X-ray tube device and converting them into electrical signals And a high voltage generator for supplying a high voltage to the X-ray tube device, wherein the X-ray tube device is electrically insulated and attached to the X-ray holding device. X-ray fluoroscopic apparatus. 2. The X-ray fluoroscopic imaging according to claim 1, wherein electrical insulation between the X-ray tube device and the X-ray holding device is performed by inserting an insulator between the X-ray tube device and the X-ray tube mounting device. apparatus. 2. An X-ray fluoroscopic apparatus according to claim 1, wherein the X-ray tube apparatus and the X-ray holding apparatus are electrically insulated by constituting a part or all of the X-ray tube mounting apparatus with an insulator. 2. The X-ray fluoroscopic apparatus according to claim 1, wherein electrical insulation between the X-ray tube apparatus and the X-ray holding apparatus is performed by forming a part of the X-ray holding apparatus with an insulator.

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