JP2009042350A - Radiographic imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a cassette type radiographic imaging apparatus which stores a radiation detection panel in a cassette consisting of exterior members joined to each other in dividable manner and which has the cassette with a small wall thickness at the joint of the exterior members. <P>SOLUTION: This radiographic imaging apparatus stores the radiation detection panel for detecting radiation having transmitted through an object in the cassette. The cassette consists of the plurality of exterior members. The plurality of exterior members have joint surfaces mutually joined to each other with an electrically releasable adhesive. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a radiographic imaging apparatus that obtains a radiographic image from digital information obtained by detecting radiation transmitted through a subject.

  Radiation images typified by X-ray images have been widely used for disease diagnosis, nondestructive inspection, and the like.

  Recently, a radiation imaging system that detects radiation transmitted through a subject with a radiation detection panel and obtains a radiation image from digital information obtained as a detection signal is also widely used.

  The cassette-type radiographic imaging device is a portable device in which the radiation detection panel, a circuit board related to the radiation detection panel, and the like are accommodated in one thin box-shaped container (cassette).

  Such a cassette type radiographic imaging apparatus is located at a location corresponding to the situation of the patient to be imaged and at a desired position in addition to the normal imaging performed by loading it in a stationary imaging apparatus in the imaging room. It is also possible to perform imaging by arranging a cassette type radiographic imaging device.

  In such imaging, a cassette type radiographic imaging device may be laid under the patient, or in some cases, the patient may stand on it. Furthermore, there is also an unexpected situation where it falls to the floor during handling.

  Accordingly, the cassette of the cassette type radiographic image capturing apparatus needs to be constituted by an exterior member having sufficient strength.

  In addition, the cassette must be able to be opened in parts as necessary in order to cope with regular exchange of internal contents or inspection and repair at the time of failure.

  In order to respond to such a request, a joint portion by a screw that joins a plurality of exterior members constituting the cassette so as to be disassembled is provided.

  In order to satisfy the requirements as described above, it is necessary to provide the exterior member with sufficient thickness while maintaining the determined external dimensions of the cassette.

  As a result, the space provided between the exterior member and the radiation detection panel housed inside and other electronic components is narrowed, making it difficult to absorb external impacts. Moreover, the fall of portability may be caused from the increase in mass.

  Since the exterior member disposed on the front surface of the radiation detection panel constituting one surface of the cassette must not attenuate the radiation that passes through the subject and reaches the radiation detection panel, carbon fiber resin is used. Often.

  In order to fix such a resin component with a screw, it is necessary to give a sufficient thickness to a portion that receives the screw in order to prevent the resin component from being damaged.

  For the improvement of impact resistance, a proposal to improve impact resistance by providing a buffering agent at the inner end of the cassette (for example, refer to Patent Document 1), or filling the inside of the cassette with a filler. A proposal (for example, refer to Patent Document 2) has been made.

However, even in the cassette type radiographic imaging apparatus based on such a proposal, it is desirable when the space provided between the exterior member, the radiation detection panel accommodated in the exterior member, and the electronic components related thereto is not sufficient. Impact resistance cannot be obtained, or in some cases, measures taken to improve impact resistance prevent the size and weight required for cassettes from being reduced, or assembly during production and maintenance in the market It may reduce the sex.
JP 2001-346788 A JP 2004-184679 A

  The present invention has been made in view of the situation as described above, and an object of the present invention is a cassette type radiographic imaging apparatus in which a radiation detection panel is accommodated in a cassette made of an exterior member joined in a separable manner. An object of the present invention is to realize a cassette type radiographic imaging apparatus having a cassette having a small thickness at the joint portion of the member.

The above-mentioned subject is achieved by realizing the following invention.
1. A radiographic imaging apparatus that houses a radiation detection panel for detecting radiation transmitted through a subject in a cassette,
The cassette is composed of a plurality of exterior members,
The radiographic imaging apparatus according to claim 1, wherein the plurality of exterior members have joint surfaces that are joined to each other with an electrically peelable adhesive.
2. 2. The radiographic imaging apparatus according to claim 1, wherein an exterior member in which a non-conductive member and a conductive member are joined is included in the plurality of exterior members.
3. The exterior member which has the joint surface joined by an adhesive agent and the joint surface joined by an electro-releasable adhesive agent in the said exterior member is contained in 1 or 2 characterized by the above-mentioned. Radiographic imaging device.
4). Electrically connected to the joint surface of the facing exterior member via an electro-releasable adhesive,
4. The radiographic imaging apparatus according to any one of claims 1 to 3, further comprising a power receiving unit that receives power applied from outside.
5). The radiographic imaging apparatus according to any one of claims 1 to 4, further comprising a blocking member that electrically blocks the power receiving means from the outside.

  According to the present invention, a cassette is realized in which exterior members are joined to each other without using screws.

  Therefore, an increase in the thickness of the joint portion of the exterior member is prevented, and a sufficient space is ensured between the radiation detection panel housed inside and the electronic component related thereto.

  As a result, the maintainability and reliability of the cassette type radiation imaging apparatus is improved.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an external view of a cassette type radiographic image capturing apparatus D.

  As shown in the figure, the cassette K of this example includes two exterior members, that is, an upper exterior member 5 and a lower exterior member 6.

  A display device H and an operation button B are provided at one corner of the upper exterior member 5, and a main connector MC for receiving power supply and exchanging information with an external device is provided on one side surface. Is provided.

  FIG. 2 is a conceptual diagram illustrating an internal configuration of the cassette type radiographic image capturing apparatus D.

  Inside the cassette K, a radiation detection panel 1, a panel support plate 2, a control board 3 and a connection cable 4 are accommodated.

  The radiation detection panel 1 includes a phosphor 11 and a photoelectric conversion unit 12.

  The phosphor 11 receives radiation incident from the direction of the arrow a in the figure and emits light according to the intensity of the received radiation. The phosphor 11 is coated with a phosphor on a resin plate.

  The photoelectric conversion unit 12 includes photoelectric conversion elements arranged in a lattice pattern on a glass plate. The photoelectric conversion unit 12 receives light emitted from the phosphor 11 and converts it into an electrical signal.

  The electrical signal output from the photoelectric conversion unit 12 is sent to the control board 3 via the connection cable 4 which is a flexible circuit board. The control board 3 is based on the electrical signal sent from the photoelectric conversion unit 12. Captured image information is generated.

  The panel support plate 2 supports the radiation detection panel 1 and the control board 3, and has flatness and rigidity necessary for maintaining the flatness of the radiation detection panel 1.

  The cassette K accommodates the radiation detection panel 1 and the control board 3 supported by the panel support plate 2 as described above.

  The upper exterior member 5 of the cassette K should not be a shield when the radiation traveling from the direction of the arrow a in the figure reaches the radiation detection panel 1.

  Therefore, a material having high radiation permeability and excellent strength, for example, a resin containing carbon fiber is employed.

  The lower exterior member 6, which is another exterior member, supports the radiation detection panel 1 via support members 21, 22, and 23, and the carbon fiber is the same as the upper exterior member 5 in terms of securing strength and reducing weight. Entered resin is used.

  However, since high radiation permeability is not required, a light alloy such as an aluminum alloy may be used.

  The upper exterior member 5 and the lower exterior member 6 constituting the cassette K must be able to protect the contents against impacts applied from the outside and must not be easily separated.

  However, for regular maintenance work or repair work in response to an unexpected failure, there is also a requirement that it can be easily separated and the contained items can be removed. Must be met.

  In order to meet such requirements, generally, exterior members constituting the exterior are often joined to each other with screws.

  FIG. 3 is an example of a joint portion of the exterior member joined by screws.

  3A shows a form in which the upper exterior member 5 and the lower exterior member 6 are joined in the vertical direction, and FIG. 3B shows the upper exterior member 5 and the lower exterior member 6 joined in the lateral direction of the cassette K. It is a form.

  The screws used for joining use screws of JIS standards M2 to M3. The screws of the exterior members are designed to withstand the repeated removal of the screws 91 and to withstand the impact applied to the screws 91. The stop position A needs to have a sufficient thickness W.

  In particular, when a screw groove is cut in a resin exterior member, it is desirable to use a thicker screw so that the screw thread is not damaged when the exterior member is removed. It will be bigger.

  However, since the surface dimensions of the radiation detection panel 1 and the external dimensions of the cassette K are determined in advance according to the relationship with the photographed image size and the apparatus for loading the cassette, the thickness at the screwing position is increased. In other words, the gap between the cassette exterior member and the radiation detection panel 1 and other stored items is narrowed.

  This reduction in the gap makes it difficult to absorb the shock that prevents the shock applied to the cassette K from being transmitted to the radiation detection panel 1.

  In order to cope with such a problem, the upper exterior member 5 and the lower exterior member 6 may be joined by fitting without using screws, but desired reliability is often not obtained.

  The present invention realizes a cassette K that can be easily separated as needed while maintaining high reliability of the joint portion by joining the upper exterior member 5 and the lower exterior member 6 with an electrically peelable adhesive. It is.

  FIG. 4 is a view for explaining a joining surface of a cassette made by joining a plurality of exterior members with an electro-releasable adhesive.

  4A and 4B show a conductive bonding member 51 bonded on the surface S1 of the upper exterior member 5, and a conductive bonding member 61 bonded on the surface S2 of the lower exterior member 6. However, it has shown a mode that it joined by the electro-releasable adhesive agent in surface S3.

  Note that the bonding between the bonding member and the exterior member on the surfaces S1 and S2 is bonding that cannot be separated by mechanical bonding or bonding by an adhesive.

  In the present embodiment, the upper exterior member 5 and the lower exterior member 6 are both non-conductive members, but the lower exterior member 6 is a conductive member such as an aluminum alloy, and the joining member 61 is the lower exterior member 6. Instead of joining, a part having the same shape may be provided in the lower exterior member 6 itself.

  The upper exterior member 5 and the lower exterior member 6 are joined to the surface S3 of the joining member 51 previously joined to the upper exterior member 5 and the surface S3 of the joining member 61 joined beforehand to the lower exterior member 6. In general, the bonding member 51 and the bonding member 61 are bonded to each other after the coating.

  However, when it takes time for the electro-releasable adhesive to harden and exhibit sufficient adhesive strength, it becomes necessary to fix the upper exterior member 5 and the lower exterior member 6 with a jig or the like for a long time.

  Therefore, in the present embodiment, the joining member 51 and the joining member 61 that are joined together with the electro-releasable adhesive on the surface S3 are prepared in advance, and the surface S1 of the joining member 51, the upper exterior member 5, and the surface of the joining member 61 are prepared. S2 and the lower exterior member 6 are each joined with an instantaneous adhesive or the like.

  By doing in this way, productivity of a cassette type radiography apparatus can be improved and the reliability of joining can be improved without being limited by the curing rate of the electro-releasable adhesive.

  FIG. 5 is a diagram for explaining joining and separation by an electro-releasable adhesive.

  The joining member 51 and the joining member 61 are both conductive members, and are joined to each other at the joining surface S3 by an electro-releasable adhesive indicated by a hatched portion in the drawing.

  When a voltage as indicated by a dotted line is applied between the joining member 51 and the joining member 61 in the joined state shown in FIG. 5A, the two joined members are electrically separated as shown in FIG. 5B. Separate on the positive side of the adhesive.

  In addition, the well-known electro-releasable adhesive (for example, brand name elect release, Taiyo Wire Net Co., Ltd.) marketed can be used for the above-mentioned electro-releasable adhesive. Further, the voltage to be applied and the application time are determined by experiments.

  4 and 5, the conductive bonding member 51 bonded to the upper exterior member 5 by the electro-releasable adhesive, and the conductive bonding member 61 bonded to the lower exterior member 6 are as described above. In this joining, the thickness of the exterior member can be reduced as compared with joining by screws.

  Further, the joining member 51 and the joining member 61 that are joined to each other can be separated as necessary. As a result, the upper exterior member 5 and the lower exterior member 6 can be separated.

  FIG. 6 shows power reception by a power receiving means for applying a voltage from the outside between a conductive bonding member 51 bonded to the upper exterior member 5 and a conductive bonding member 61 bonded to the lower exterior member 6. FIG.

  The power receiving means includes a power receiving receptacle R for receiving a power supply plug, a conductive joining member 51 joined from the outlet to the upper exterior member 5, and a conductive joining member joined to the lower exterior member 6. 61 is composed of a conducting wire (not shown) for conducting electricity.

  On the front surface of the power receiving outlet R, a blocking member S for electrically blocking the power receiving outlet R from the outside is provided along the surface of the upper exterior member 5 or the lower exterior member 6.

  The blocking member S can be inserted into the power receiving outlet R when the power receiving means is not used, and is made of a known technique.

  The blocking member S prevents an erroneous voltage from being applied to the outlet and prevents an unexpected separation of the upper exterior member and the lower exterior member.

  As described above, a cassette is realized in which exterior members are joined to each other without using screws.

  Therefore, an increase in the thickness of the joint portion of the exterior member is prevented, and a sufficient space is provided between the radiation detection panel accommodated in the interior member and the electronic component related thereto, thereby improving the reliability.

  Furthermore, since the exterior member constituting the cassette can be separated as necessary, deterioration of the maintainability of the cassette type radiation imaging apparatus is prevented.

It is an external view of a cassette type radiographic imaging device. It is a conceptual diagram explaining the internal structure of a cassette type | mold radiographic imaging apparatus. It is an example of the junction part of the exterior member joined by the screw. It is a figure explaining the joint surface of a cassette made by joining a plurality of exterior members with an electric peelable adhesive. It is a figure explaining joining and isolation | separation by an electric peelable adhesive agent. It is a figure which shows the power receiving part of a power receiving means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Radiation detection panel 2 Panel support plate 3 Control board 4 Connection cable 5 Upper exterior member 6 Lower exterior member D Cassette type radiographic imaging device K Cassette S Blocking member

Claims (5)

A radiographic imaging apparatus that houses a radiation detection panel for detecting radiation transmitted through a subject in a cassette,
The cassette is composed of a plurality of exterior members,
The radiographic imaging apparatus according to claim 1, wherein the plurality of exterior members have joint surfaces that are joined to each other with an electrically peelable adhesive. The radiographic imaging apparatus according to claim 1, wherein an exterior member in which a non-conductive member and a conductive member are joined is included in the plurality of exterior members. The exterior member which has the joint surface joined by an adhesive agent and the joint surface joined by an electro-releasable adhesive agent in the said exterior member is contained in Claim 1 or 2 characterized by the above-mentioned. The radiographic imaging apparatus described. Electrically connected to the joint surface of the facing exterior member via an electro-releasable adhesive,
The radiographic imaging apparatus according to claim 1, further comprising a power receiving unit configured to receive power applied from outside. The radiographic image capturing apparatus according to claim 1, further comprising a blocking member that electrically blocks the power receiving unit from the outside.

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