JP6581424B2 - Radiography equipment - Google Patents

Description

  The present invention relates to a radiation imaging apparatus.

  In medical radiography, portable radiographic imaging devices called electronic cassettes have been put into practical use in place of conventional film cassettes and CR (Computed Radiography) cassettes.

  The electronic cassette can be placed under the subject lying on the bed or held by the subject himself / herself, or attached to the holder of the imaging stand or stand for general photography. High shooting is possible.

  On the other hand, electronic cassettes have been proposed in consideration of improving the operability of the electronic cassette and reducing the burden on the subject. Patent Document 1 discloses an electronic cassette in which the thickness of the end portion of the casing is gradually reduced. Patent Document 2 discloses an electronic cassette in which the shape of the back surface of the housing is a convex curved surface. With these configurations, for example, the user can improve the insertability of the electronic cassette into the gap between the subject who is supine and the bed.

JP 2011-221361 A JP 2014-171798 A

  However, although both electronic cassettes of Patent Document 1 and Patent Document 2 refer to the shape of the back surface side of the housing, they do not refer to the front surface side that is a radiation incident surface in the housing.

  For example, the electronic cassette may be lifted after attaching or detaching a battery arranged on the back side of the electronic cassette or cleaning the back surface of the electronic cassette. However, as described above, depending on the configuration on the surface side of the electronic cassette, a sufficient gap for the finger cannot be ensured, and workability may deteriorate. For this reason, depending on the configuration on the surface side, which is the radiation incident surface in the housing, there is a possibility that the workability of the user may be reduced.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a technique for improving the workability of an operator who handles a radiation imaging apparatus.

In order to achieve the above object, a radiation imaging apparatus according to the present invention comprises the following arrangement. That is,
A radiation imaging apparatus comprising a radiation detection panel and a housing that houses the radiation detection panel,
The housing includes a first plane disposed on the radiation incident side, and a second plane disposed at a position facing the first plane,
At least one corner of the radiation detection panel is chamfered;
A first distance between the surface of the housing and the second plane at a position corresponding to the chamfered corner is shorter than a second distance between the first plane and the second plane. It is characterized by that.

  ADVANTAGE OF THE INVENTION According to this invention, the workability | operativity of the operator who handles a radiography apparatus can be improved.

It is the structure figure which looked at the radiography apparatus concerning Embodiment 1 of the present invention from the radiation incidence side. It is an internal structure figure in the AA cross section of FIG. 1 in the radiography apparatus which concerns on Embodiment 1 of this invention. It is an internal structure figure in the BB cross section of FIG. 1 in the radiography apparatus which concerns on Embodiment 1 of this invention. It is a figure showing the state which set | placed the radiography apparatus which concerns on Embodiment 1 of this invention so that an entrance plane may face downward. It is an internal structure figure in the corner | angular part of the radiography apparatus which concerns on Embodiment 2 of this invention. It is an internal structure figure in the corner | angular part of the radiography apparatus which concerns on the modification of Embodiment 2 of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Throughout the embodiment, the same reference numerals are assigned to the same components.

(Embodiment 1)
1 to 4 show a configuration example of the radiation imaging apparatus 101 according to the first embodiment. FIG. 1 is a view of an electronic cassette 101 according to Embodiment 1 of the present invention as viewed from the radiation incident side. 2 shows an internal structure diagram in the AA section of FIG. 1, and FIG. 3 shows an internal structure diagram in the BB section of FIG. FIG. 4 is a diagram illustrating a state in which the radiation imaging apparatus 101 in FIG. 1 is arranged so that the radiation incident surface faces downward. In the following description, in the radiation imaging apparatus 101, a surface irradiated with radiation is referred to as a radiation incident surface (first plane), and a surface facing the radiation incident surface in the housing 102 is referred to as a back surface (second plane). Call.

  First, in FIG. 1, the radiation imaging apparatus 101 houses a radiation detection panel 103 in a housing 102. The casing 102 has a thickness of about 15 mm with respect to the radiation incident surface, and has a substantially rectangular parallelepiped shape. The stored radiation detection panel 103 has a rectangular plate shape with a thickness of about 1 mm. Details of the glass substrate 109, the protective sheet material 110, and the flexible printed wiring board (FPC) 111 will be described later.

  Next, the internal configuration of the radiation imaging apparatus 101 will be described with reference to FIG. The housing 102 houses the support member 104 and the electric substrate 106 together with the radiation detection panel 103. The support member 104 is a structure that supports the radiation detection panel 103, and fixes the radiation detection panel 103 to the radiation incident surface side using the adhesive layer 105. Further, the back surface side of the radiation detection panel 103 includes a plurality of leg portions 104 a, and these leg portions 104 a are joined to the inner wall of the housing 102.

  The radiation detection panel 103 supports the phosphor 107 that converts incident radiation into visible light, the photoelectric conversion elements 108 arranged in a lattice pattern that converts the converted visible light into electrical signals, and the photoelectric conversion elements 108. A glass substrate 109 is laminated and formed. Further, the entire surface of the phosphor 107 is covered with a protective sheet material 110 for light shielding and moisture prevention. The protective sheet material 110 is made of a material obtained by combining, for example, an aluminum foil having a thickness of about 0.1 mm and a resin sheet. The four sides around the protective sheet material 110 are bonded to the glass substrate 109 by hot melt or the like, and the phosphor 107 is sealed.

  The adhesion region between the glass substrate 109 and the protective sheet material 110 is a region indicated by a length L1. One end of a flexible printed wiring board (FPC) 111 is connected to the outside of the adhesion region of the glass substrate 109 by a method such as pressure bonding, and this joining region is a region indicated by a length L2. Note that a connector may be provided at this position so that the FPC 111 can be attached and detached. Further, the other end of the FPC 111 is connected to an electric substrate 106 disposed in a gap provided between the support member 104 and the housing 102 by a leg portion 104a. The casing 102 having a substantially rectangular parallelepiped shape has six surfaces: a front surface 102a that is a radiation incident surface, four side surfaces 102b, and a rear surface 102c that faces the surface.

  Furthermore, the radiation imaging apparatus 101 has a detachable battery 112 on the back surface 102c. The radiation imaging apparatus 101 can be used in various medical fields by enabling battery replacement by attaching and detaching. When the battery is attached or detached, the radiation imaging apparatus is placed on an imaging table or desk so that the surface 102a of the radiation imaging apparatus faces downward.

  Here, C part shown by C of FIG. 1 represents the shape of the radiation detection panel 103 inside the housing | casing 102 in a corner | angular part. The phosphor 107 of the radiation detection panel 103 is covered with the protective sheet 110 as described above, and the corner of the protective sheet 110 has an arc shape with a radius R = L1, so that an adhesive length L1 is secured. ing. Further, since there is no connection of the FPC 111 at the corner, it is not necessary to secure the joining length L2. Therefore, the corner of the glass substrate 109 can be chamfered so as to be perpendicular to the main plane of the radiation detection panel 103 at a position close to the protective sheet 110. The details of chamfering will be described below with reference to FIG.

  FIG. 3 shows the internal structure of the corner (the BB cross section of FIG. 1) of the radiation imaging apparatus 101. At least one corner of the radiation detection panel 103 is chamfered. The corner portion formed by chamfering is referred to as a chamfered portion in the following description. In FIG. 3, the broken line portion of the glass substrate 109 is shortened by providing the chamfer 109C. Thereby, in the BB sectional view of FIG. 3, the corner wall surfaces of the surface 102 a and the side surface 102 b can be brought closer to the radiation detection panel 103 side as compared with the AA sectional view of FIG. 2. In FIG. 3, an inclined surface 102d is provided from a point D on the side surface 102b of the housing 102 that is separated from the surface 102a of the housing 102 by a distance L3.

  A distance X1 (first distance) between the inclined surface 102d of the housing 102 and the surface 102c at a position corresponding to the position of the chamfered portion of the radiation detection panel 103 is a distance X2 (second distance) between the surface 102a and the surface 102c. ) Is configured to be shorter. On the other hand, as shown in FIG. 2, a distance X3 (first) between the surface of the housing 102 and the surface 102c at a position corresponding to a position other than the chamfered portion (other than the chamfered corner portion) of the radiation detection panel 103. 3) is almost the same as the distance X2. Although it is substantially the same in the example of FIG. 2, the distance X3 may be longer than the distance X1 and shorter than the distance X2 (longer than the first distance and shorter than the second distance).

  FIG. 4A illustrates a state in which the radiation imaging apparatus 101 according to the first embodiment is placed on a flat plate 123 such as an imaging table or a desk so that the surface 102a of the housing faces downward. FIG. A gap (gap 401) that is open to the outside is secured at the corner. By placing a finger on this gap, it is easy to lift the radiation imaging apparatus 101 in the downward state.

  Note that it is possible to insert a fingertip of about 10 mm into a gap of about 6 mm. Required by experiment. Regarding the gap L3 in FIG. 4A, the radiation imaging apparatus 101 can be lifted by inserting a fingertip of about 10 mm. L3 corresponds to the maximum value of the distance between the inclined surface 102d and the surface 102c, and it is preferable that L3 ≧ 6 mm or more is secured. Note that in the radiation imaging apparatus 101 of the present embodiment, the corners on the back surface side of the housing 102 may be inclined.

  In FIG. 4A, an example in which an inclined surface is provided from the side surface to the surface of the housing 102 and smoothly connected is shown. However, it is configured by a curved surface having a large curvature, or as shown in FIG. Even with a configuration having a large step, a gap (gap 402) opened to the outside is secured. In any configuration, any shape may be used as long as a gap opened to the outside is secured at the corner on the surface side of the radiation imaging apparatus.

  In addition, according to the shape that secures a gap in the corner as described in the present embodiment, it is possible to provide a housing that suppresses the protrusion of the corner. When the radiation imaging apparatus is inserted under the subject and imaging is performed, an effect of alleviating the contact of the corner portion where the contact with the subject is particularly strong can be obtained. Although the front side has been described so far, it is possible to use a chamfered portion of the radiation detection panel on the back side of the housing to increase the gap between the corners.

  As described above, the radiation imaging apparatus according to the present embodiment is the radiation imaging apparatus 101 including the radiation detection panel 103 and the casing 102 that houses the radiation detection panel 103, and the casing 102 is configured to receive radiation. A first plane (surface 102 a) disposed on the side and a second plane (surface 102 c) disposed at a position facing the first plane, and a housing at at least one corner of the housing 102. The first distance between the surface (surface 102d) of the body 102 and the second plane (surface 102c) is greater than the second distance between the first plane (surface 102a) and the second plane (surface 102c). short.

  In other words, when the first flat surface (surface 102 a) is placed on the flat plate 123, the housing surface 102 d and the flat plate 123 are not in contact with each other at at least one corner of the housing 102. Openings 401 and 402 opened to the side of the body 102 are formed.

  In other words, the inclination of the corner of the first plane (the surface 102a of the housing on the radiation incident side) is configured to be larger than the inclination of the side of the first plane.

  As a result, the radiation imaging apparatus placed on a flat plate or the like can be easily held by placing a finger in the corner gap. Accordingly, it is possible to improve workability such as maintenance performed by the operator while maintaining highly versatile outer dimensions and usability to the subject.

(Embodiment 2)
In the second embodiment, an example in which the chamfering amount of the chamfered portion of the radiation detection panel is increased as compared with the first embodiment by changing the bonding structure of the corners of the protective sheet material of the phosphor will be described. FIG. 5A and FIG. 5B are cross-sectional views of the corner portions corresponding to FIG. 3 described in the first embodiment in the first embodiment. The radiation detection panel 103 has the same layer configuration as that of the first embodiment. However, the chamfering amount at the corner of the glass substrate 109 is increased to a position close to the phosphor 107. Accordingly, as shown in FIG. 5A, the adhesion region of the protective sheet 110 covering the phosphor 107 reaches the end surface of the chamfered portion of the glass substrate 109.

  Further, depending on the thickness of the glass substrate 109 and the required length of adhesion, as shown in FIG. In this case, the thickness of the folded protective sheet 110 is absorbed by the adhesive layer 105. 5A and 5B, an inclined surface 102e is provided from a point on the side surface 102b of the housing 102 that is a distance L4 (> L3) away from the surface 102a of the housing 102. Thereby, the freedom degree of the shape of the corner | angular part of a housing | casing increases and it becomes possible to ensure the clearance gap for an operator to hold large.

  FIG. 6 is a diagram illustrating a modification of the second embodiment. By using a metal foil such as an aluminum foil, the protective sheet 110 can have a function of reducing the influence of external radiation noise as well as shielding light and moisture. In this case, a shield structure for the photoelectric conversion element 108 is formed by grounding the protective sheet 110 to a metal member or an electric substrate. In the example of FIG. 6, the ground connection portion 113 is provided at the corner of the protective sheet 110, passes through the end surfaces of the glass substrate 109 and the panel support plate 104, is drawn out to the back surface side, and is connected to the support member 104.

  By providing the ground connection portion 113 at the chamfered portion of the radiation detection panel 103, contact with the FPC 111 disposed around the radiation detection panel 103 can be prevented.

  As described above, the radiation detection panel 103 according to the present embodiment supports the phosphor 107 that converts radiation into visible light, the photoelectric conversion element 108 that converts visible light into an electrical signal, and the photoelectric conversion element 108. A glass substrate 109 is laminated and the phosphor 107 is covered with a protective sheet material 110. In FIG. 5A, the protective sheet material 110 reaches the end surface of the glass substrate 109 in the chamfered portion. In FIG.5 (b), in a chamfering part, the protection sheet material 110 reaches to the surface on the opposite side to the surface which supports the photoelectric conversion element 108 of the glass substrate 109. FIG. In FIG. 6, in the chamfered portion, the protective sheet material 110 covers the end surface of the support member 104 and the surface opposite to the surface that supports the radiation detection panel 103.

  As described above, according to the present embodiment, the degree of freedom of the shape of the corner of the housing is increased, and a large gap for the operator to hold can be secured. Therefore, workability at the time of maintenance performed by the operator can be improved while maintaining highly versatile external dimensions and usability to the subject.

  101: Radiation imaging apparatus, 102: Housing, 103: Radiation detection panel, 104: Support member, 105: Adhesive member, 106: Electric substrate, 107: Phosphor, 108: Photoelectric conversion element, 109: Glass substrate, 110: Protective sheet, 111: Flexible printed circuit board (FPC), 112: Battery, 113: Connection part for grounding

Claims (8)

A radiation imaging apparatus comprising a radiation detection panel and a housing that houses the radiation detection panel,
The housing includes a first plane disposed on the radiation incident side, and a second plane disposed at a position facing the first plane,
At least one corner of the radiation detection panel is chamfered;
A first distance between the surface of the housing and the second plane at a position corresponding to the chamfered corner is shorter than a second distance between the first plane and the second plane. A radiographic apparatus characterized by that. Third distance between the surface and the second plane of the housing at a position corresponding to the position other than the corners which is the chamfer to claim 1, characterized in that longer than the first distance The radiation imaging apparatus described. The radiation imaging apparatus according to claim 2 , wherein the third distance is longer than the first distance and equal to or less than the second distance. The radiation imaging apparatus according to any one of claims 1 to 3, characterized in that the maximum value of the difference between said first distance and said second distance is more than 6mm. The radiation detection panel is formed by laminating a phosphor that converts radiation into visible light, a photoelectric conversion element that converts the visible light into an electrical signal, and a glass substrate that supports the photoelectric conversion element. The phosphor is covered with a protective sheet material,
Wherein the chamfered corners, said protective sheet material radiographic apparatus according to any one of claims 1 to 4, characterized in that up to the end face of the glass substrate. 6. The radiographic apparatus according to claim 5 , wherein the protective sheet material extends to a surface opposite to a surface of the glass substrate that supports the photoelectric conversion element at the chamfered corner portion. A support member for supporting the radiation detection panel;
The radiographic apparatus according to claim 5 , wherein the chamfered corner portion covers the end surface of the support member and a surface opposite to a surface that supports the radiation detection panel. A radiation imaging apparatus comprising a radiation detection panel and a housing that houses the radiation detection panel,
As a corner portion where the side portions of the surface of the housing on the radiation incident side intersect each other,
Wherein the radiation incident side, before Symbol size of the corner of the inclination is, the radiation imaging apparatus that being greater than the magnitude of the slope of the front SL side portion.

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