Radiography equipment

Abstract

To prevent the generation of contact sound inside a housing.SOLUTION: A radiographic device comprises: a housing 100 that has an X-ray incident surface and a back face opposite to the X-ray incident surface; a radiation detection panel 106 that is accommodated in the housing 100; and a panel-like support member 107 that is accommodated in the housing 100, is arranged closer to the back face than the radiation detection panel 106, and supports the radiation detection panel 106. A surface 107b of the support member 107 facing the back face is provided with a rib 107a that forms a projection projecting in the back face direction. An elastic body 112 is arranged in correspondence with the rib 107a between the back face and the rib 107a.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a portable radiographic imaging device. [Background technology]

[0002] Radiography devices used in medical diagnostic imaging equipment and the like include stationary types that are fixed to a dedicated imaging table installed in an imaging room, and portable types that can be carried around. Portable radiological imaging devices are often held by the radiologist in order to image various parts of the subject's body, and therefore must be lightweight to improve portability while also ensuring mechanical strength to protect internal parts from the subject's weight and impacts from falling. Patent Document 1 discloses a configuration including a support member that supports a radiation detection panel, and a plurality of cylindrical first protrusions and second protrusions that are shorter in length in a direction perpendicular to the support surface than the first protrusions, both formed on the surface of the support member opposite the surface that supports the radiation detection panel. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-113403 Summary of the Invention [Problem to be solved by the invention]

[0004] One way to reduce the weight of portable radiography devices is to make the housing thinner.To achieve this, it is conceivable to use CFRP (Carbon Fiber Reinforced Plastics) as the housing material. When the housing is made of CFRP to reduce its thickness, it is more susceptible to deformation due to external forces generated during transportation of the radiography device or during use, such as imaging, compared to a housing made of metal, for example. While providing protrusions on the support member as described in Patent Document 1 makes it possible to ensure mechanical strength, increasing the number of protrusions also increases the number of points that come into contact with the housing. When the housing comes into contact with the protrusions, contact noise is generated. Contact noise generated inside the housing during transportation and use of the radiography device may significantly degrade the quality of the product.

[0005] The present invention has been made in view of the above-mentioned points, and has an object to suppress the generation of contact noise inside a housing. [Means for solving the problem]

[0006] A radiographic apparatus according to the present invention is a radiographic apparatus comprising: a housing having a radiation incident surface and a back surface opposite to the radiation incident surface; a radiation detection panel housed in the housing; and a panel-shaped support member housed in the housing, positioned on the back side of the radiation detection panel, and supporting the radiation detection panel, a fixing portion that fixes the support member and the housing so that a main surface of the support member and the back surface of the housing face each other at a first distance; On the rear surface of the support member At a position spaced apart from the fixed portion, In the rear direction Second distance only A protruding convex portion is provided, the second distance is less than the first distance; Between the rear surface and the protrusion teeth The device is characterized in that an elastic body is disposed therein. [Effects of the Invention]

[0007] According to the present invention, it is possible to suppress the generation of contact noise inside the housing, thereby maintaining the quality of the product. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram showing a radiation imaging apparatus according to a first embodiment. [Figure 2] 1 is a diagram showing a radiation imaging apparatus according to a first embodiment. [Figure 3] FIG. 10 is a diagram showing a radiation imaging apparatus according to a second embodiment. [Figure 4] FIG. 10 is a diagram showing a radiation imaging apparatus according to a second embodiment. [Figure 5] FIG. 10 is a diagram showing a radiation imaging apparatus according to a third embodiment. [Figure 6] FIG. 10 is a diagram showing a radiation imaging apparatus according to a third embodiment. [Figure 7] 10A and 10B are diagrams showing a first restricting member and a second restricting member of a radiation imaging apparatus according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. [First embodiment] A description will be given of a radiation imaging apparatus according to a first embodiment. The radiation imaging apparatus according to this embodiment is a portable radiation imaging apparatus called an electronic cassette. 1 and 2 are diagrams showing a radiographic imaging apparatus according to a first embodiment. Fig. 1(a) is a diagram showing the rear face of the radiographic imaging apparatus, and Fig. 1(b) is a cross-sectional view taken along line aa in Fig. 1(a). Fig. 2 is a diagram showing the rear face of the radiographic imaging apparatus with a back panel 104 and a battery cover 302 not shown. In the present application, the radiation incident surface (X-ray incident surface) of the radiographic imaging device is referred to as the front surface, and the surface opposite thereto is referred to as the rear surface (back surface). In the following description, for convenience of explanation, the top, bottom, left, and right in Figures 1(a) and 2 will be referred to as top, bottom, left, and right.

[0010] The radiation imaging apparatus has a thin box-shaped housing 100 that forms its exterior. Housing 100 is configured to include a front frame 101, an incident faceplate 102 attached to front frame 101, a rear frame 103, and a back plate 104 attached to rear frame 103. The front frame 101 is made of a magnesium alloy, an aluminum alloy, or the like. The entrance faceplate 102 is a member that forms the X-ray entrance surface and is made of lightweight, highly rigid CFRP with low X-ray absorption. The rear frame 103, like the front frame 101, is made of a magnesium alloy, an aluminum alloy, or the like. The back plate 104 is a member that forms the back surface and is made of lightweight, highly rigid CFRP. An opening is formed in the back plate 104 to which a battery cover 302 (see Figures 3 and 5 described below) is attached, but Figure 1(a) shows a state with the battery cover 302 removed. The front frame 101 and rear frame 103 are fixed together with fastening members 105 such as screws. A gasket (not shown) is sandwiched between the front frame 101 and the rear frame 103 to form an airtight space within the housing 100.

[0011] The housing 100 accommodates, in order from the front side (incident faceplate 102) side, a radiation detection panel 106, a support member 107, an electrical member 108, and a battery holder 110. The radiation detection panel 106 is composed of a phosphor such as GOS or CsI that receives X-rays that have passed through the subject and emits light, and a sensor panel that receives the light emitted by the phosphor and converts it into an electrical signal, and functions as an image conversion unit that converts the radiation signal into an image. The support member 107 is in the form of a generally rectangular panel having four sides, and is disposed on the rear (back plate 104) side of the radiation detection panel 106 to support the radiation detection panel 106.

[0012] The electrical member 108 is disposed on the rear surface 107 b of the support member 107 . The battery holder 110 is attached to the back panel 104 and holds a battery 111. As shown in Fig. 2, the electrical member 108 receives power from the battery 111 via a wiring 109 and drives the radiation detection panel 106.

[0013] Here, the support member 107 is provided with a rib 107a extending linearly along the surface 107b. The rib 107a forms a convex portion that protrudes toward the rear surface. The rib 107a is intended to mainly protect the electrical member 108 when an external force acts on the housing 100 and causes it to deform inward, and is disposed in a position that does not overlap with the electrical member 108 when viewed from the rear surface side, i.e., in a position different from the electrical member 108. Furthermore, the rib 107a is disposed so as to surround the electrical member 108 in order to more reliably protect the electrical member 108. "Disposing the rib 107a so as to surround the electrical member 108" does not necessarily mean that the rib 107a is disposed around the entire periphery of the electrical member 108, but also includes disposing the rib 107a around a portion of the periphery of the electrical member 108.

[0014] In this embodiment, as shown in FIG. 2, two electrical members 108 are arranged side by side near the top end of the housing 100, and a battery holder 110 is arranged near the bottom end. Ribs 107a are arranged around almost the entire periphery of the two electrical members 108 (specifically, excluding the position where the wiring 109 passes). Furthermore, approximately L-shaped ribs 107a are arranged on the left and right sides of the battery holder 110. The approximately L-shaped ribs 107a extend parallel to the left and right ends of the battery holder 110, bend 90 degrees from the ends, and are positioned between the battery holder 110 and the electrical component 108.

[0015] In addition to the components described above, the housing 100 also contains a shock absorbing component (not shown) that absorbs shock. The housing 100 also contains a shielding component (not shown). The shielding component is disposed, for example, between the radiation detection panel 106 and the support component 107 or on the inner surface of the back panel 104, and reduces the effect of scattered X-rays on the image and the electrical components 108.

[0016] A configuration for suppressing the generation of contact noise between rear panel 104 and rib 107a will be described below. When an external force acts on the back plate 104 and the back plate 104 deforms inward, the back plate 104 comes into contact with and collides with the rib 107a, causing a contact noise inside the housing 100. Therefore, elastic bodies 112 are arranged between rear panel 104 and ribs 107a in correspondence with ribs 107a. By interposing elastic bodies 112 between rear panel 104 and ribs 107a, it is possible to suppress the generation of contact noise between rear panel 104 and ribs 107a. This makes it possible to suppress the generation of contact noise inside housing 100, thereby preserving the quality of the product. Note that arranging elastic bodies 112 in correspondence with ribs 107a means arranging elastic bodies 112 in accordance with the arrangement of ribs 107a, rather than arranging, for example, a sheet-like elastic body of approximately the same size as back panel 104. Elastic bodies 112 are, for example, strip-shaped and slightly wider than ribs 107a, as shown in Fig. 2. By arranging elastic bodies 112 only in necessary locations in this way, the weight of elastic bodies 112 can be reduced, without interfering with the weight reduction of the radiological imaging device.

[0017] Furthermore, the elastic body 112 may be arranged between the rear plate 104 and a part of the rib 107a, rather than between the rear plate 104 and the entire rib 107a. More specifically, it is preferable that the elastic bodies 112 are disposed in portions of the ribs 107a located in areas of the back plate 104 that are prone to deformation. The back plate 104 is prone to deformation in its central portion and difficult to deform in its peripheral portions. In the example of FIG. 2, of the ribs 107a disposed so as to surround the two electrical components 108, the elastic bodies 112 are not disposed in peripheral portions of the back plate 104 (portions close to the left and right ends of the housing 100), but are disposed in other portions. Also, of the approximately L-shaped ribs 107a disposed on the left and right sides of the battery holder 110, the elastic bodies 112 are not disposed in peripheral portions of the back plate 104 (portions close to the bottom end of the housing 100), but are disposed in other portions.

[0018] Elastic body 112 is preferably fixed between rear plate 104 and rib 107a, but any method of fixing may be used. For example, elastic body 112 may be fixed to rear plate 104, or may be fixed to an interior part (not shown) that is arranged between rear plate 104 and rib 107a. Furthermore, elastic body 112 is preferably fixed by, for example, adhesive or screw fastening so as not to move. In addition, although there is a gap between the elastic body 112 and the rib 107a in FIG. 1(b), this gap may be omitted. Furthermore, although elastic body 112 is an independent component, it may be provided integrally with, for example, back plate 104 or an interior component (not shown) disposed between back plate 104 and rib 107a.

[0019] Elastic body 112 is required to have a mechanical strength that will not be broken by stress from back panel 104 and ribs 107a. Therefore, in order to achieve both sound deadening performance and durability of elastic body 112, it is preferable that Shore A hardness of elastic body 112 is 70 or more. In order to improve the sound deadening performance, durability, and weight of the elastic body 112, the density of the elastic body 112 is set to 1.5 g / cm 3 It is preferable that: In order to improve the durability of elastic body 112, elastic body 112 is preferably made of polyurethane resin, for example, elastomer resin.

[0020] To reduce the weight of the radiographic apparatus, a resin material, such as CFRP, is used for the material of the back plate 104. To reduce the weight of the back plate 104, it is preferable that the thickness of the back plate 104 be 1.0 mm or less, and more preferably 0.6 mm or less. In order to reduce the weight of elastic body 112, it is preferable that the thickness of elastic body 112 is equal to or less than the thickness of back panel 104, and it is preferable that the thickness of elastic body 112 is 1.0 mm or less.

[0021] [Second embodiment] Next, a radiographic imaging apparatus according to a second embodiment will be described. The same components as those in the radiographic imaging apparatus according to the first embodiment will be assigned the same reference numerals, and their description will be omitted, with the focus being on the differences from the first embodiment. 3 and 4 are diagrams showing a radiographic imaging apparatus according to a second embodiment. Fig. 3(a) is a diagram showing the rear of the radiographic imaging apparatus, (b) is a cross-sectional view taken along line bb in (a), and (c) is a cross-sectional view taken along line cc in (a). Fig. 4 is a diagram showing the rear of the radiographic imaging apparatus with the back panel 104 and battery cover 302 not shown. The direction perpendicular to the X-ray incidence surface (incident faceplate 102) and the rear surface (rear surface plate 104) is called the thickness direction, and the direction parallel to them is called the surface direction.

[0022] The radiation imaging apparatus according to the second embodiment includes a first restricting member 301. The first regulating member 301 is a member that connects the rear plate 104 or a member attached to the rear plate 104 to the support member 107. This regulates the relative positions of the rear plate 104 and the support member 107 in the thickness direction and the surface direction, and maintains the relative positions of the rear plate 104 and the support member 107 in the thickness direction and the surface direction.

[0023] In this embodiment, the battery holder 110 attached to the back plate 104 is fastened to the support member 107 using screws as first restricting members 301. Holes 303 that open to the back side are formed in two locations on the left and right sides of the battery holder 110, and screws 301 housed in these holes 303 are passed through the battery holder 110 and connected to bosses 304 provided on the support member 107. By fastening the battery holder 110 attached to the back plate 104 to the support member 107 with the screws 301 in this way, the relative positions of the back plate 104 and the support member 107 in the thickness direction and the surface direction are restricted.

[0024] By connecting the battery holder 110 and the support member back plate 104 with the first restricting member 301, the first restricting member 301 can be hidden by the battery cover 302 when viewed from the rear side. This makes it possible to make the first restricting member 301 invisible when the housing 100 is viewed from the outside. Furthermore, when thin rear panel 104 and support member 107 are connected by first restricting member 301, stress may be concentrated on rear panel 104 via first restricting member 301 due to an external force such as an impact from dropping housing 100, which may easily lead to damage to rear panel 104. By connecting battery holder 110, which is thicker than rear panel 104, and support member 107 by first restricting member 301, the risk of damage to rear panel 104 can be reduced. The positions and number of the first restricting members 301 are not limited.

[0025] The positional relationship between the elastic body 112 and the first restricting member 301 will be described below. As described in the first embodiment, the elastic body 112 is provided to suppress the generation of contact noise between the back plate 104 and the rib 107a. In the vicinity of the first restricting member 301, the relative positions of the back plate 104 and the support member 107 in the thickness direction and the surface direction are restricted, so that contact noise between the back plate 104 and the rib 107a is unlikely to occur. Therefore, the elastic body 112 does not need to be arranged with respect to the rib 107a in the vicinity of the first restricting member 301, and it is sufficient that the elastic body 112 is arranged with respect to the rib 107a at a position away from the first restricting member 301. In other words, the elastic body 112 is not arranged with respect to at least the portion of the rib 107a closest to the first restricting member 301.

[0026] 4, when viewed from the rear side, consider the straight lines connecting the first restriction member 301 to the ends of each side of the support member 107. Let X1 and X2 be the straight lines connecting the first restriction member 301 to the left and right ends of the support member 107, and Y1 and Y2 be the straight lines connecting the first restriction member 301 to the top and bottom ends of the support member 107. The lengths of the straight lines X1, X2, Y1, and Y2 are L1, L2, l1, and l2, respectively. In this case, elastic body 112 is arranged so as to correspond to the portion of rib 107a that exists on the longest straight line among straight lines X1, X2, Y1, and Y2. This is because, on the longest straight line, the restrictions on the relative positions of back panel 104 and support member 107 in the thickness direction and surface direction are weakened, which may cause contact noise between back panel 104 and rib 107a. In the example of Fig. 4, the longest straight line is Y1, so elastic body 112 is arranged at least for the portion of rib 107a that exists on straight line Y1.

[0027] Further, on the longest straight line among the straight lines X1, X2, Y1, and Y2, the elastic body 112 is disposed with respect to a portion of the rib 107a that is located at a position that is one-third or more of the length of the longest straight line and that is away from the first restricting member 301. In the example of Fig. 4, the length of the longest straight line Y1 is 11, and the elastic body 112 is disposed with respect to a portion of the rib 107a that is located at a position that is (1 / 3) x 11 or more away from the first restricting member 301.

[0028] In this embodiment, as can be seen by comparing FIG. 4 with FIG. 2 of the first embodiment, the relative positions of the back plate 104 and the support member 107 in the thickness direction and the surface direction are restricted, thereby reducing the number of locations where the elastic bodies 112 are arranged, thereby making it possible to reduce the weight of the radiographic imaging device. 4 is an example and is not limiting. For example, the elastic body 112 may be arranged according to a rule that the elastic body 112 is arranged relative to a portion of the rib 107a that is located a predetermined distance away from the first restricting member 301.

[0029] [Third embodiment] Next, a radiographic imaging apparatus according to a third embodiment will be described. The same components as those in the radiographic imaging apparatus according to the first embodiment will be denoted by the same reference numerals, and their description will be omitted, with the focus being on the differences from the first embodiment. 5 and 6 are diagrams showing a radiographic imaging apparatus according to a third embodiment. Fig. 5(a) is a diagram showing the rear surface of the radiographic imaging apparatus, (b) is a cross-sectional view taken along line dd in (a), and (c) is a cross-sectional view taken along line ee in (a). Fig. 6 is a diagram showing the rear surface of the radiographic imaging apparatus with the back panel 104 and battery cover 302 not shown. Note that the elastic body 112 is not shown in Fig. 6, but the elastic body 112 is appropriately positioned. Also, Figure 7 is a diagram showing the first and second regulating members of a radiation imaging apparatus according to the third embodiment, where (a) shows the first regulating member 301 and (b) shows the second regulating member 501.

[0030] The radiation imaging apparatus according to the third embodiment includes a first restricting member 301 and a second restricting member 501. Similar to the second embodiment, the first regulating member 301 is a member that connects the rear plate 104 or a member attached to the rear plate 104 to the support member 107. However, in this embodiment, the first regulating member 301 regulates the relative positions of the rear plate 104 and the support member 107 in the thickness direction, but does not regulate the relative positions in the surface direction. The second restricting members 501 are disposed between the housing 100 and the end faces of the support members 107, and restrict the relative position of the rear plate 104 and the support members 107 in the planar direction. The second restricting members 501 do not restrict the relative position of the rear plate 104 and the support members 107 in the thickness direction. The second restricting members 501 are disposed around the housing 100. In this case, the second restricting members 501 may be disposed over the entire periphery of the housing 100, or may be disposed at appropriate intervals around the periphery of the housing 100, as shown in FIG. 6 .

[0031] 7(a), there is a clearance r1 in the planar direction between the first restricting member 301 and the battery holder 110. The support member 107 is allowed to move in the planar direction by the clearance r1. 7(b), there is a clearance r2 in the planar direction between the second restricting member 301 and the end face of the support member 107. The support member 107 is allowed to move in the planar direction by the clearance r2. Here, the clearance r1 is set to be longer than the clearance r2 (r1>r2). This allows second restricting member 501 to receive stress in the planar direction caused by an external force, such as an impact when the housing is dropped on its side. As a result, compared to when first restricting member 301 restricts the relative positions of back plate 104 and support member 107 in the thickness direction and planar direction, it is possible to avoid stress in the planar direction being generated on back plate 104 or a member (battery holder 110) attached to back plate 104. This makes it possible to prevent damage to back plate 104 or a member (battery holder 110) attached to back plate 104.

[0032] Although the present invention has been described above with reference to the embodiments, the above embodiments are merely illustrative of specific examples of how the present invention can be implemented, and the technical scope of the present invention should not be construed as being limited by these embodiments. In other words, the present invention can be implemented in various forms without departing from its technical concept or main features. In the above embodiment, an example has been described in which the convex portion according to the present invention is configured as a linearly extending rib 107a, but this is not limitative, and the convex portion may be configured as, for example, a plurality of pillars. [Explanation of symbols]

[0033] 100: Housing, 106: Radiation detection panel, 107: Support member, 107a: Rib, 108: Electrical member, 110: Battery holder, 111: Battery, 112: Elastic body, 301: First restricting member, 501: Second restricting member

Claims

1. a housing having a radiation incident surface and a back surface facing the radiation incident surface; a radiation detection panel housed in the housing; a panel-shaped support member that is housed in the housing, that is positioned on the rear side of the radiation detection panel, and that supports the radiation detection panel, a fixing portion that fixes the support member and the housing so that a main surface of the support member and the back surface of the housing face each other at a first distance; a protrusion that protrudes a second distance in the rear direction is provided on the rear surface of the support member at a position spaced apart from the fixing portion, the second distance is less than the first distance; A radiographic imaging apparatus, characterized in that an elastic body is disposed between the rear surface and the convex portion.

2. Further comprising an electrical component, 2. The radiographic imaging apparatus according to claim 1, wherein the electrical member is disposed between the protrusion and the fixing portion on the rear surface of the support member.

3. 3. The radiographic imaging device according to claim 2, wherein the convex portion comprises a first extension portion extending in a first direction so as to surround the electrical component, and a second extension portion extending in a second direction intersecting the first extension direction.

4. a direction perpendicular to the radiation incident surface and the back surface is defined as a thickness direction; 4. The radiographic imaging apparatus according to claim 1, wherein the fixing portion includes a first restricting member that restricts the relative position between the rear surface and the support member in the thickness direction.

5. a direction parallel to the radiation incident surface and the back surface is defined as a surface direction; 5. The radiographic imaging apparatus according to claim 4, wherein the first regulating member further regulates the relative position between the rear surface and the support member in the planar direction.

6. 6. The radiographic imaging apparatus according to claim 4, wherein the first restricting member is a member that connects the rear surface or a member attached to the rear surface to the support member.

7. A battery holder for holding a battery is attached to the rear surface, 7. The radiographic imaging apparatus according to claim 6, wherein the first restricting member connects the battery holder and the support member.

8. The convex portion has a first convex portion region located between the fixed portion and the electrical member, and a second convex portion region located on the opposite side of the fixed portion with the electrical member between them, 3. The radiographic imaging apparatus according to claim 2, wherein the elastic body is not disposed in the first convex region, and the elastic body is disposed in the second convex region.

9. The support member has a generally rectangular shape with four sides, 9. The radiographic imaging device according to claim 4, wherein the elastic body is positioned relative to the convex portion located on the longest straight line connecting the first regulating member to the end of each side of the support member.

10. 10. The radiographic imaging apparatus according to claim 9, wherein the elastic body is disposed on the convex portion located at a position on the longest straight line that is at least one-third of the length of the longest straight line and away from the first restricting member.

11. a direction parallel to the radiation incident surface and the back surface is defined as a surface direction; 5. The radiographic imaging apparatus according to claim 4, further comprising a second regulating member that regulates the relative position between the rear surface and the support member in the planar direction.

12. 12. The radiographic imaging apparatus according to claim 11, wherein the second restricting member is disposed between the housing and an end surface of the support member.

13. the protrusion is a rib extending linearly along the surface on the rear side of the support member, 13. The radiographic imaging apparatus according to claim 1, wherein the elastic body is disposed between the rear surface and a part of the rib.

14. 14. The radiographic imaging apparatus according to claim 1, wherein the rear surface is made of a resin material.

15. 15. The radiographic apparatus according to claim 1, wherein the rear surface is made of CFRP.

16. 16. The radiographic imaging apparatus according to claim 1, wherein the thickness of the rear surface is 1.0 mm or less.

17. 17. The radiographic apparatus according to claim 1, wherein the elastic body has a Shore A hardness of 70 or more.

18. The density of the elastic body is 1.5 g / cm 3 18. The radiographic imaging apparatus according to claim 1, wherein:

19. 19. The radiographic apparatus according to claim 1, wherein the elastic body is made of polyurethane resin.

20. 20. The radiographic imaging apparatus according to claim 1, wherein the elastic body is made of an elastomer resin.

21. 21. The radiographic imaging apparatus according to claim 1, wherein the thickness of the elastic body is equal to or less than the thickness of the rear surface.

22. 22. The radiographic imaging apparatus according to claim 1, wherein the elastic body has a thickness of 1.0 mm or less.

23. A radiographic imaging device as described in any one of claims 1 to 22, characterized in that the elastic body is fixed to the inside of the back surface of the housing and faces the convex portion at a distance when the housing is not deformed.

Images