JP2019027834A - Radiation imaging apparatus - Google Patents

Abstract

To provide a radiation imaging apparatus capable of reducing influences from radiation noises from the outside while radiating heat generated by a heat source without increasing the size and weight of the radiation imaging apparatus.SOLUTION: A radiation imaging apparatus 1a comprises: a radiation detection unit 11 having an effective imaging area 101 for converting incident radiation into an electric signal; and a heat dissipation member 14a including a heat source emitting heat being in contact therewith to dissipate the heat from the heat source to the outside. The heat dissipation member 14 is provided with an outer periphery portion enclosing the outer side of the effective imaging area 101 in a view from a direction perpendicular to the plane of the effective imaging area 101 and at least the outer periphery has conductivity.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a radiation imaging apparatus.

  In the medical field, a radiographic apparatus that irradiates a subject with radiation and obtains a radiographic image based on the intensity distribution of the radiation transmitted through the subject is used. In recent years, digital radiography apparatuses that generate digital radiographic images have been used. When radiation noise enters the digital radiography apparatus from the outside, noise may be generated in the radiation detector. The digital radiographic apparatus is provided with a circuit board for controlling the radiation detector and a battery for supplying power for operation. Since these circuit boards and batteries may generate heat, the heat generated by these must be dissipated to the outside. In the medical field, a portable radiographic apparatus may be used. A portable radiation imaging apparatus is required to be small and have a shape so that the user can carry and carry it.

JP 2004-327825 A Japanese Patent Application Laid-Open No. 11-34595

  Patent Document 1 discloses a radiation imaging apparatus in which a shielding member having a shielding function is provided on the radiation incident surface side in order to shield radiation noise incident from the radiation incident surface side. However, with such a configuration, it is not possible to reduce the influence of radiation noise from a direction different from the radiation incident surface side, for example, from the side opposite to the incident surface. For this reason, a shield member is further required separately from the shield member provided on the incident surface side. Further, in the configuration described in Patent Document 1, the shield function is disclosed, but the heat dissipation function is not disclosed. Patent Document 2 discloses a heat dissipation function by a heat pipe, but does not disclose a shield function against radiation noise.

  There is a demand for a radiographic apparatus having two functions of a shield function and a heat dissipation function. However, in the configuration in which members having these functions are separately provided, the radiographic apparatus is increased in size and weight. In view of the above situation, the problem to be solved by the present invention is that the influence of radiation noise incident from the outside can be reduced and the heat generated by the heat source can be dissipated while suppressing the increase in size and weight of the radiation imaging apparatus. Is to do so.

  In order to solve the above-described problems, the present invention provides a radiation imaging apparatus having a radiation detector provided with an effective imaging region for converting incident radiation into an electrical signal, and a heat source that generates heat, A heat radiating member that is in contact and radiates heat of the heat source to the outside, and the heat radiating member has an outer peripheral portion that surrounds the outside of the effective imaging region in a direction perpendicular to the surface direction of the effective imaging region. Provided, and at least the outer peripheral portion has conductivity.

  ADVANTAGE OF THE INVENTION According to this invention, the influence of the radiation noise which injects from the outside can be reduced, and the heat | fever which a heat source emits can be thermally radiated, suppressing the enlargement and weight increase of a radiography apparatus.

The figure which shows the structural example of the radiography apparatus in 1st Embodiment. The figure which shows the structural example of the heat radiating member which concerns on 1st Embodiment. The figure which shows the structural example of the heat radiating member which concerns on 2nd Embodiment. The figure which shows the structural example of the radiography apparatus which concerns on 3rd Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the component common in each embodiment.

  In each embodiment of the present invention, a portable electronic cassette (digital cassette type radiation imaging apparatus) used in the medical field is shown as an example of a radiation imaging apparatus to which the present invention is applied. An electronic cassette used in the medical field detects radiation that has been exposed from a radiation source and transmitted through a subject, and generates a radiation image according to the intensity distribution of the detected radiation. However, the radiographic apparatus to which the present invention can be applied is not limited to an electronic cassette used in the medical field. For example, the present invention can be applied to radiation imaging apparatuses used in various fields such as a nondestructive inspection apparatus and an analysis apparatus.

<First Embodiment>
First, a configuration example of the radiation imaging apparatus 1a according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a diagram schematically illustrating a configuration example of a radiation imaging apparatus 1a according to the first embodiment, in which (a) is an exploded perspective view and (b) is a cross-sectional view. For convenience of explanation, the side on which radiation is incident during imaging is referred to as “incident side”, and the opposite side is referred to as “back side”. In FIG. 1, the upper side in the figure is the incident side, and the lower side is the back side.

  As shown in FIG. 1, the main units of the radiation imaging apparatus 1a according to the first embodiment are a radiation detector 11, a circuit board 12, a battery 13, a heat radiating member 14a, an incident side housing 15, and a rear surface. Side housing 16.

  A flat panel detector (FPD) is applied to the radiation detector 11. However, the specific configuration of the radiation detector 11 is not particularly limited. The radiation detector 11 may be a direct conversion method or an indirect conversion method. The direct-conversion radiation detector has an effective imaging region 101 (pixel region) in which a radiation-sensitive semiconductor such as a-Si (amorphous silicon) and a switching element (electronic element) such as a TFT are two-dimensionally arranged. Also called). Then, the radiation incident on the effective imaging region 101 is converted into an electrical signal. The indirect conversion type radiation detector includes a wavelength conversion unit (such as a scintillator) that emits fluorescence according to the intensity of incident radiation, a semiconductor that converts the fluorescence emitted by the wavelength conversion unit (converts it into an electrical signal), and a switching element. And an effective imaging region 101 arranged two-dimensionally.

  In any type of radiation detector, noise may be generated in an electrical signal (voltage or current) generated in the effective imaging region 101 due to the influence of radiation noise from the outside. In the medical field, a radiation detector having a large area of the effective imaging region 101 may be used. However, the larger the area of the effective imaging region 101, the more easily affected by radiation noise from the outside. For this reason, in 1st Embodiment, the function to reduce the influence of the radiation noise from the outside is given to the thermal radiation member 14a mentioned later.

  The circuit board 12 and the battery 13 are examples of heat sources included in the radiation imaging apparatus 1a. The circuit board 12 is a board on which a circuit for controlling the radiation detector 11 is provided. In FIG. 1, as a circuit board 12 provided in the radiation imaging apparatus 1a, a first circuit board 121, a second circuit board 122, and a third circuit board 123 are shown as an example. The first circuit board 121 is disposed along the long side of the radiation detector 11. For example, the first circuit board 121 is provided with a drive circuit that drives a switching element or the like provided in the effective imaging region 101. The second circuit board 122 is arranged along the short side of the radiation detector 11. For example, the second circuit board 122 is provided with a readout circuit that reads an electrical signal generated in the effective imaging region 101. The third circuit board 123 is a circuit board different from the first circuit board 121 and the second circuit board 122. The specific configurations of the first circuit board 121, the second circuit board 122, and the third circuit board 123 are not particularly limited. The circuit board 12 provided in the radiation imaging apparatus 1a is not limited to the first circuit board 121, the second circuit board 122, and the third circuit board 123 described above. Furthermore, the radiation imaging apparatus 1a may be configured to include only some of the first circuit board 121, the second circuit board 122, and the third circuit board 123 described above.

  The battery 13 supplies driving power to each part of the radiation imaging apparatus 1a. The configuration of the battery 13 is not particularly limited, and various known secondary batteries can be applied.

  The heat radiating member 14a is a member for radiating heat generated by the circuit board 12 and the battery 13 which are examples of heat sources to the outside of the radiation imaging apparatus 1a. Moreover, the heat radiating member 14a also has a function of reducing the influence of external radiation noise. The heat dissipating member 14a is a plan view of the radiation detector 11 provided in the radiation imaging apparatus 1a (referred to as a direction view perpendicular to the surface direction of the effective imaging region 101 of the radiation detector 11. Hereinafter, simply referred to as a plan view). Is substantially quadrilateral and has a frame-like (loop-like) configuration in which an opening 143 is provided on the inner peripheral side. That is, the heat radiating member 14 a has a substantially quadrangular outer peripheral portion 140, and an opening 143 is provided on the inner peripheral side of the outer peripheral portion 140. In plan view, the inner dimension of the opening 143 of the heat radiating member 14a is larger than the outer dimension of the radiation detector 11, and the radiation detector 11 can be arranged on the inner peripheral side thereof.

  The heat radiating member 14 a includes a heat transfer portion 145 and a heat radiating portion 146. The heat transfer part 145 is a part that becomes a path for moving the heat generated by the circuit board 12 and the battery 13 to the heat dissipation part 146. The heat radiating unit 146 is a part that radiates heat transferred from the circuit board 12 and the battery 13 through the heat transfer unit 145 to the outside. In FIG. 1, three of the four sides of the outer peripheral portion 140 of the heat radiating member 14a (two long sides and one short side) are heat transfer portions 145, and the remaining one side (the other short side) is radiating heat. A configuration that is the unit 146 is shown as an example.

  The heat transfer unit 145 is formed by a heat pipe 144. The heat pipe 144 is generally in a linear shape and in an L shape. However, the principle of transferring heat is the same regardless of the shape. Specifically, a working fluid is sealed inside the heat pipe 144. Then, the cycle of “the working fluid evaporates in the high temperature part and becomes gas and moves to the low temperature part, and the gas is cooled in the low temperature part and becomes liquid and moves to the high temperature part” is repeated. Thereby, heat moves from the high temperature part of the heat pipe 144 to the low temperature part. The heat pipe 144 is formed of a material having high thermal conductivity such as copper or aluminum alloy. Furthermore, the heat pipe 144 is formed of a conductive material.

  The heat radiating portion 146 is formed of a material having high thermal conductivity such as metal, and has a rod-like configuration, for example. The heat radiation part 146 is exposed to the outside of the incident side housing 15 and the back side housing 16 so that the heat of the heat source can be radiated to the outside of the radiation imaging apparatus 1a.

  A heat pipe 144 extends from at least one of the four sides of the outer peripheral portion 140 of the heat radiating member 14 a toward the inner peripheral side of the opening 143. For convenience of explanation, such a portion is referred to as an “extension portion 141”. In FIG. 1, a configuration in which two extending portions 141 are provided is shown as an example. However, the number and dimensions of the extending portions 141 are not particularly limited. The number and dimensions of the extending portions 141 are appropriately set according to the number and dimensions of the third circuit board 123, the dimensions of the battery 13, and the like.

  And the radiation detector 11 is arrange | positioned at the inner peripheral side of the opening part 143 of the heat radiating member 14a, and the circuit board 12 and the battery 13 are arrange | positioned at the back side of the heat radiating member 14a and the radiation detector 11. FIG. As described above, the inner dimension of the opening 143 of the heat radiating member 14a is larger than the outer dimension of the radiation detector 11, and the radiation detector 11 can be disposed so as to be inserted into the inner peripheral side of the opening 143 of the heat radiating member 14a. In a state where the radiation detector 11 is disposed on the inner peripheral side of the opening 143 of the heat dissipation member 14a, the outer peripheral portion 140 of the heat dissipation member 14a surrounds the periphery of the radiation detector 11 in a loop shape in plan view. For this reason, in plan view, the outside of the effective imaging region 101 of the radiation detector 11 is surrounded by the loop-shaped outer peripheral portion 140. In other words, the four sides of the outer peripheral portion 140 of the heat radiation member 14a are located outside the effective imaging region 101 of the radiation detector 11 in plan view.

  In the configuration in which the extended portion 141 of the heat pipe 144 is provided on the heat radiating member 14a, the radiation detector 11 is disposed on the incident side of the extended portion 141 of the heat pipe 144, and the circuit board 12 and the battery 13 are connected to the heat pipe. It is arranged on the back side of the extended portion 141 of 144.

  The first circuit board 121 is in contact with the back side of the long side formed by the heat pipe 144 among the four sides of the outer peripheral portion 140 of the heat dissipation member 14a. The second circuit board 122 is in contact with the back side of the short side formed by the heat pipe 144 among the four sides of the outer peripheral portion 140 of the heat radiating member 14a. The third circuit board 123 is in contact with the back side of the extended portion 141 of the heat pipe 144. The battery 13 is in contact with at least one back side of the extending portion 141 of the heat pipe 144. Although FIG. 1 shows a configuration in which the battery 13 is in contact with one extending portion 141 of the heat pipe 144, a configuration in which two or more extending portions 141 are in contact may be used.

  As described above, the circuit board 12 and the battery 13 which are heat sources are disposed in the vicinity of the heat pipe 144 and are in contact with the heat pipe 144 in order to transfer heat to the heat pipe 144. The heat transmitted to the heat pipe 144 moves to the heat radiating unit 146 and is radiated from the heat radiating unit 146 to the outside of the radiation imaging apparatus 1a. By arranging the circuit board 12 and the battery 13 and the heat pipe 144 of the heat radiating member 14a close to each other, heat generated by the circuit board 12 and the battery 13 can be efficiently transmitted to the heat pipe 144. In the first embodiment, both the circuit board 12 and the battery 13 are shown as examples of the heat source, but only one of them may be used. That is, it is only necessary that at least one of the circuit board 12 and the battery 13 is in contact with the heat radiating member 14a to radiate heat. Further, even when the circuit board 12 is an example of a heat source, the first circuit board 121, the second circuit board 122, and the third circuit board 123 are not all in contact with the heat dissipation member 14a. Also good. That is, it is sufficient if at least a part of the first circuit board 121, the second circuit board 122, and the third circuit board 123 is in contact with the heat radiating member 14a to radiate heat.

  Moreover, the outer peripheral part 140 (the heat-transfer part 145 and the heat radiating part 146) of the heat radiating member 14a is formed of a conductive material. For this reason, in a state where the radiation detector 11 is arranged on the inner peripheral side of the opening 143 of the heat radiating member 14a, a loop-shaped circuit is formed so as to surround the radiation detector 11 by the outer peripheral portion 140 of the heat radiating member 14a. It is formed. With this configuration, when radiation noise is incident from the outside, a current in a direction that cancels the radiation noise incident on the outer peripheral portion 140 of the heat dissipation member 14a is generated by the induced electromotive force. Therefore, for example, it is possible to prevent or suppress the generation of noise in the electrical signal generated by the radiation detector 11.

  An incident side casing 15 is provided on the incident side of the radiation detector 11, the heat radiation member 14 a, the circuit board 12, and the battery 13, and a back side casing 16 is provided on the back side. The radiation detector 11, the heat radiating member 14 a, the circuit board 12, and the battery 13 are accommodated between the incident-side casing 15 and the back-side casing 16. In addition, the incident side housing | casing 15 and the back side housing | casing 16 should just be the structure which can accommodate the radiation detector 11, the thermal radiation member 14a, the circuit board 12, and the battery 13 among them, and a specific structure is especially limited. Not. In order to reduce the weight of the radiation imaging apparatus 1a, resin materials such as ABS, polycarbonate, and epoxy resin can be applied to the incident-side casing 15 and the back-side casing 16, for example. Furthermore, in order to improve the strength, for example, a fiber reinforced resin such as CFRP or GFRP may be applied. In the first embodiment of the present invention, the heat radiating member 14a has a function of canceling radiation noise, and therefore, it is not necessary to use metal for the incident side casing 15 and the back side casing 16.

  At least one of the incident-side casing 15 and the back-side casing 16 is provided with an opening (referred to as a casing opening 161 for convenience of description), and the heat radiating portion 146 of the heat radiating member 14a is provided in the case opening. 161 is exposed to the outside through 161. In FIG. 1, a configuration in which the housing opening 161 is provided in the rear housing 16 is shown as an example, but a configuration in which the housing opening 161 is provided in the incident housing 15 may be used. A configuration in which the housing opening 161 is provided in both the body 16 and the incident-side housing 15 may be employed. The point is that the heat radiating portion 146 of the heat radiating member 14a may be configured to be exposed to the outside of the incident side housing 15 and the back side housing 16 (that is, outside the radiation imaging apparatus 1a).

  Next, an example of the joining structure of the heat pipe 144 will be described with reference to FIG. FIG. 2 is a schematic diagram illustrating an example of a connection structure of the heat pipes 144. In the example shown in FIG. 2, four L-shaped heat pipes 144 are joined at the joint portion 147 and formed as a “U” shape as a whole. That is, the four L-shaped heat pipes 144 are joined at the joint portion 147, so that the three sides of the outer peripheral portion 140 are formed. Further, the end portion in the longitudinal direction of the heat radiating portion 146 is joined to the end portion of the “U” shape (the end portions of two parallel sides of the three sides) by the joining portion 147. Thereby, one heat radiating portion 146 forms one short side of the outer peripheral portion 140. In this way, the four L-shaped heat pipes 144 and the one heat radiating portion 146 are joined to each other so as to have a substantially quadrilateral outline as a whole. Thereby, while the outer peripheral part 140 of the thermal radiation member 14a is formed, the extension part 141 extended to the inner peripheral side of the opening part 143 is formed. 2 shows an example in which the L-shaped heat pipe 144 is applied to the heat dissipation member 14a, a configuration in which a linear heat pipe 144 is applied may be used.

  Note that heat and electric inert gas welding, gas welding, arc welding, brazing, and the like can be applied to the joining of the heat pipes 144 and the joining of the heat pipe 144 and the heat radiating portion 146. In short, any structure may be used as long as it has a high heat transfer rate and is joined so as to be electrically conductive.

  The heat pipes 144 are all arranged so that the side near the heat radiating portion 146 is a low temperature portion and the side far from the heat radiating portion 146 is a high temperature portion. Therefore, the direction of heat transfer in the heat radiating member 14a is the direction from the side far from the heat radiating portion 146 toward the heat radiating portion 146, as shown by the arrow in FIG. The heat radiating portion 146 is made of a material having high thermal conductivity, and is exposed to the outside of the radiation imaging apparatus 1a (outside of the incident-side housing 15 and the back-side housing 16). According to such a configuration, the heat transmitted from the heat pipe 144 to the heat radiating unit 146 is radiated to the outside of the radiation imaging apparatus 1a.

  Thus, the heat radiating member 14a can radiate the heat generated by the heat source such as the circuit board 12 and the battery 13 to the outside of the radiation imaging apparatus 1a. Further, the outer peripheral portion 140 of the heat radiating member 14a is provided so as to surround the radiation detector 11 (particularly the effective imaging region 101). For this reason, when radiation noise is incident on the outer peripheral portion 140, a current flows in a direction to cancel the radiation noise by the induced electromotive force, and the influence of the radiation noise can be reduced. With such a configuration, the radiation imaging apparatus 1a can be provided with a shielding function against radiation noise without using a metal casing or providing a shield member separately from the heat dissipation member 14a. Therefore, it is possible to provide both a function of radiating heat generated by a heat source such as the circuit board 12 and the battery 13 and a shielding function against radiation noise while suppressing an increase in size and weight of the radiation imaging apparatus 1a. .

  For example, for radiographic apparatuses used in the medical field, demands for continuous imaging and video imaging have increased along with the development of cardiovascular systems such as the heart and the development of IVR technology. In order to meet such demand, development of an angiographic system such as a C-arm imaging apparatus and a radiographic television for fluoroscopy has been underway. When continuous shooting or moving image shooting is performed, the continuous operation time of the radiation imaging apparatus becomes longer than when shooting a still image. If the continuous operation time becomes long, circuit boards and batteries provided in the radiation imaging apparatus are likely to become high temperature, and a heat dissipation mechanism for cooling them must be provided. In addition, the demand for radiographic apparatuses equipped with a moving image capturing function is spreading to portable radiographic apparatuses (portable electronic cassettes) carried and carried by an operator. A portable radiographic apparatus is required to be small and lightweight for the user to carry and carry. According to the first embodiment of the present invention, by providing the heat radiating member 14a with a shielding function, it is not necessary to provide a shield member separately from the heat radiating member 14a. Therefore, the radiation imaging apparatus 1a is increased in size and weight. Can be suppressed.

Second Embodiment
Next, a configuration example of the radiation imaging apparatus 1b according to the second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a diagram schematically illustrating a configuration example of the heat source (the circuit board 12 and the battery 13) and the heat dissipation member 14b in the radiation imaging apparatus 1b according to the second embodiment. The second embodiment is different from the first embodiment in the arrangement positions of the third circuit board 123, which is an example of a heat source, and the battery 13. Further, the extending portion 141 of the heat pipe 144 is not provided on the heat radiating member 14b. As shown in FIG. 3, the heat radiating member 14b has a substantially quadrangular frame shape (loop shape) in plan view. The heat radiating member 14b has the outer peripheral portion 140 but does not have the extending portion 141. And each of the third circuit board 123 and the battery 13 is any one of sides (that is, the heat transfer portion 145) formed by the heat pipe 144 out of the four sides of the outer peripheral portion 140 of the heat radiating member 14b. And is in contact with the back side of the heat pipe 144.

  In other words, in the first embodiment, at least a part of the circuit board 12 (third circuit board 123) and the battery 13 are in contact with the extending portion 141 of the heat pipe 144. On the other hand, in the second embodiment, all the circuit boards 12 and the batteries 13 are in contact with the side (the heat transfer unit 145) formed by the heat pipe 144 among the four sides of the outer peripheral part 140. In the second embodiment, the third circuit board 123 and the battery 13 are arranged on the back side of the heat radiating member 14b, like the first circuit board 121 and the second circuit board 122, and the heat radiating member It contacts the back side of the heat pipe 144 of 14b.

  According to the second embodiment, the same effects as those of the first embodiment can be obtained. Furthermore, according to the second embodiment, the capacity of the heat pipe 144 can be reduced, and the overall weight of the radiation imaging apparatus 1b can be reduced. Moreover, since the heat moving direction is determined in one direction, the effect of heat dissipation can be enhanced.

<Third Embodiment>
Next, a configuration example of a radiation imaging apparatus 1c according to the third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a diagram schematically illustrating a configuration example of a radiation imaging apparatus 1c according to the third embodiment, in which (a) is an exploded perspective view and (b) is a cross-sectional view. The radiation imaging apparatus 1c according to the third embodiment is different from the first embodiment or the second embodiment in the configuration having the shield member 17. Other than that, a configuration common to the first embodiment and the second embodiment can be applied. In FIG. 4, a configuration in which the configuration of the heat dissipation member 14 c is common to the first embodiment is shown as an example, but may be common to the second embodiment.

  As shown in FIG. 4, the radiation imaging apparatus 1 c includes a shield member 17 disposed between the incident side housing 15 and the radiation detector 11. The shield member 17 is formed of a highly conductive material, for example, a conductive alloy such as copper or aluminum. Further, the shield member 17 has a substantially quadrilateral frame shape in which an opening (referred to as a shield opening 171 for convenience of explanation) is provided on the inner peripheral side in a plan view, and has a seam. It has a continuous structure that does not. The inner dimension of the shield opening 171 in the radiation incident direction is larger than the outer dimension of the effective imaging region 101 of the radiation detector 11. The shield member 17 does not overlap the effective imaging area 101 of the radiation detector 11 in a state of being arranged on the incident surface side of the radiation detector 11 in a plan view, but is an area outside the effective imaging area 101 (a so-called frame). It is arranged so as to overlap the area.

  Such a shield member 17 shields against radiation noise by causing a current due to induced electromotive force to flow along the four sides of the shield member 17 when noise is incident from the same direction as the radiation emitted from the radiation source. It has a function. Further, the shield member 17 is provided with a shield opening 171 and does not overlap the effective imaging region 101 of the radiation detector 11 when viewed in the incident direction of radiation. For this reason, radiation incident on the effective imaging region 101 is not shielded. Further, as shown in FIG. 4B, if the radiation detector 11 is arranged on the incident side instead of being located on the inner peripheral side of the opening 143 of the heat radiating member 14c, the radiation noise from the incident side is The shield member 17 shields, and the radiation noise from the back side is shielded by the heat radiating member 14c. That is, in 3rd Embodiment, the structure arrange | positioned so that the radiation detector 11 may be inserted in the opening part 143 of the thermal radiation member 14c may not be sufficient. In this case, the radiation detector 11 should just be the structure arrange | positioned between the heat radiating member 14c and the shield member 17. FIG.

  As mentioned above, although each embodiment of this invention was described in detail with reference to drawings, the said embodiment only showed the specific example in implementation of this invention. The technical scope of the present invention is not limited to the above embodiments. The present invention can be variously modified without departing from the spirit thereof, and these are also included in the technical scope of the present invention.

  For example, in each of the above-described embodiments, a medical radiographic apparatus has been described as an example. However, the present invention can be applied to any radiographic apparatus having a heat source such as a circuit board or a battery. For example, the present invention can be applied to radiation imaging apparatuses used in various fields such as a nondestructive inspection apparatus and an analysis apparatus.

  The present invention is a technique suitable for a radiation imaging apparatus. According to the present invention, it is possible to reduce the influence of external radiation noise and to radiate the heat generated by the heat source without increasing the size and weight of the radiation imaging apparatus.

1a, 1b, 1c: Radiation imaging apparatus, 11: Radiation detector, 101: Effective imaging area, 12: Circuit board, 121: First circuit board, 122: Second circuit board, 123: Third circuit board , 13: battery, 14a, 14b, 14c: heat radiating member, 140: outer periphery, 141: extension, 143: opening, 144: heat pipe, 145: heat transfer, 146: heat radiating, 147: joint , 15: incident side case, 16: back side case, 161: case opening, 17: shield member, 171: shield opening

Claims (7)

A radiation imaging apparatus having a radiation detector provided with an effective imaging region for converting incident radiation into an electrical signal, and a heat source that generates heat,
A heat dissipating member that contacts the heat source and dissipates heat from the heat source to the outside;
The heat radiation member is provided with an outer peripheral portion that surrounds the outside of the effective imaging region in a direction perpendicular to the surface direction of the effective imaging region, and at least the outer peripheral portion has conductivity. Shooting device. The heat radiating member has a loop-like configuration in which an opening is provided on the inner peripheral side of the outer peripheral portion,
The radiation imaging apparatus according to claim 1, wherein the radiation detector is disposed on an inner peripheral side of the opening. The heat dissipating member includes a heat dissipating part that dissipates heat to the outside, and a heat transfer part that moves heat generated by the heat source to the heat dissipating part.
The radiation imaging apparatus according to claim 2, wherein the heat source is in contact with the heat transfer unit. The heat transfer part has an extending part extending from the outer peripheral part to the inner peripheral side of the opening part,
The radiation imaging apparatus according to claim 3, wherein the heat source is in contact with the extending portion. The heat transfer part is included in at least a part of the outer peripheral part,
The heat source is disposed along the heat transfer portion included in the outer peripheral portion in a direction perpendicular to the surface direction of the effective imaging region, and is in contact with the heat transfer portion included in the outer peripheral portion. The radiation imaging apparatus according to claim 3. The heat source is disposed on a side opposite to the side on which the radiation of the radiation detector is incident,
On the radiation incident side of the radiation detector, a shielding member for shielding incident radiation noise is overlapped with an area outside the effective imaging area in a direction perpendicular to the surface direction of the effective imaging area. The radiation imaging apparatus according to claim 1, wherein the radiation imaging apparatus is arranged.   The radiation imaging apparatus according to claim 1, wherein the heat source is at least one of a circuit board and a battery.

Images