Radiation imaging apparatus

• US 10,914,845 B2
• Filed: 04/02/2019
• Issued: 02/09/2021
• Est. Priority Date: 04/09/2018
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Sakuragi, Shichihei, Suzuki, Masataka, Kato, Katsushi, Kondo, Hiroto
• Primary Examiner(s): Porta, David P
• Assistant Examiner(s): Sahu, Meenakshi S
• Application Number:
  US16/373,251
• Publication Number:
  US 20190310383A1
• Time in Patent Office: 679 Days
• CPC Class Codes: A61B 6/4216 using storage phosphor screens
• CPC Class Codes: A61B 6/4225 using image intensifiers
• CPC Class Codes: A61B 6/4233 using matrix detectors
• CPC Class Codes: A61B 6/4283 characterised by a detector unit being housed in a cassette
• CPC Class Codes: A61B 6/4405 the apparatus being movable or portable, e.g. handheld or mounted on a trolley
• CPC Class Codes: A61B 6/56 Details of data transmission or power supply, e.g. use of slip rings
• CPC Class Codes: G01T 1/175 Power supply circuits
• CPC Class Codes: H02J 2310/23 The load being a medical device, a medical implant, or a life supporting device
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment

Abstract

A radiation imaging apparatus for supplying power in a non-contact manner includes a power reception coil disposed inside a housing together with a radiation detector and a detector contact conductive member, and configured to receive electric energy to be supplied to the radiation detector in a non-contact manner from a power feeding coil disposed outside the housing. The power reception coil is disposed in a second range including a first range in which the detector contact conductive member is formed in the normal direction (y direction) to an incident surface of the radiation detector where the radiation is incident so that an orientation of the center of a generated magnetic flux coincides with an in-plane direction (x direction) of the incident surface and coincides with a direction toward the radiation detector.

Claims

1. A radiation imaging apparatus comprising:

a housing;

a radiation detector disposed inside the housing and configured to detect incident radiation and convert the radiation into an image signal;

a conductive member disposed inside the housing and in contact with the radiation detector; and

a power reception coil disposed inside the housing and configured to receive electric energy to be supplied to the radiation detector in a non-contact manner from a power feeding coil disposed outside the housing,

wherein, the power reception coil is disposed in a second range including a first range in which the conductive member is formed in the normal direction to an incident surface of the radiation detector where the radiation is incident.

2. The radiation imaging apparatus according to claim 1, wherein the conductive member comprises:

an incident surface side conductive member disposed in contact with the incident surface of the radiation detector; and

a rear side conductive member disposed in contact with a rear surface of the radiation detector facing the incident surface.

3. The radiation imaging apparatus according to claim 2,

wherein the radiation detector comprises:

a phosphor disposed on the side of the incident surface, and configured to convert the radiation into light; and

an optical detection unit disposed on the side of the rear surface, and configured to detect the light and convert the light into an image signal,

wherein the incident surface side conductive member is disposed in contact with the phosphor so as to include the phosphor, and

wherein the rear side conductive member is disposed in contact with the optical detection unit.

4. The radiation imaging apparatus according to claim 1, wherein the radiation detector is included in the second range.

5. The radiation imaging apparatus according to claim 1, wherein the second range includes a battery substrate connected with the power reception coil via a wire.

6. The radiation imaging apparatus according to claim 1,

wherein the housing comprises an incident surface where radiation is incident, a rear surface facing the incident surface, and a side surface connecting the incident and the rear surfaces, and

wherein the power reception coil is disposed inside the side surface, and is disposed at a position including the center of the side surface in the longitudinal direction.

7. The radiation imaging apparatus according to claim 6, wherein the power reception coil is disposed at a position including the center of the side surface in the widthwise direction.

12. The radiation imaging apparatus according to claim 1,

wherein, in the housing, the power reception coil is disposed in a surface parallel to the normal direction, and

wherein a slope inclined with respect to the normal direction is connected to an area of the parallel surface where the power reception coil is not disposed.

13. The radiation imaging apparatus according to claim 1, wherein an orientation of the center of a generated magnetic flux coincides with an in-plane direction of the incident surface and coincides with a direction toward the radiation detector.

8. A radiation imaging apparatus comprising:

a housing;

a radiation detector disposed inside the housing and configured to detect incident radiation and convert the radiation into an image signal;

a first conductive member disposed inside the housing and in contact with the radiation detector;

a second conductive member not in contact with the radiation detector and the first conductive member, disposed inside the housing at a position different from the position of the first conductive member in the normal direction to the incident surface of the radiation detector where the radiation is incident; and

a power reception coil disposed inside the housing,

wherein the power reception coil receives electric energy to be supplied to the radiation detector in a non-contact manner from a power feeding coil disposed outside the housing, and

wherein the power reception coil is disposed between a first position where the first conductive member is disposed and a second position where the second conductive member is disposed in the normal direction so that an orientation of the center of a generated magnetic flux coincides with an in-plane direction of the incident surface.

9. The radiation imaging apparatus according to claim 8, wherein, in a case where the first and the second conductive members are different in conductivity, the power reception coil is disposed at a position closer to a position of the conductive member having higher conductivity than to a position of the conductive member having lower conductivity in the normal direction among the first and the second conductive members.

10. The radiation imaging apparatus according to claim 8, wherein, in the normal direction, a position of the center of the power reception coil approximately coincides with a position of the center between the first and the second positions.

11. The radiation imaging apparatus according to claim 8,

wherein the housing comprises an incident surface where radiation is incident, a rear surface facing the incident surface, and a side surface connecting the incident and the rear surfaces, and

wherein the power reception coil is disposed inside a first side surface, at a position including the center of the first side surface in the longitudinal direction, in a manner that an orientation of the center of a magnetic flux coincides with a direction toward a second side surface facing the first side surface.