Radiation detector and radiation detection apparatus

Patent metadata

Field	Value
Publication number	US-2018136342-A1
Application number	US-201715809435-A
Country	US
Kind code	A1
Filing date	Nov 10, 2017
Priority date	Nov 16, 2016
Publication date	May 17, 2018
Grant date	—

Abstract

A radiation detector includes: a wavelength conversion member that includes a fluorescent layer that emits fluorescent light when radiation enters this layer; an image sensor that converts the fluorescent light emitted from the fluorescent layer into an electric signal; and a wiring board where the image sensor is provided. The image sensor is provided on the surface on the lower side of the wiring board along one long side of the wiring board. One part of the wavelength conversion member is provided to be overlapped on the image sensor while the other part extends from the one long side of the wiring board so as not to be overlapped on the image sensor and the wiring board when viewed from radiation incident direction. The wiring board is disposed inclined so that the side where the wavelength conversion member extends can be disposed upward.

First claim

What is claimed is:

1 . A radiation detector, comprising:
a wavelength conversion part that includes a fluorescent layer that emits fluorescent light when radiation enters the fluorescent layer; a photoelectric conversion part that converts the fluorescent light emitted from the fluorescent layer into an electric signal; and a wiring board where the photoelectric conversion part is provided, wherein the wavelength conversion part is provided on a surface on a side opposite to a side where the wiring board of the wavelength conversion part is provided, and is provided to include a portion overlapped on the photoelectric conversion part and a portion not overlapped on the photoelectric conversion part when viewed from a radiation incident direction.

2 . The radiation detector according to claim 1 ,
wherein the photoelectric conversion part is provided on a surface of the wiring board opposite to a surface on which the radiation is incident.

3 . The radiation detector according to claim 1 ,
wherein the wavelength conversion part includes a radiation incident surface on which the radiation is incident, and the radiation incident surface is disposed inclined from the radiation incident direction.

4 . The radiation detector according to claim 1 ,
wherein the photoelectric conversion part is linearly disposed.

5 . The radiation detector according to claim 1 ,
wherein the photoelectric conversion part is disposed at an end of the wiring board.

6 . The radiation detector according to claim 1 ,
wherein the wiring board has an elongated shape, and the photoelectric conversion part is disposed along a longitudinal direction of the wiring board.

7 . The radiation detector according to claim 1 ,
wherein the wavelength conversion part is disposed to include a portion that is not overlapped on the wiring board when viewed from the radiation incident direction.

8 . The radiation detector according to claim 1 , further comprising
a blocking member that blocks the radiation, wherein the blocking member is disposed on a side of the photoelectric conversion part on which the radiation is incident, so as to be overlapped on the photoelectric conversion part when viewed from the radiation incident direction, and includes a part that is overlapped on the photoelectric conversion part of the wavelength conversion part and a part that is not overlapped on the photoelectric conversion part.

9 . The radiation detector according to claim 8 ,
wherein the blocking member is disposed on a side of the wiring board where the radiation is incident, so as to be overlapped on the wiring board when viewed from the radiation incident direction.

10 . A radiation detection apparatus, comprising:
a radiation source that generates radiation; and the radiation detector according to claim 1 .

Assignees

• Canon Components Kk

Inventors

• Nakamura Takehiro
• Yasuhara Tadashi
• Fujino Ryoichi

Classifications

• G01T1/2006 Primary

  using a combination of a scintillator and photodetector which measures the means radiation intensity · CPC title

• G01T1/20 Primary

  with scintillation detectors · CPC title

• G01T1/2012

  using stimulable phosphors, e.g. stimulable phosphor sheets · CPC title