Radiation detector and production method for radiation detector

Patent metadata

Field	Value
Publication number	US-12092776-B2
Application number	US-202017766564-A
Country	US
Kind code	B2
Filing date	Jul 9, 2020
Priority date	Oct 24, 2019
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

A radiation detector includes: a sensor panel; a scintillator panel; and a resin frame provided across the sensor panel and the scintillator panel, in which the sensor panel has a mounting surface where the scintillator panel is mounted, the scintillator panel includes a support body having a first surface, a second surface on a side opposite to the first surface, and a first side surface connecting the first surface and the second surface to each other, and a scintillator layer formed on the first surface and containing a plurality of columnar crystals, the scintillator panel is mounted on the mounting surface such that the scintillator layer and the first surface face the mounting surface, and the scintillator layer has a second side surface extending so as to be positioned on the same plane as the first side surface.

First claim

The invention claimed is:

1. A radiation detector comprising:
a sensor panel;
a scintillator panel; and
a resin frame provided across the sensor panel and the scintillator panel, wherein
the sensor panel has a mounting surface where the scintillator panel is mounted,
the scintillator panel includes
a support body having a first surface, a second surface on a side opposite to the first surface, and a first side surface connecting the first surface and the second surface to each other, and
a scintillator layer formed on the first surface and containing a plurality of columnar crystals,
the scintillator panel is mounted on the mounting surface such that the scintillator layer and the first surface face the mounting surface,
the scintillator layer has a second side surface extending so as to be positioned on the same plane as the first side surface,
the resin frame is configured to seal the scintillator layer by extending at least from the mounting surface onto the first side surface when viewed in a first direction intersecting with the first side surface and the second side surface, and
the resin frame extends from the mounting surface to a peripheral edge portion of the second surface.

2. A radiation detector comprising:
a sensor panel;
a scintillator panel; and
a resin frame provided across the sensor panel and the scintillator panel, wherein
the sensor panel has a mounting surface where the scintillator panel is mounted,
the scintillator panel includes
a support body having a first surface, a second surface on a side opposite to the first surface, and a first side surface connecting the first surface and the second surface to each other, and
a scintillator layer formed on the first surface and containing a plurality of columnar crystals,
the scintillator panel is mounted on the mounting surface such that the scintillator layer and the first surface face the mounting surface,
the scintillator layer has a second side surface extending so as to be positioned on the same plane as the first side surface,
the resin frame is configured to seal the scintillator layer by extending at least from the mounting surface onto the first side surface when viewed in a first direction intersecting with the first side surface and the second side surface,
the support body has
a first flexible support body having the first surface and a third surface on the side opposite to the first surface,
a second flexible support body having the second surface and a fourth surface on a side opposite to the second surface, and
an inorganic layer provided between the third surface and the fourth surface, and
the resin frame is configured to seal the inorganic layer by extending at least from the mounting surface to the fourth surface when viewed in the first direction.

3. The radiation detector according to claim 2 , wherein
the resin frame includes an inner edge positioned on the second surface and an outer edge positioned outside the second surface when viewed in a second direction intersecting with the second surface, and
a distance from the inner edge of the resin frame to a peripheral edge of the second surface is twice or less a distance from the peripheral edge of the second surface to the outer edge.

4. The radiation detector according to claim 1 , wherein the resin frame includes a plurality of parts arranged along the first side surface and the second side surface and includes at least one overlapping portion where one of the parts and another of the parts overlap.

5. A radiation detector comprising:
a sensor panel;
a scintillator panel; and
a resin frame provided across the sensor panel and the scintillator panel, wherein
the sensor panel has a mounting surface where the scintillator panel is mounted,
the scintillator panel includes
a support body having a first surface, a second surface on a side opposite to the first surface, and a first side surface connecting the first surface and the second surface to each other, and
a scintillator layer formed on the first surface and containing a plurality of columnar crystals,
the scintillator panel is mounted on the mounting surface such that the scintillator layer and the first surface face the mounting surface,
the scintillator layer has a second side surface extending so as to be positioned on the same plane as the first side surface,
the resin frame is configured to seal the scintillator layer by extending at least from the mounting surface onto the first side surface when viewed in a first direction intersecting with the first side surface and the second side surface, and
a ratio of a width of the resin frame from the first side surface is 0.1 or more and 12.5 or less when a height of the resin frame from the mounting surface is 1.

6. The radiation detector according to claim 1 , comprising an adhesive layer interposed between the mounting surface and the scintillator panel and bonding the sensor panel and the scintillator panel to each other.

7. The radiation detector according to claim 1 , wherein the resin frame contains a filler material made of an inorganic material.

8. A radiation detector comprising:
a sensor panel;
a scintillator panel; and
a resin frame provided across the sensor panel and the scintillator panel, wherein
the sensor panel has a mounting surface where the scintillator panel is mounted,
the scintillator panel includes
a support body having a first surface, a second surface on a side opposite to the first surface, and a first side surface connecting the first surface and the second surface to each other, and
a scintillator layer formed on the first surface and containing a plurality of columnar crystals,
the scintillator panel is mounted on the mounting surface such that the scintillator layer and the first surface face the mounting surface,
the scintillator layer has a second side surface extending so as to be positioned on the same plane as the first side surface,
the resin frame is configured to seal the scintillator layer by extending at least from the mounting surface onto the first side surface when viewed in a first direction intersecting with the first side surface and the second side surface, and
the resin frame contains at least a pigment having reflectivity or absorbency with respect to scintillation light generated by the scintillator layer.

9. The radiation detector according to claim 1 , wherein a protective layer is formed on the mounting surface.

10. The radiation detector according to claim 1 , wherein the scintillator panel includes a protective layer formed on the first side surface and the second side surface.

11. A radiation detector manufacturing method comprising:
a first step of preparing a scintillator panel having a support body and a scintillator layer formed on the support body;
a second step of preparing a sensor panel including a photoelectric conversion element;
a third step of mounting the scintillator panel on the sensor panel such that the scintillator layer faces the sensor panel; and
a fourth step of providing a resin frame across the sensor panel and the scintillator panel after the third step, wherein
the support body has a first surface where the scintillator layer is formed, a second surface on a side opposite to the first surface, and a first side surface connecting the first surface and the second surface to each other,
the scintillator layer has a second side surface extending so as to be positioned on the same plane as the first side surface,
the sensor panel has a mounting surface where the scintillator panel is mounted, and
in the fourth step, the resin frame is formed by resin application and curing being performed with res

Assignees

• Hamamatsu Photonics Kk

Inventors

• YAMAJI Haruki
• Shirakawa Kazuhiro
• Goto Keisuke
• Hatanaka Masashi
• Sakurai Jun

Classifications

• G01T1/202

  the detector being a crystal · CPC title

• G01T1/2002 Primary

  Optical details, e.g. reflecting or diffusing layers · CPC title

• G21K4/00

  Conversion screens for the conversion of the spatial distribution of X-rays or particle radiation into visible images, e.g. fluoroscopic screens (photographic processes using X-ray intensifiers G03C5/17; discharge tubes comprising luminescent screens H01J1/62; cathode ray tubes for X-ray conversion with optical output H01J31/50) · CPC title

• G01T1/2006

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

• A61B6/4233

  using matrix detectors · CPC title