Radiation detector, radiation detector manufacturing method, and scintillator panel unit

Patent metadata

Field	Value
Publication number	US-12386085-B2
Application number	US-202118265720-A
Country	US
Kind code	B2
Filing date	Nov 8, 2021
Priority date	Dec 23, 2020
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

A radiation detector includes a sensor panel having a light receiving surface, a first scintillator panel and a second scintillator panel disposed on the light receiving surface in a state of being adjacent to each other along the light receiving surface, and a moisture-proof layer. The first scintillator panel has a first substrate and a first scintillator layer including a plurality of columnar crystals. The second scintillator panel has a second substrate and a second scintillator layer including a plurality of columnar crystals. The first scintillator layer reaches at least a first portion of the first substrate. The second scintillator layer reaches at least a second portion of the second substrate. The moisture-proof layer is provided continuous over the first scintillator panel and the second scintillator panel.

First claim

The invention claimed is:

1. A radiation detector comprising:
a sensor panel having a light receiving surface;
a first scintillator panel and a second scintillator panel disposed on the light receiving surface in a state of being adjacent to each other along the light receiving surface; and
a moisture-proof layer disposed on the first scintillator panel and the second scintillator panel on a side opposite to the sensor panel, wherein
the first scintillator panel has a first substrate and a first scintillator layer including a plurality of columnar crystals formed on the first substrate,
the second scintillator panel has a second substrate and a second scintillator layer including a plurality of columnar crystals formed on the second substrate,
the first scintillator panel is disposed on the light receiving surface in a state where the first scintillator layer is positioned on the light receiving surface side with respect to the first substrate,
the second scintillator panel is disposed on the light receiving surface in a state where the second scintillator layer is positioned on the light receiving surface side with respect to the second substrate,
an outer edge of the first substrate when viewed from the first scintillator layer side includes a first portion extending along the second scintillator panel, and the first scintillator layer reaches at least the first portion,
an outer edge of the second substrate when viewed from the second scintillator layer side includes a second portion extending along the first scintillator panel, and the second scintillator layer reaches at least the second portion, and
the moisture-proof layer is provided continuous over the first scintillator panel and the second scintillator panel.

2. The radiation detector according to claim 1 , wherein the first substrate and the second substrate each have flexibility.

3. The radiation detector according to claim 1 , further comprising an adhesive layer disposed between the light receiving surface and the first scintillator panel and between the light receiving surface and the second scintillator panel, wherein
each of the first scintillator panel and the second scintillator panel is attached to the light receiving surface by the adhesive layer.

4. The radiation detector according to claim 3 , wherein the adhesive layer contains a pressure-sensitive adhesive or an adhesive.

5. The radiation detector according to claim 1 , wherein the first scintillator panel further has a first protective layer covering the first substrate and the first scintillator layer, and
the second scintillator panel further has a second protective layer covering the second substrate and the second scintillator layer.

6. The radiation detector according to claim 1 , further comprising a granular phosphor disposed between the first scintillator panel and the second scintillator panel.

7. The radiation detector according to claim 1 , wherein the moisture-proof layer has
a main body layer having flexibility, and
an inorganic layer disposed on the main body layer, and
the moisture-proof layer is disposed on the first scintillator panel and the second scintillator panel in a state where the inorganic layer is positioned on the side of the first scintillator panel and the second scintillator panel with respect to the main body layer.

8. The radiation detector according to claim 1 , further comprising a sealing member, wherein
an outer edge of the moisture-proof layer reaches a surface of the sensor panel around the light receiving surface, and
the sealing member seals the outer edge of the moisture-proof layer in the surface of the sensor panel in a state where a region defined by the sensor panel and the moisture-proof layer is decompressed.

9. A method for manufacturing the radiation detector according to claim 1 , the method comprising:
a step of preparing the sensor panel;
a step of preparing the first scintillator panel and the second scintillator panel;
a step of disposing each of the first scintillator panel and the second scintillator panel on the light receiving surface; and
a step of disposing a moisture-proof layer on the first scintillator panel and the second scintillator panel on a side opposite to the sensor panel, wherein
in the step of disposing a moisture-proof layer, the moisture-proof layer is provided continuous over the first scintillator panel and the second scintillator panel.

10. The method for manufacturing the radiation detector according to claim 9 , wherein the step of disposing each of the first scintillator panel and the second scintillator panel is performed before the step of disposing a moisture-proof layer.

11. The method for manufacturing the radiation detector according to claim 9 , wherein the step of disposing a moisture-proof layer is performed before the step of disposing each of the first scintillator panel and the second scintillator panel.

12. A scintillator panel unit comprising:
a moisture-proof layer; and
a first scintillator panel and a second scintillator panel disposed on the moisture-proof layer in a state of being adjacent to each other along the moisture-proof layer, wherein
the first scintillator panel has a first substrate and a first scintillator layer including a plurality of columnar crystals formed on the first substrate,
the second scintillator panel has a second substrate and a second scintillator layer including a plurality of columnar crystals formed on the second substrate,
the first scintillator panel is disposed on the moisture-proof layer in a state where the first substrate is positioned on the moisture-proof layer side with respect to the first scintillator layer,
the second scintillator panel is disposed on the moisture-proof layer in a state where the second substrate is positioned on the moisture-proof layer side with respect to the second scintillator layer,
an outer edge of the first substrate when viewed from the first scintillator layer side includes a first portion extending along the second scintillator panel, and the first scintillator layer reaches at least the first portion,
an outer edge of the second substrate when viewed from the second scintillator layer side includes a second portion extending along the first scintillator panel, and the second scintillator layer reaches at least the second portion, and
the moisture-proof layer is provided continuous over the first scintillator panel and the second scintillator panel.

13. The scintillator panel unit according to claim 12 , wherein the first scintillator panel further has a first protective layer covering the first substrate and the first scintillator layer, and
the second scintillator panel further has a second protective layer covering the second substrate and the second scintillator layer.

Assignees

• Hamamatsu Photonics Kk

Inventors

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

Classifications

• G21K2004/06

  with a phosphor layer · CPC title

• G01T1/2014

  Reading out of stimulable sheets, e.g. latent image · CPC title

• G01T1/20189

  Damping or insulation against damage, e.g. caused by heat or pressure · CPC title

• G01T1/202 Primary

  the detector being a crystal · CPC title

• G01T1/20182 Primary

  Modular detectors, e.g. tiled scintillators or tiled photodiodes (stacked detectors G01T1/20181) · CPC title