# US 9,433,391 B2 · Scintillator and radiation detection device

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- Number: US 9,433,391 B2
- Document ID: US9433391B2
- Status: Granted
- Kind: B2
- Application number: 14/847,276
- Filed: 2015-09-08
- Published: 2016-03-17
- Granted: 2016-09-06
- Earliest claimed: 2014-09-17
- Assignees: Kabushiki Kaisha Toshiba
- Applicants: Kabushiki Kaisha Toshiba
- Inventors: Kazunori Miyazaki; Rei Hasegawa
- Web page: https://patentgrep.com/patent/US9433391B2

## CPC

- A61B 6/4241: {using energy resolving detectors, e.g. photon counting}
- A61B 6/032: {Transmission computed tomography [CT]}
- A61B 6/482: {involving multiple energy imaging}
- G01T 1/2002: {Optical details, e.g. reflecting or diffusing layers}
- G01T 1/2006: {using a combination of a scintillator and photodetector which measures the means radiation intensity}
- G01T 1/20187: {Position of the scintillator with respect to the photodiode, e.g. photodiode surrounding the crystal, the crystal surrounding the photodiode, shape or size of the scintillator}
- G01T 1/248: {Silicon photomultipliers [SiPM], e.g. an avalanche photodiode [APD] array on a common Si substrate}
- H04N 23/30: for generating image signals from X-rays
- A61B 6/5205: {involving processing of raw data to produce diagnostic data}
- H04N 5/32: Transforming X-rays (cameras or camera modules for generating image signals from X-rays H04N23/30; circuitry of SSIS for transforming X-rays into image signals H04N25/30)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G01T: MEASUREMENT OF NUCLEAR OR X-RADIATION (radiation analysis of materials, mass spectrometry G01N23/00; tubes for determining the presence, intensity, density or energy of radiation or particles H01J47/00)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

According to an embodiment, a scintillator includes a scintillator layer and a radiation absorption layer. Scintillation photons corresponding to incident radiation are generated in the scintillator layer. The radiation absorption layer is laminated to the scintillator layer. The radiation absorption layer faces a detecting surface of a detector that detects the scintillation photons.

## Claims

### Claim 1

A scintillator comprising:
a first scintillator layer in which first scintillation photons having a first wavelength with respect to incident radiation are generated;
a second scintillator layer in which second scintillation photons having a second wavelength different from the first wavelength with respect to the incident radiation are generated, the second scintillator layer being laminated to the first scintillator layer; and
a filter configured to absorb or reflect the first scintillation photons and pass the second scintillation photons through so that the second scintillation photons enter a detecting surface of a detector that detects scintillation photons, the filter being disposed between a scintillation-photon emission surface of the first scintillator layer and the detecting surface of the detector.

### Claim 2 (depends on 1)

A radiation detection device comprising:
the scintillator according to claim 1; and
the detector configured to receive the scintillation photons from the scintillator.