# US 2013/0153775 A1 · Radiation detection apparatus

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- Number: US 2013/0153775 A1
- Document ID: US20130153775A1
- Status: Published application
- Kind: A1
- Application number: 13/690,527
- Filed: 2012-11-30
- Published: 2013-06-20
- Earliest claimed: 2011-12-16
- Assignees: Canon Kabushiki Kaisha
- Inventors: Keiichi Nomura; Satoshi Okada; Kazumi Nagano; Shoshiro Saruta; Yohei Ishida; Yoshito Sasaki; Tomoaki Ichimura; Akiya Nakayama
- Web page: https://patentgrep.com/patent/US20130153775A1

## CPC

- G01T 1/2006: {using a combination of a scintillator and photodetector which measures the means radiation intensity}
- G01T 1/2018: {Scintillation-photodiode combinations}
- 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)

## Abstract

A radiation detection apparatus comprising, a sensor panel including sensor unit disposed on a plurality of photoelectric converters on a substrate, a first scintillator layer disposed on the sensor panel, and a second scintillator layer disposed on the first scintillator layer, wherein the first scintillator layer and the second scintillator layer respectively emit light beams having different wavelengths, and the sensor unit which includes a first photoelectric converter configured to detect the light beam emitted by the first scintillator layer, a first transistor configured to output a signal from the first scintillator layer, a second photoelectric converter configured to detect the light beam emitted by the second scintillator layer, and a second transistor configured to output a signal from the second scintillator layer, and individually convert the light beams having the different wavelengths into electrical signals.

## Claims

### Claim 1

A radiation detection apparatus comprising:
a sensor panel including sensor unit disposed on a plurality of photoelectric converters on a substrate;
a first scintillator layer disposed on said sensor panel; and
a second scintillator layer disposed on said first scintillator layer,
wherein said first scintillator layer and said second scintillator layer respectively emit light beams having different wavelengths, and
said sensor unit which includes a first photoelectric converter configured to detect the light beam emitted by said first scintillator layer, a first transistor configured to output a signal from said first scintillator layer, a second photoelectric converter configured to detect the light beam emitted by said second scintillator layer, and a second transistor configured to output a signal from said second scintillator layer, and individually convert the light beams having the different wavelengths into electrical signals.

### Claim 2 (depends on 1)

The apparatus according to claim 1, wherein said first photoelectric converter and said second photoelectric converter are disposed at different depth positions from a surface of the substrate.

### Claim 3 (depends on 1)

The apparatus according to claim 1, further comprising a color filter layer disposed between said sensor panel and said first scintillator layer,
wherein said first photoelectric converter and said second photoelectric converter are disposed along an upper surface of the substrate, and
said color filter layer includes at least one of a first light absorbing member disposed on the first photoelectric converter and a second light absorbing member disposed on the second photoelectric converter.

### Claim 4 (depends on 1)

The apparatus according to claim 1, wherein said first scintillator layer contains CsI:Na, and
said second scintillator layer contains CsI:Tl.

### Claim 5 (depends on 1)

A radiographic system comprising:
a radiation detection apparatus disclosed in claim 1;
a signal processing unit configured to process a signal from said radiation detection apparatus;
a display unit configured to display a signal from said signal processing unit; and
a radiation source configured to generate the radiation.