# US 7,745,795 B2 · Radiation detector, radiation detector element, and radiation imaging apparatus

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- Number: US 7,745,795 B2
- Document ID: US7745795B2
- Status: Granted
- Kind: B2
- Application number: 12/045,934
- Filed: 2008-03-11
- Published: 2008-11-20
- Granted: 2010-06-29
- Earliest claimed: 2002-10-07
- Assignees: Hitachi, Ltd.
- Inventors: Katsutoshi Tsuchiya; Hiroshi Kitaguchi; Kazuma Yokoi; Kikuo Umegaki; Kensuke Amemiya; Yuuichirou Ueno; Norihito Yanagita; Shinichi Kojima
- Web page: https://patentgrep.com/patent/US7745795B2

## CPC

- G01T 1/2928: {using solid state detectors}
- 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

In a gamma camera, a plurality of radiation detector elements having a rod-shaped first electrode, a semiconductor device surrounds the first electrode to contact with it for entering a radiation, and a second electrode provided for the side surface of the semiconductor device are detachably attached to a holding member. The holding member has a first electrode contact portion contacted with the first electrode and a second electrode contact portion contacted with the second electrode. A collimator in which a plurality of radiation paths provided corresponding to the plurality of radiation detector elements are formed is arranged on the radiation entering side of the plurality of radiation detector elements. A γ-ray detection signal outputted from the first electrode contact portion is sent to a signal processing integrated circuit. A high voltage is applied to the second electrode via the second electrode contact portion.

## Claims

### Claim 1

A radiation detector comprising:
an element holding member including a plurality of radiation detector elements, and wherein each radiation detector element has a first electrode and a second electrode, and wherein electric potentials of the first electrodes are different than respective electric potentials of the second electrodes, and wherein said element holding member has a plurality of first signal line connectors outputting signals from the first electrodes, and at least one second signal line connector outputting a signal from the second electrodes; and
an integrated circuit holding member to which an integrated circuit for processing radiation detection signals outputted from the radiation detector elements is provided, and including a plurality of third signal line connectors connected to the first signal line connectors, and at least a fourth signal line connector connected to the second signal line connector; and
wherein the first signal line connectors, the second signal line connector, the third signal line connectors, and the fourth signal line connector are detachably connected on a same surface, and the element holding member and the integrated circuit holding member are connected to each other.

### Claim 2 (depends on 1)

A radiation detector according to claim 1, wherein the first electrodes are signal electrodes for outputting signals representing detection of radiation, and the second electrodes include an electrical potential supplying electrode for supplying electrical potential to at least one of the radiation detector elements.

### Claim 3 (depends on 2)

A radiation detector according to claim 2, wherein the electrical potential supplying electrode is a common electrode for supplying electrical potential commonly to the plurality of radiation detector elements.

### Claim 4 (depends on 1)

A radiation detector according to claim 1, wherein at least one of the first electrodes is disposed inside a respective one of the radiation detector elements, and wherein at least one of the second electrodes is disposed outside the respective one of the detector elements.

### Claim 5 (depends on 1)

A radiation detector according to claim 1, wherein the second signal line connector is disposed at an end of the element holding member, and the fourth signal line connector is disposed at an end of the integrated circuit holding member.

### Claim 6 (depends on 1)

A radiation detector according to claim 1, wherein at least one radiation detector element is a semiconductor element.