High resolution 3-D position sensitive detector for gamma rays
US6770884B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 11, 2002 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Aug 2, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T1/2978
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method and apparatus for determining the position of a gamma ray interaction are disclosed. A medium that emits light in response to an interaction between a gamma ray and the medium is provided. A plurality of photodetectors is used to detect the light and determine a first three-dimensional position of the interaction. A field is produced in the medium that dire ionization electrons resulting from the interaction to a collector. A portion of a shutter system that corresponds to the interaction is opened. The shutter selectively blocks and permits the passage of the ionization electrons to the collector. A second three-dimensional position of the interaction is determined by localizing a two-dimensional position of the interaction in the collector and determining a third dimension based on a time of arrival of the ionization electrons relative to when the light is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.