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US 8,076,645 B2Granted
Compton imaging camera
AssigneeRiken
InventorsShinji Motomura, Shuichi Enomoto
Life of this patent
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Abstract
A gamma ray detector is provided that increases a detectable energy range. A position-sensitive gamma ray detecting element for low energy gamma rays 101 that can detect an interaction position and energy of a gamma ray is disposed in front of a pair of position-sensitive gamma ray detecting elements for high energy gamma rays 102 and 103 that can detect an interaction position and energy of a gamma ray.
Claims3
A Compton imaging camera comprising a gamma ray detector, wherein:
- the gamma ray detector comprises a structure in which a first-stage detecting element, a second-stage detecting element, and a third-stage detecting element are arrayed in order from a side on which a gamma ray is incident,
- the first-stage detecting element is a position-sensitive gamma ray detecting element for low-energy gamma rays, comprises only one planar silicon crystal as a gamma ray detecting crystal, and is capable of detecting an interaction position and energy of a gamma ray,
- each of the second-stage detecting element and the third-stage detecting element is a position-sensitive gamma ray detecting element for high-energy gamma rays, comprises only one planar germanium crystal as a gamma ray detecting crystal, and is capable of detecting an interaction position and energy of a gamma ray, and
- the gamma ray detector detects a gamma ray that is photoelectrically absorbed at the second-stage or third stage detecting element after being Compton scattered at the first-stage detecting element, and a gamma ray that is photoelectrically absorbed at the third-stage detecting element after being Compton scattered at the second-stage detecting element.
1 more element
Dependencies are inferred from the claim text.