Imaging device and method
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United States of America Patent
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Oct 10, 2017
Grant Date -
Sep 14, 2017
app pub date -
Aug 28, 2015
filing date -
Sep 5, 2014
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Abstract
Focusing on a gamma ray detection phenomenon (event) in which a gamma ray from a gamma ray source is Compton scattered at a first-stage detector, the gamma ray is photoelectrically absorbed at a second-stage detector, the spatial distribution of the gamma ray source is imaged within a predetermined image space on the basis of measurement data for the interaction of the detectors and gamma rays. At this time, a probability parameter (vij) indicating the probability that Compton-scattered gamma ray arrived from within the image space and a detection sensitivity parameter (sij) indicating gamma ray detection sensitivity are set for each event and each pixel on the basis of the measurement data for each event, and these parameters are used to determine the pixel values (λj) for each pixel.
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