Localization of a radioactive source
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United States of America Patent
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Jun 12, 2012
Grant Date -
Aug 18, 2011
app pub date -
Apr 21, 2011
filing date -
Aug 12, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An angle-responsive sensor, comprising: a radiation detector adapted to detect ionizing radiation; at least one collimator arranged to block radiation from reaching the detector in a manner dependent on a relative orientation of a radiation source, the detector and the collimator, the detector and the collimator defining an aim for the sensor; and circuitry coupled to the detector and which generates an output signal which varies as a function of the relative orientation, wherein the detector and the collimator are arranged to have a working volume of at least 10 cm in depth and having an angular width, such that the slope of the signal as a function of angle varies by less than a factor of 2 over the working volume.
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