Upstream direct x-ray detection
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United States of America Patent
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Dec 13, 2016
Grant Date -
Jan 9, 2014
app pub date -
Dec 21, 2011
filing date -
Dec 22, 2010
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Abstract
A radiation beam, for example a therapeutic radiation beam such as an IMRT or VMAT X-ray beam is monitored using a Monolithic Active Pixel Sensor (MAPS) detector. Photons of the radiation beam can interact with the MAPS detector, and the radiation beam configuration can be estimated from the determined positions of the interactions. The detector is made sufficiently thin that it interacts only very weakly with the X-ray photons. For example, less than 1 in 103 of the X-ray photons might interact with the detector. Hence, the disturbance to the X-ray beam is negligible.
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