ANTI-SCATTER GRID MISPLACMENT AND FOCAL POINT SOURCE OFFSET DETERMINATION FROM SHADOW MEASUREMENTS FOR A COMPUTED TOMOGRAPHY SYSTEM
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United States of America
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Jan 9, 2025
app pub date -
Jul 7, 2023
filing date -
Jul 7, 2023
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Abstract
A method of determining a position offset includes receiving a first detection result from a first pixel of a plurality of pixels of a radiation detector, wherein the plurality of pixels are disposed on an incident side of the radiation detector on which an anti-scatter grid (ASG) is arranged, the plurality of pixels being aligned in at least a channel direction; receiving a second detection result from a second pixel of the plurality of pixels, wherein a septa of the ASG is arranged over a portion of the first pixel but is not arranged over any portion of the second pixel as viewed from the incident side of the radiation detector; estimating a positional offset of the septa of the ASG, based on the first detection result and the second detection result.
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