X-ray detector with photo-gates and dose control
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United States of America Patent
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Mar 18, 2008
Grant Date -
Jul 12, 2007
app pub date -
Feb 1, 2005
filing date -
Feb 11, 2004
priority date (Note) -
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Abstract
The invention relates to a radiation detector apparatus (10) with an array (12) of detector pixels. Each pixel (20) of the detector comprises a photogate electrode (21) under which electrical charges produced by incident radiation (v, X) are collected. The change of these charges gives rise to displacement currents in photogate lines (32) connected to the photogate electrodes (21) which may be monitored by current sensors (40). Thus the charges collected by all photogate electrodes (21) connected to a photogate line (32) can be measured during an ongoing exposure, allowing for advanced dose control methods of the illumination.
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