G - Physics – 01 – T
Patent
G - Physics
01
T
G01T 1/24 (2006.01) A61B 6/00 (2006.01) H05G 1/64 (2006.01)
Patent
CA 2536724
A flat panel x-ray imager exhibiting reduced ghosting effects and overvoltage protection by appropriate leakage current characteristics of the thin-film transistor array. A top electrode of a suitable material is directly on and in physical and electrical contact with an amorphous selenium-based charge generator layer, thereby reducing ghosting. The thin-film transistors have leakage current that rises relatively slowly with voltage across the transistor within a range that matches exposure through an object being imaged but rises at a sufficiently higher rate within a higher range to provide protection even when a corresponding region of the charge generator layer receives greater amounts of x-rays.
Cheng Lawrence
Jing Zhenxue
Hologic Inc.
Osler Hoskin & Harcourt Llp
LandOfFree
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