X-ray or gamma ray systems or devices – Specific application – Absorption
Patent
1990-07-02
1992-05-26
Church, Craig E.
X-ray or gamma ray systems or devices
Specific application
Absorption
378 19, 378 99, A61N 510
Patent
active
051174456
ABSTRACT:
The detector of the present invention is suitable for use in a radiation therapy simulator machine. The detector comprises an X-ray image intensifier tube to convert X-rays into photons, a linear array of photodiodes to convert the photons to electrical signals, optical means for coupling the photons to the linear array of photodiodes, and electronic signal processing means for conditioning the signals from the photodiodes. The conditioning includes the use of low noise, phaselocked sampling electronics, implementation of a dual sampling technique for increasing dynamic range, implementation of a linearizing technique for increasing the accuracy of the measurements, and implementation of techniques for adjusting the measurements for point spread and background noise effects.
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Pavkovich John M.
Seppi Edward J.
Shapiro Edward G.
Church Craig E.
Sgarbossa Peter J.
Varian Associates Inc.
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