G - Physics – 03 – B
Patent
G - Physics
03
B
G03B 42/00 (2006.01) A61B 6/00 (2006.01) G01T 1/164 (2006.01) G01T 1/29 (2006.01) G01T 1/36 (2006.01)
Patent
CA 2155090
A system for recording fewer of the events that are caused by unwanted photons with greater stability. The system locally determines the energy spectrum and fits for each pixel of the image the determined energy spectrum with a modified trial function composed of: a photopeak component of known energy shape, Compton scatter components having theoretically derived energy shapes and, when applicable, also measured or calculated energy spectra of other unwanted photons. The modified trial function also takes into consideration unknown local deviations in the outputs of electronic components. The amplitude of the photopeak distribution resulting from the fit is used to obtain the local content of wanted interactions in the image. This enables removal of Compton contamination and also the contamination caused by interaction of the gamma photons with lead components.
Berlad Gideon
Maor Dov
Natanzon Alex
Shrem Yigal
Soil Adrian
Ge Medical Systems Israel Ltd.
Smart & Biggar
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