Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1997-04-08
1999-09-28
Westin, Edward P.
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
2502521R, G01T 1166
Patent
active
059593008
ABSTRACT:
A method of correcting for attenuation during emission imaging in a gamma camera medical imaging system. Attenuation values are determined empirically and are stored in a look-up table in a memory that is readable by the imaging system, with each attenuation value corresponding to a given thickness value. The attenuation values are computed before imaging is performed by first measuring the number of photons which pass from a transmission source through various known depths of water or another suitable model attenuator, using the same radiation source as will be used for emission imaging. For each depth, the measurement is then used to compute the actual attenuation for a thickness of the model attenuator. The attenuation is then stored as a value in the look-up table with corresponding values of attenuator thickness and is later used to correct emission data for the effects of attenuation.
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Braymer William K.
Hines Horace H.
Liebig John R.
ADAC Laboratories
Hanig Richard
Westin Edward P.
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