Abstract
Results are presented from prototype MWPC gas-solid hybrid imaging detectors designed for applications in nuclear medicine. Using a multi-section chamber with foil converter cathodes and a delay line readout technique, we have made a 99mTc imaging detector with a spatial resolution of 5 mm fwhm and a projected quantum efficiency of 15% for a full scale device. With lead foil cathodes the detectors design yields similar spatial resolution and quantum efficiency when positron annihilation gammas are detected. Images of positron emitters ( 22Na and 68Ga) are presented.
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