Construction of a Positron Emission Tomograph with 2.4 Mm Detectors

Current and Future Technological Trends in Positron Emission Tomography

“…BaF2 has a very fast component that emits light at ultraviolet frequencies and thus requires expensive quartz-glass photomultipliers. Multi-wire gas chambers [24] and plastic scintillators [25] have been investigated but both types of detectors have low density and their intrinsic efficiency for 511-ke V 'Y-rays is a major problem. New inorganic scintillators are being investigated [26] to search for the best combination of efficiency, light output, and speed.…”

An Introduction to the Physics and Instrumentation of Positron Emission Tomography

“…Plastic scintillators are attractive because they are inexpensive, easily fabricated, and fast. They are used in a novel 8-ring design with 1024 detectors per ring, each detector 2.4 mm wide to provide high spatial resolution (Mclntyre, Spross, and Wang, 1986). The number of photomultiplier tubes per ring is only 72.…”

Initial characterization of a position-sensitive photodiode/BGO detector for PET

“…In these, the observed decay time is used to determine the crystal of interaction. Other approaches use a three dimensional array of many small plastic scintillators coupled to phototubes by many long lightpipes [22], or positionsensitive mesh-dynode phototubes coupled to a bundle of long, thin BGO crystals [23]. We propose to solve the radial blurring problem by measuring the depth of interaction with the same position sensitive photodiode that performs the crystal identification.…”