Development of a small field of view scintimammography camera based on a YAP crystal array and a position sensitive PMT
- and others
We have developed a gamma imaging detector based on a 10cm by 10cm YAP crystal array made of 3 x 3 x 10 mm{sup 3} crystals-pixels and a 5 inch diameter Hamamatsu R3292 position sensitive photomultiplier tube (PSPMT). After the PSPMT`s readout was optimized a resolution of about {approximately}3mm @ 140 keV was obtained using only fourteen (7x,7y) anode wire sections in lieu of the standard 28 x 28 individual crossed-wires. Because individual crystals are well-separated and identified, a simple but effective position distortion correction is possible based on a flood measurement. Efficient scatter rejection is expected by placing individual energy windows on scintillation signals coming from each crystal-pixel. Measurements were made with thyroid phantoms and compressed as well as non-compressed breast phantoms with simulated lesions. The phantoms contained appropriate concentrations of {sup 99m}Tc emitting 140 keV gamma radiation. The detector combines good performance with small size and economical makeup. After final phantom tests we are planning to use it in clinical trials as a small field-of-view scintimammography camera.
- OSTI ID:
- 513188
- Report Number(s):
- CONF-961123--
- Country of Publication:
- United States
- Language:
- English
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