Development of a mercuric iodide detector array for in-vivo x-ray imaging
- Xsirius, Inc., Camarillo, CA (United States)
- UCLA School of Medicine, Los Angeles, CA (United States)
A nineteen element mercuric iodide (HgI{sub 2}) detector array has been developed in order to investigate the potential of using this technology for in-vivo x-ray and gamma-ray imaging. A prototype cross-grid detector array was constructed with hexagonal pixels of 1.9 mm diameter (active area = 3.28 mm{sup 2}) and 0.2 mm thick septa. The overall detector active area is roughly 65 mm{sup 2}. A detector thickness of 1.2 mm was used to achieve about 100% efficiency at 60 keV and 67% efficiency at 140 keV The detector fabrication, geometry and structure were optimized for charge collection and to minimize crosstalk between elements. A section of a standard high resolution cast-lead gamma-camera collimator was incorporated into the detector to provide collimation matching the discrete pixel geometry. Measurements of spectral and spatial performance of the array were made using 241-Am and 99m-Tc sources. These measurements were compared with similar measurements made using an optimized single HgI{sub 2} x-ray detector with active area of about 3 mm{sup 2} and thickness of 500 {mu}m.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 369863
- Report Number(s):
- CONF-9408178--
- Journal Information:
- Advances in X-Ray Analysis, Journal Name: Advances in X-Ray Analysis Vol. 38; ISSN AXRAAA; ISSN 0376-0308
- Country of Publication:
- United States
- Language:
- English
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