Skip to main content Accessibility help

Development of a Mercuric Iodide Detector Array For In-Vivo X-Ray Imaging

  • Bradley E. Patt (a1), Jan S. Iwanczyk (a1), Martin P. Tornai (a2), Craig S. Levin (a2) and Edward J. Hoffman (a2)...


A nineteen element mercuric iodide (HgI2) 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 mm2) and 0.2 mm thick septa. The overall detector active area is roughly 65 mm2. 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 HgI2 x-ray detector with active area of about 3 mm2 and thickness of 500 μm.



Hide All
1. Patt, B.E., Iwanczyk, J.S., Tornai, M.T., Levin, C.S., and Hoffman, E.J., presented at 1994 Symposium on Radiation Measurements and Applications, May 16-19, 1994, Ann Arbor, Michigan. Submitted to Nucl Instr. & Meth. in Phys. Res. (1994).
2. Iwanczyk, J.S., Wang, Y.J., and Graham, W.R., Proceedings 8th Annual Waste Testing & Quality Assurance Symposium, 28-42, (1992).
3. Patt, B.E., Del Duca, A., Dolin, R., Ortale, C., IEEE Trans, Nucl. Sci, NS- 33(1986)523.
4. Patt, B.E., Beyerle, A.G., Dolin, R.C., Ortale, C.. Nucl. Instr. & Meth. in Phys. Res., A283 (1989)215.
5. Patt, B.E., Mat. Res, Sac. Proc, 302(1993)43.
6. Short, M.D., Nucl. Instr. & Meth., 221 (1984) 142.


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed