Measurements of a prototype CdZnTe array for direct digital mammography

C. Freinberg-Trufas; Walter M. Gibson; Scott M. Owens; Christine H. Russell; Carolyn A. MacDonald; F. Patrick Doty

doi:10.1117/12.277682

7 July 1997 Measurements of a prototype CdZnTe array for direct digital mammography

C. Freinberg-Trufas, Walter M. Gibson, Scott M. Owens, Christine H. Russell, Carolyn A. MacDonald, F. Patrick Doty

Proceedings Volume 3115, Hard X-Ray and Gamma-Ray Detector Physics, Optics, and Applications; (1997) https://doi.org/10.1117/12.277682
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

Measurements have been performed on a prototype CdZnTe linear array designed for direct digital mammography. Direct detection of x-ray photons without conversion to visible light avoids the trade-off between resolution and efficiency with phosphor thickness inherent in the conversion process. Polycapillary x-ray optics can be used to shape the x-ray image in a manner similar to the use of fused fiber optic tapers with visible light. The polycapillary optics also provide significant scatter rejection and resultant contrast enhancement. The theoretical detector quantum efficiency of CdZnTe at mammographic energies (20 keV) is quite high. Measurements were performed of DQE values and uniformity from 13 - 256 keV in large single pixel detectors. Uniformity and imaging measurements were also performed on a prototype 1 cm long linear detector array with 50 micrometer pixels attached to read-out electronics using indium bump bonding technology.

Citation Download Citation

C. Freinberg-Trufas, Walter M. Gibson, Scott M. Owens, Christine H. Russell, Carolyn A. MacDonald, and F. Patrick Doty "Measurements of a prototype CdZnTe array for direct digital mammography", Proc. SPIE 3115, Hard X-Ray and Gamma-Ray Detector Physics, Optics, and Applications, (7 July 1997); https://doi.org/10.1117/12.277682

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