The aim is to develop a high resolution, high contrast detector for digital x-ray imaging systems. The target detector would have a Detective Quantum Efficiency much greater than 80%, a limiting resolution of at least 10 lp/mm, ultra-low noise, linear response and a dynamic range of more than 14 bits. The proposal is to build such a detector by using CdZnTe crystals. The detector crystal is hybridized to a readout integrated circuit device that allows the signal to be collected efficiently, digitized and stored in a computer as an image matrix. The planned individual detector unit, designed for use in a slot scan system, has 192 stages in the scan direction and 384 columns in the non-scan direction. The detectors are planned to be mounted in a staggered array with overlap at the ends up to the full breast x-ray image width (approximately 25 cm) in the non-scan direction. The detector pixel pitch will be 50 microns with 100% fill factor. Compared to the present film systems, a reduction of patient dose by a factor of six can be achieved without loss of image quality. To achieve these objectives, in this proposal we plan to develop and demonstrate: a high quality and high spatial resolution bump bonding technique; an optimized readout IC for the CZT crystals; and a reliable, low-cost, high throughput technique to test and select high quality, high uniformity CZT crystals.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Small Business Technology Transfer (STTR) Grants - Phase II (R42)
Project #
1R42CA110192-01
Application #
6830111
Study Section
Special Emphasis Panel (ZCA1-SRRB-D (M2))
Program Officer
Torres-Anjel, Manuel J
Project Start
2004-09-17
Project End
2005-02-28
Budget Start
2004-09-17
Budget End
2005-02-28
Support Year
1
Fiscal Year
2004
Total Cost
$99,904
Indirect Cost
Name
Aguila Technologies, Inc.
Department
Type
DUNS #
957992522
City
San Marcos
State
CA
Country
United States
Zip Code
92078