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Proceedings Paper

Reconstructed x-ray image for one-dimensional translation of an area focal plane array
Author(s): Gary E. Halama; James A. McAdoo; Hong Liu
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Paper Abstract

We report experimental results that further confirm the feasibility of a novel large-field digital mammography technique. This technique uses a mosaic of area array CCDs in a checker board like pattern with spacing left between the CCDs for the driver and readout electronics. To obtain a complete x-ray image, the mosaic must be repositioned four times with an x-ray exposure at each position. To reduce the patient dose, a lead shield with appropriately patterned holes is introduced between the x-ray source and the patient. A previous report with similar tests used optical sources to evaluate the fundamental system concepts. The results reported here, however, were obtained using x-ray images acquired under clinical conditions and represent a more realistic demonstration of our concept. A high precision translation stage was used to position a fiber-coupled scintillating screen/CCD sensor assembly and acquire two images per sequence. These images were then combined using a simple computer algorithm to produce a seamless composite. A systematic but relatively easy alignment of the two critical surfaces yielded consistent, repeatable alignment of the images in the composite. These results make a convincing case for the feasibility of our area-scanning large-field mammography concept.

Paper Details

Date Published: 24 April 1996
PDF: 4 pages
Proc. SPIE 2676, Biomedical Sensing, Imaging, and Tracking Technologies I, (24 April 1996); doi: 10.1117/12.238789
Show Author Affiliations
Gary E. Halama, Science Applications International Corp. (United States)
James A. McAdoo, NASA Langley Research Ctr. (United States)
Hong Liu, Univ. of Virginia (United States)


Published in SPIE Proceedings Vol. 2676:
Biomedical Sensing, Imaging, and Tracking Technologies I
Robert A. Lieberman; Halina Podbielska; Tuan Vo-Dinh, Editor(s)

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