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Proceedings Paper

Description Of A Digital Tomosynthesis (DTS) System
Author(s): Robert C. Murry Jr.; Kenneth R. Maravilla
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Paper Abstract

Digital tomosynthesis (DTS) is the implementation of classical geometric tomography on a digital radiography system. A set of original images is collected during a single tomographic sweep. These images are spatially shifted, corrected for distortion if necessary, and added together to synthesize a single cut in any desired plane. Any number of additional cuts can be synthesized from the same set of original images by altering the amounts of shift and correction. A practical system for performing DTS is described. Engineering limits and the results of human and animal studies are presented. Our work in DTS was prompted by earlier efforts of Bally and co-workers on an analog system, and evolved through an early digital prototype reported elsewhere. The present system, based on commercially available digital fluoroscopy equipment, is more flexible. Data collection time can be short (down to 1/2 second) to permit angiotomography, which may be the most important application for the method. Mask subtraction and spatial filtering to remove out of focus information are options. The synthesis programs produce a new cut plane every few seconds. Contiguous stored planes can be rapidly replayed. Contrast sensitivity in the DTS mask subtraction option is close to simple digital fluoroscopy subtraction, but spatial resolution is somewhat worse. A linear tomographic motion and 512 by 512 pixel image are presently used. Extensions to other motions and larger matrix sizes are under development.

Paper Details

Date Published: 13 December 1983
PDF: 9 pages
Proc. SPIE 0419, Application of Optical Instrumentation in Medicine XI, (13 December 1983); doi: 10.1117/12.936022
Show Author Affiliations
Robert C. Murry Jr., University of Texas Health Science Center at Dallas (United States)
Kenneth R. Maravilla, University of Texas Health Science Center at Dallas (United States)

Published in SPIE Proceedings Vol. 0419:
Application of Optical Instrumentation in Medicine XI
Gary D. Fullerton, Editor(s)

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