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Proceedings Paper

Backscatter X-Ray Radiography: Medical Applications
Author(s): Alan M. Jacobs; Bruce C. Towe; John E. Harkness
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Paper Abstract

A new x-ray perspective and tomographic imaging technique which employs the field backscattered by an object has been demonstrated to have interesting medical applications. The resulting radiographs appear as if the objects' internal features were interrogated by an "x-ray eye." Uncollimated detectors are placed on the same side of the object as the incident radiation. A flying spot technique creates a backscatter image. Spatial resolution of the system is dictated by the diameter of an x-ray beam which raster scans the object under study. One millimeter resolution at penetration depths of several centimeters of tissue equivalent material is demonstrated with the use of short pixel dwell times to achieve radiation dose levels of the order of 10 mR. A system which generates real time x-ray backscatter images was constructed and used to examine biological and test objects. Two modes of image formation have been employed: 1. The unusual perspective of an x-ray backproj ection of internal features. 2. The differentiation of different peak voltage scans to obtain longitudinal tomographic images. The system is sufficiently practical with several medical x-ray sources that medical diagnostic radiography could immediately derive benefit from the changed point-of-view.

Paper Details

Date Published: 26 December 1979
PDF: 6 pages
Proc. SPIE 0206, Recent and Future Developments in Medical Imaging II, (26 December 1979); doi: 10.1117/12.958203
Show Author Affiliations
Alan M. Jacobs, The Pennsylvania State University (United States)
Bruce C. Towe, The Pennsylvania State University (United States)
John E. Harkness, The Pennsylvania State University (United States)

Published in SPIE Proceedings Vol. 0206:
Recent and Future Developments in Medical Imaging II
David G. Brown; Stephen W. Smith, Editor(s)

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