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Proceedings Paper

Use of tuned aperture computed tomography (TACT) with a large-scale imaging panel for 3D tomography of the skull
Author(s): Robert H. Vandre; Richard L. Webber; Roger A. Horton; Denny L. Y. Lee; Lothar S. Jeromin
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Paper Abstract

Surgeons often need to localize foreign objects in wounded patients in facilities where computed tomography (CT) may not be present or is contraindicated by anticipation of massive CT artifacts associated with imaging radiopaque materials such as shrapnel. A skull phantom was placed on top of a 22 by 18 cm radiographic imaging panel developed by Du Pont Diagnostic Imaging Systems in both posterior-anterior (PA) and lateral orientations. A radiopaque reference sphere (2 mm dia.) was attached to the phantom and a set of eight, two- dimensional radiographic projections was obtained for each of the two orientations. This was done by laterally displacing the x-ray head in a plane parallel to the projection panel to eight different positions well distributed around the periphery of a solid angle approximating 25 degrees. An operator identified the reference shadow on each digital projection. This information was used by the TACT system to compute tomographic slices based on the reference sphere's relative displacement in the field. These TACT slices were compared directly with tomographs of the same region of the skull made with a Phillips Model BTS4 tomographic machine. Both methods appeared to yield clinically interpretable images of comparable diagnostic quality.

Paper Details

Date Published: 11 April 1996
PDF: 6 pages
Proc. SPIE 2708, Medical Imaging 1996: Physics of Medical Imaging, (11 April 1996); doi: 10.1117/12.237850
Show Author Affiliations
Robert H. Vandre, Walter Reed Army Research Institute (United States)
Richard L. Webber, Bowman Gray School of Medicine/Wake Forest Univ. (United States)
Roger A. Horton, Bowman Gray School of Medicine/Wake Forest Univ. (United States)
Denny L. Y. Lee, Du Pont Imaging Systems (United States)
Lothar S. Jeromin, Du Pont Imaging Systems (United States)


Published in SPIE Proceedings Vol. 2708:
Medical Imaging 1996: Physics of Medical Imaging
Richard L. Van Metter; Jacob Beutel, Editor(s)

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