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Proceedings Paper

Comparison Of Translate-Rotate And Pure Rotary Computed Tomography (CT) Body Scanners
Author(s): D. P. Boyd; A. R. Margulis; M. Korobkin
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Paper Abstract

Two types of fast fan-beam CT body scanners are in widespread clinical use. A bi-modal type employs a series of linear translations followed by rotational steps. Rotary scanners use pure rotary motion of the source and detector or source alone (stationary detector type). We have conducted comparison studies using production models of an EMI-5005 and a GE CT/T installed at the Department of Radiology, U.C.S.F. These include quantitative determinations of noise and resolution, semiquantitative comparisons using phantoms, and qualitative evaluation of CT images obtained from double-scanned patients. Image quality of the two machines is roughly comparable under normal use. The most important differences involve the frequency and character of artifacts. The smoothness and speed of the rotary system's scanning motion greatly reduces that systems sensitivity to patient-motion-related streak artifacts. On the other hand the translate-rotate system currently offers higher spatial resolution and optional slow, high-dose, high-sensitivity scans.

Paper Details

Date Published: 27 December 1977
PDF: 6 pages
Proc. SPIE 0127, Application of Optical Instrumentation in Medicine VI, (27 December 1977); doi: 10.1117/12.955951
Show Author Affiliations
D. P. Boyd, University of California (United States)
A. R. Margulis, University of California (United States)
M. Korobkin, University of California (United States)


Published in SPIE Proceedings Vol. 0127:
Application of Optical Instrumentation in Medicine VI
Joel E. Gray; William R. Hendee, Editor(s)

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