Comparison Of Translate-Rotate And Pure Rotary Computed Tomography (CT) Body Scanners

D. P. Boyd; A. R. Margulis; M. Korobkin

doi:10.1117/12.955951

27 December 1977 Comparison Of Translate-Rotate And Pure Rotary Computed Tomography (CT) Body Scanners

D. P. Boyd, A. R. Margulis, M. Korobkin

Proceedings Volume 0127, Application of Optical Instrumentation in Medicine VI; (1977) https://doi.org/10.1117/12.955951
Event: Application of Optical Instrumentation in Medicine VI, 1977, Boston, United States

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.

Citation Download Citation

D. P. Boyd, A. R. Margulis, and M. Korobkin "Comparison Of Translate-Rotate And Pure Rotary Computed Tomography (CT) Body Scanners", Proc. SPIE 0127, Application of Optical Instrumentation in Medicine VI, (27 December 1977); https://doi.org/10.1117/12.955951

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