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Proceedings Paper

Windmill artifacts analysis in MSCT
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Paper Abstract

One of the most important advantages of the novel multi slice CT (MSCT) with increased number of slices is the ability to reduce the scan time. However, does the increased number of slices in the MSCT enforce us to reduce the pitch, in order to avoid windmill artifacts, hence preventing us from decreasing the scan time? In this work we address this issue along with other aspects of the windmill artifacts. We study the dependence of the windmill artifacts, their strength and frequency, on the number of slices and on the pitch. The study demonstrates, that when retaining constant bed speed while increasing the number of slices, the intensity of the windmill artifacts is reduced significantly. Images of scans performed with the same pitch, yet with various number of slices are compared. It is observed, that the intensity of the windmill artifacts is similar, independent of the number of slices. The frequency of the artifacts however, increases with the number of slices. The study concludes that updating a clinical protocol performed with a low number of slices MSCT, to a similar protocol performed with high number of slices MSCT, the same pitch can be used attaining better IQ. Scanning with the same pitch using wider coverage enables an advantageous shorter scan time in novel MSCT.

Paper Details

Date Published: 2 March 2006
PDF: 8 pages
Proc. SPIE 6142, Medical Imaging 2006: Physics of Medical Imaging, 61422H (2 March 2006); doi: 10.1117/12.652681
Show Author Affiliations
O. Amir, Philips Medical Systems Technologies Ltd. (Israel)
I. Sabo-Napadensky, Philips Medical Systems Technologies Ltd. (Israel)


Published in SPIE Proceedings Vol. 6142:
Medical Imaging 2006: Physics of Medical Imaging
Michael J. Flynn; Jiang Hsieh, Editor(s)

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