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Proceedings Paper

Quality control for on-line portal imaging systems
Author(s): Rasika Rajapakshe; Thomas J. Radcliffe; Shlomo Shalev
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Paper Abstract

A Quality Control (QC) test suitable for routine daily use has been developed for video based on-line portal imaging systems. It is designed to test for acceptable performance in high contrast spatial resolution. A phantom consisting of five sets of high-contrast rectangular bars with spatial frequencies of 0.1, 0.2, 0.25, 0.4, and 0.75 lp/mm is used for the test. A critical frequency fc for which the square wave MTF is 50% is used as a 'go/no go' decision level for passing the test. Data obtained during a one month period were used to determine fc. The test is shown to provide an automatic and objective measure of the system's imaging performance and is a useful QC tool for routine clinical work.

Paper Details

Date Published: 30 June 1993
PDF: 7 pages
Proc. SPIE 1897, Medical Imaging 1993: Image Capture, Formatting, and Display, (30 June 1993); doi: 10.1117/12.146958
Show Author Affiliations
Rasika Rajapakshe, Manitoba Cancer Treatment and Research Foundation (Canada)
Thomas J. Radcliffe, Manitoba Cancer Treatment and Research Foundation (Canada)
Shlomo Shalev, Manitoba Cancer Treatment and Research Foundation and Univ. of Manitoba (Canada)


Published in SPIE Proceedings Vol. 1897:
Medical Imaging 1993: Image Capture, Formatting, and Display
Yongmin Kim, Editor(s)

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