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30 June 1993 Quality control for on-line portal imaging systems
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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.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Rasika Rajapakshe, Thomas J. Radcliffe, and Shlomo Shalev "Quality control for on-line portal imaging systems", Proc. SPIE 1897, Medical Imaging 1993: Image Capture, Formatting, and Display, (30 June 1993);

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