Abstract
A quality assurance (QA) test has been developed as a practical means to routinely monitor digital image resolution. The method is based upon a parameter termed the image modulation M. When noise is present M cannot be directly measured. Instead, a biased estimate of M, designated M', is measured. This report describes the application of the parameter M' to QA monitoring of digital image resolution. A measurement of M' is generally simpler than alternative measurements, and is shown to outperform visual evaluation in the clinical QA environment.
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