TG18 test patterns can be used to evaluate the performance of medical display devices. TG18 test patterns are a part of the larger display assessment methodology developed by TG18 (Task Group 18) of the AAPM.

The most important test pattern, the TG18-QC test pattern, is based on the original SMPTE test pattern. The TG18-QC pattern is widely used to provide an overall assesment of a monitor’s adjustment and calibration.

Sample image derived from the “Assessment of Display Performance for Medical Imaging Systems” report (AAPM On-line report No 3), published in 2005 and available at:

An executive summary of the report is available at:

The Task Group 18 home page is:


  • Uncategorized


WW stands for Window Width. Window Width controls contrast is a range of grayscale values to be mapped on monitor…


SMPTE (Society for Motion Picture and Television Engineers) is an international standards development organization. SMPTE has specified several test patterns,…

SOP Class

A SOP (Service Object Pair) Class is a combination of a service such as Store, Retrieve, and an object such…