Total and Noncalcified Plaque Composition (IMAGE) Radiological Society of North America Caption The graph shows total and noncalcified plaque composition (in square millimeters) as a function of CAC score. For very high CAC scores (?400), noncalcified plaque was approximately 67 percent of the total plaque index. For lower plaque scores (11-100), noncalcified plaque was approximately 82 percent of the total plaque index. Credit Image courtesy of the Radiological Society of North America Usage Restrictions May use with credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.