Definition of "hyperenhancement"

For example, transmural hyperenhancements ranging from 26 to 50 percent in dysfunctional myocardial segments predicted with a less than 50 percent accuracy a postrevascularization improvement in contractile function.

2007, Valentin Fuster, Robert A. O'Rourke, Richard Walsh, Hurst's the Heart, page 675

One would expect the area of hypoenhancement on first-pass imaging to be larger than that of hyperenhancement on delayed contrast-enhanced imaging.

2007, Applied Radiology, page 14