Importance of Reference Muscle Selection in Quantitative Signal Intensity Analysis of T2-Weighted Images of Myocardial Edema Using a T2 Ratio Method

Figure 5

Basal short axis views in a patient 5 months after acute myocardial infarction (the same patient as shown during the acute stage in Figure 2). (a) T2-weighted image without evidence of significantly increased signal intensity. (b) Color-coded visualization of the automated sizing of the myocardium at risk using the T2 SI ratio with four different muscle groups as reference regions. All muscles except for the serratus anterior resulted in significant false positive results.