Figure 5From: Distribution of ultrasonic radiofrequency signal amplitude detects lipids in atherosclerotic plaque of coronary arteries: an ex-vivo study Analysis of IB parameters discriminates plaque with an early lipid core from plaque without a lipid core using a cut-off value of 32 for the variance of IB. The gray-scale image fails to display the lipid core (bottom left).Back to article page