Fig. 5

A 71-year-old male patient who presented with stable chest pain syndrome and a history of cigarette smoking, hyperlipidaemia and hypertension. His right (a) and left anterior descending coronary arteries (b) demonstrate the presence of calcified and non-calcified plaque in all proximal vessel segments. The middle segment of the RCA has extensive calcification (arrows). Owing to limited evaluability of the coronary lumen, the presence of significant coronary artery stenosis could not be ruled out. As part of a research protocol, the subject underwent dynamic adenosine-mediated stress myocardial perfusion imaging (100 kV, 175 mAs/rot) over a period of 30 s. Fusion images of the left ventricle (LV) in long axis (c) and short axis (d) demonstrate homogeneous myocardial blood flow without any evidence of stress-induced myocardial hypoperfusion. The measured myocardial blood flow was approximately 125 ml/min/100 g