Figure 5.

Example of hybrid PET perfusion and CT angiography. a: CT angiography (step-and-shoot mode) shows multi-vessel disease with massive coronary calcifications and severe stenoses in all major coronary arteries. b: Hybrid display during adenosine stress demonstrates quite preserved perfusion in anterolateral wall but moderate reduction in septal wall (anterior view). In RCA related region the perfusion was the most severely reduced (posterior view) indicating culprit stenosis in this vessel. Perfusion was colour scaled so that red colour denotes to 3.5 ml/min/g. Resting perfusion was normal (not shown). Total radiation dose of the hybrid study w as 11.3 mSv.