Fusion Imaging Between Myocardial Perfusion Single Photon Emission Computed Tomography and Cardiac Computed Tomography
A 68-year-old woman with an acute myocardial infarction with left anterior descending artery stenosis had undergone percutaneous transluminal coronary angioplasty and coronary stenting, (Figure 1). Three weeks later, ECG-gated cardiac 8-slice CT angiography and thallium stress test were performed in a combined SPECT/CT system. All of the CT and SPECT images were sent to a PC for registration and conversion by using original programs written in the Borland Delphi computer language. Reconstructed images of CT and SPECT were sent to a dedicated workstation (ZIO M900, Zio Software) and both images were fused. The fused images (Figure 2) showed a perfect match between the left anterior descending artery territory and the defect of tracer uptake. Volume-rendering fused image allows a panoramic view between coronary vessels and myocardial perfusion, and relationship of diseased artery and myocardium can be assessed precisely.