Comparative Analysis between SPECT Myocardial Perfusion Imaging and CT Coronary Angiography for Diagnosis of Coronary Artery Disease

Figure 3

Patient with stenosis in the proximal segment of LAD classified as ≥50% on CTCA related with large and reversible perfusion defects (ischemia) in apex, anterior, and septal wall on MPI. (a) and (b) Multiple reformation (MPR) and maximal intensity projection (MIP) on CTCA showed noncalcification plaque in the proximal segment of LAD adjacent to the ostia of diagonal branch causing a significant stenosis (arrows), and no positive results on other main arteries were found. (c) ICA of left coronary arteries showed severe stenosis (arrow) in the same segment of LAD compared with CTCA. (d) ICA of left coronary arteries showed successful stenting (arrow) for the lesion in the proximal segment of LAD. (e) SPECT MPI study at stress (odd row) and rest (even row) showed large and reversible perfusion defects in the area of apex, anterior and septal wall corresponding to the territory of LAD, indicating large and severe myocardial ischemia.