Detecting Triple-Vessel Disease with Cadmium Zinc Telluride-Based Single-Photon Emission Computed Tomography Using the Intensity Signal-to-Noise Ratio between Rest and Stress Studies

Figure 2

The MPI images of a representative TVD case, a 55-year-old man, which showed obvious ischemic deficits. From top to down, the original axial views of the stress acquisition, the segmented axial views of the stress acquisition, and the polar maps were shown. SSS, SRS, and SDS are 14, 0, and 14, respectively. Although the images show ischemic defects in the LAD and LCX, the segmentation was successful to delineate the LV. The SDS was 14 and the RSNR was 0.71. CAG found stenosis of 86% in the LAD, 82% in the LCX, and 68% in the RCA. CAG, coronary angiography; LAD, left anterior descending; LCX, left circumflex; RCA, right coronary artery; RSNR, stress-to-rest ratio of the signal-to-noise ratio; SDS, summed difference score.