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FIGURE 4. Baseline 99mTc-tetrofosmin, DISA 99mTc-tetrofosmin, and DISA 18F-FDG SPECT images of patient with known 2-vessel disease. (Top row) Baseline 99mTc-tetrofosmin short-axis (SA), horizontal long-axis (HLA), and vertical long-axis (VLA) slices. (Center row) Corresponding DISA 99mTc-tetrofosmin images. (Bottom row) Corresponding 18F-FDG slices. There is large severe defect in perfusion and glucose metabolism in area of apex (matched pattern, scar; vertical arrows). In septum, there is moderate perfusion defect with nearly normal glucose metabolism (mismatch pattern, viable; oblique arrows). Additionally, there is mild perfusion defect in basal posterior area with mismatch (best seen on HLA images, no arrows). DISA perfusion images are less sharp than baseline perfusion images, but diagnostic information is retained.
