FIGURE 4. Examples of image quality obtained with ¹⁸F-FDG SPECT after oral administration of acipimox. (A) Baseline ^99mTc-tetrofosmin (left), dual-isotope simultaneous acquisition (DISA) ^99mTc-tetrofosmin (middle), and DISA ¹⁸F-FDG (right) short-axis images of patient with NIDDM. All images are of good quality; this patient had M/B ratio of 4.2. (B) Baseline ^99mTc-tetrofosmin (left), DISA ^99mTc-tetrofosmin (middle), and DISA ¹⁸F-FDG (right) short-axis images of patient with IDDM. ¹⁸F-FDG images are of poor quality. This patient had M/B ratio of 2.1.