FIGURE 3. Patient 66 with sarcoidosis (3.1 x 2.7 cm). (A) CT image shows nodule in right lung. (B) FDG PET image shows hot accumulation in nodule (SUV, 10.3; T/N, 15.3). (C) Early scan on ²⁰¹Tl SPECT. (D) Delayed scan on ²⁰¹Tl SPECT. ²⁰¹Tl SPECT reveals good visualization of nodule (ER, 1.63; DR, 2.33; RI, 42.9%).