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FIGURE 2. Coregistered 18F-FET PET, 123I-IMT SPECT, and MRI of 56-y-old woman with a malignant oligodendroglioma (patient 14) in the right frontal lobe. The tumor was clearly identified on 18F-FET PET and 123I-IMT SPECT and was rated as definitely present by all 3 observers. The TBR was 3.4 for 18F-FET PET scans and was 2.2 for 123I-IMT SPECT scans. On PET images, the accumulation of 18F-FET was higher in the superior sagittal sinus (arrowhead) and in the temporal muscle (arrows) compared with that on the 123I-IMT SPECT images. (A) 18F-FET PET. (B) MRI. (C) 123I-IMT SPECT.
