Fig. 7

Findings in subject 4. The white arrows highlight the site of the suspected pituitary tumor on the baseline MR (MR1), the skewed tracer distribution of the baseline Met-PET (PET1) and the focal signal seen on the subtraction images. The black arrow highlights the variability of the Met-PET signal, and the yellow arrow highlights the effect of this on the subtraction image; the SUVbw values of the suppressed Met-PET are higher than those of the baseline, and therefore, the difference between them (seen in the SUVbwSub image) is not as pronounced as that of the normalized images (seen in the SUVrSub [cerebellum] image)