All three possible scenarios. (a) PMC OFF worse performance than PMC ON, T2-w images with resolution 0.28×0.28×1.0 mm3; (b) PMC OFF similar performance as PMC ON, T1-w images, isotropic resolution over all slices in the volume for AES and gradient entropy metrics respectively. 0.45 mm3; (c) PMC OFF better performance than PMC ON (reflections in the OMTS system, explained in Fig.5), T2∗-w images, resolution 0.25×0.25×1.5 mm3. Ravg is the average subjective score, while AESavg and GEavg, the average scores over all slices in the volume for AES and gradient entropy metrics respectively.