Orbital Volumetry in Graves' Orbitopathy: Muscle and Fat Involvement in relation to Dysthyroid Optic Neuropathy
Figure 2
(a) The volumes of muscles in normal orbits, GO orbits without DON, and GO orbits with DON. The mean muscle volume was higher in GO patients than in controls (), but the mean volumes in orbits with and without DON were not significantly different. Note that the muscle volume was over the normal range in all 7 orbits with DON, whereas this was only the case in 11 of 14 orbits without DON. (b) The volumes of orbital fat in normal orbits, GO orbits without DON, and GO orbits with DON. The mean fat volume was higher in GO patients than in controls (), but there was no statistically significant difference between orbits with and without DON. (c) The mean volumes of the optic nerve in normal orbits, GO orbits with DON, and GO orbits without DON. No significant difference between the 3 groups was observed. N = normal orbits, GO = GO orbits without DON, and DON = GO orbits with DON. (b) The volumes of orbital fat in normal orbits, GO orbits without DON and GO orbits with DON. The mean fat volume was higher in GO patients than in controls (), but there was no statistically significant difference between orbits with and without DON. (c) The mean volumes of the optic nerve in normal orbits, GO orbits with DON, and GO orbits without DON. No significant difference between the 3 groups was observed. N = normal orbits, GO = GO orbits without DON, and DON = GO orbits with DON.
