Table 5.

Normative orbital measurements on fat suppressed contrast-enhanced T1-weighted MRI compared to T1-weighted MRI

Measurement	Plane	T1 MRI (mean ± SD in mm)	T1 FS CE (mean ± SD in mm)	P-value
LR	Axial	3.46 ± 0.64	3.87 ± 0.67	< 0.01
MR	Axial	4.13 ± 0.53	4.10 ± 0.49	0.54
MR	Coronal	4.01 ± 0.52	4.04 ± 0.50	0.48
SMG	Coronal	4.30 ± 0.68	4.51 ± 0.66	< 0.01
IR	Coronal	4.70 ± 0.71	4.59 ± 0.73	0.07
SOV	Coronal	2.13 ± 0.72	1.89 ± 0.72	< 0.01
Sum of muscles	Axial, coronal	16.6 ± 1.74	17.1 ± 1.71	< 0.01

LR lateral rectus, MR medial rectus, SMG superior muscle group, IR inferior rectus, SOV superior ophthalmic vein