FIGURE 1.

Transverse slice and a coronal slice of the Dixon water image (left) depicting a myasthenia gravis (MG) patient (top) and Graves' orbitopathy (GO) patient (bottom), showing the lateral rectus muscle (LR), the medial rectus muscle (MR), the inferior rectus muscle (IR) and the superior rectus and levator palpebrae muscle complex (SR+LP). The temporalis muscle (TM) and the optic nerve (NO) are also labeled in the figures. On the right, the 3D ROIs are shown after automatic segmentation using ITK‐SNAP. Notice the enlarged extra‐ocular muscles in the GO patient