Fig. 1
From: Easily detected signs of perineural tumour spread in head and neck cancer
Coronal (a) and oblique sagittal (b) reformatted CT images, as well as coronal (c) T1-weighted images illustrate the normal fat pad (arrows) around the ophthalmic nerve (V1) at the orbital apex (a) and superior to the levator palpebrae muscle (b–c). Axial CT image (d) demonstrates small normal fat pads anterior to the superior orbital rim (arrows) which can be also well-appreciated on (b) the oblique sagittal CT (arrowhead)