Imaging anatomy of the normal orbit.

Sectional imaging by CT and MRI now displays the gross anatomy of the orbit in vivo. Gross anatomy, axial and coronal CT, and MRI will be used to review the anatomic features of the orbit critical to image interpretation. Familiarity with the positions, relationships, and normal appearance of the major structures described and illustrated in this article will provide a solid basis for interpreting images of orbital pathology, as discussed in subsequent articles.