title: Ocular sonography.
abstract: High-frequency ocular sonography is the ideal method for imaging the eye and intraocular structures. In the presence of opaque ocular media, a complete view of the fundus may be impossible ophthalmoscopically, and in these cases sonography is invaluable. Although high field strength MR imaging with surface coils provides excellent detail of normal and pathologic ocular structures, major shortcomings are lack of spatial resolution and poor specificity with certain lesions. Sonography is superior to CT or MR imaging in detecting ocular lesions such as small melanomas that are 2 mm or less in thickness. The eye can be examined dynamically during eye movements, which is of value in localizing abnormalities. The sonographic appearance of a variety of ocular pathologic conditions is illustrated in this essay.
authors.affiliation: Department of Radiology, University College Dublin, Ireland.
authors.forename: M M
authors.initials: MM
authors.lastname: McNicholas
authors.forename: D P
authors.initials: DP
authors.lastname: Brophy
authors.forename: W J
authors.initials: WJ
authors.lastname: Power
authors.forename: J F
authors.initials: JF
authors.lastname: Griffin
mesh_terms: D005123:Eye / Q000000981:diagnostic imaging*; D005128:Eye Diseases / Q000000981:diagnostic imaging*; D005133:Eye Movements; D005134:Eye Neoplasms / Q000000981:diagnostic imaging; D006801:Humans; D008545:Melanoma / Q000000981:diagnostic imaging; D014463:Ultrasonography / Q000379:methods