Subject(s)
Ciliary Body/surgery , Melanoma/surgery , Ophthalmologic Surgical Procedures , Uveal Neoplasms/surgery , Adult , Choroid Neoplasms/diagnostic imaging , Choroid Neoplasms/surgery , Ciliary Body/pathology , Humans , Male , Melanoma/diagnostic imaging , Ultrasonography , Uveal Neoplasms/diagnostic imagingABSTRACT
We conducted in vitro and in vivo experiments to study magnetic resonance imaging of intraocular foreign bodies. Diamagnetic and paramagnetic foreign bodies were imaged without artifact and without movement during the imaging process, while ferromagnetic foreign bodies produced large amounts of artifact that prevented meaningful images. All fetromagnetic foreign bodies moved during in vitro imaging. During in vivo imaging, three of four ferromagnetic bodies moved, producing substantial retinal injury. We concluded that magnetic resonance imaging is contraindicated in traumatized eyes with suspected ferromagnetic foreign bodies.
Subject(s)
Eye Foreign Bodies/diagnosis , Magnetic Resonance Spectroscopy , Animals , In Vitro Techniques , Iron , Magnetics , RabbitsABSTRACT
Nineteen patients with orbital floor fractures were examined and underwent computed tomography of both orbits. By evaluating the amount of orbital expansion and soft tissue herniation, we were able to identify a group of patients at high risk for developing enophthalmos (3/7 in the group with the largest amount vs. 0/7 and 0/5 in the two other groups). By studying the appearance of the inferior rectus muscle, we were also able to identify a group of patients at high risk for developing persistent diplopia (5/5 with entrapped muscles, 0/2 with hooked muscles and 0/12 of patients with free inferior rectus positions).
