To the Editor.
—Ophthalmic ultrasound using the B-scan mode has been widely used by ophthalmologists for the diagnosis of ocular disease when the media is not clear enough for visual diagnosis and for the evaluation of intraocular tumors and foreign bodies.1 When instrumentation designed for ocular use is not available, neurosurgically or urologically oriented machines may be used for ocular diagnosis.We have used the Diasonic 400 Series Ultrasonic Imaging System (Diasonics Inc, Malipitas, Calif) using a neurosurgical probe with a 10-MHz transducer to perform B-scan ultrasonography. This has been useful in screening patients with cataract with opaque media, looking for retinal detachments in patients with vitreous hemorrhage, and for examining patients with intraocular tumors (Figure, choroidal melanoma). We found the images obtained to be of high quality. In addition, the ability to measure lesion size was useful in the evaluation of a patient with a choroidal tumor.We
Johnston CA, Teitelbaum CS. Ultrasonography With Nonophthalmic Equipment. Arch Ophthalmol. 1990;108(11):1516. doi:10.1001/archopht.1990.01070130018006