Ophthalmic Ultrasound

B-Scan (Ophthalmic Ultrasound)

B-scan Ultrasonography often called just B-scan or Brightness scan offers a two-dimensional cross-sectional view of the eye as well as the orbit. A B-scan is used on the outside of the closed eyelid to view the eye.

This type of diagnostic tool is most helpful when there is difficulty examining the eye normally. There might be lid problems that make a routine examination difficult like edema or tarsorrhaphy or severe cataracts and keratoprosthesis.

A B-scan can help accurately view other eye structures like the lens, choroid, sclera, vitreous, and retina. A B-scan is helpful in diagnosing retinal detachment. A B-scan is often a tool combined with an A-scan to help determine various eye abnormalities.

Noninvasive Evaluation

Ophthalmic ultrasound is an invaluable tool that provides a quick and noninvasive evaluation of the eye and the orbit. It not only allows clinicians to view structures that may not be visible with routine ophthalmic equipment or neuroimaging techniques but also provides unique diagnostic information in various ophthalmic conditions. In this article, the basic principles of ophthalmic ultrasound and examination techniques are discussed.

Its clinical application is illustrated through a variety of ocular pathologic abnormalities (eg, narrow angles, ciliary body tumor, detached retina, choroidal melanoma, and papilledema).

Ultrasound Tomography

Three-dimensional ultrasound tomography of the eye is a new advanced technique of ocular ultrasonography. The aim of this work was to present a new interesting ultrasound unit with the possibility of three-dimensional ultrasound tomography, after half a year of experience with this system.

​​​​​​​The article describes scanning techniques using a commercial 3-D ultrasound system (OTI-Scan 1000) and presents how to assess the dimensions of intraocular structures and document them volumetrically.

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