Ultrasound B-Scan: A Ready Reckoner for the Postgraduates
The importance of ultrasound imaging cannot be stressed upon more than the fact that whether you are an anterior segment surgeon, posterior segment surgeon or oculoplastic surgeon, the indications for this modality transcend across all genres of ophthalmology. Many a time, postgraduates find this topic daunting to interpret. This article aims to simplify Ultrasound B-scan in terms of mechanics, terminology, actual procedure, and interpretation without delving deep into the confusing jargon. Some common conditions and their typical presentations will also be touched upon. For ease of understanding, we will divide this article into the following sections: History Basic physics and instrumentation Terminology Indications Examination techniques: basic and special Features of commonly encountered posterior segment conditions History Though the concept of ultrasound waves was known to humans in the 18th century (Lazzaro Spallanzini’s observation on the use of ‘sound whistles’ by bats in dark

