A-scan ultrasonography

A-scan ultrasonography, or amplitude scan ultrasound, is a medical imaging technique that uses high-frequency sound waves to measure distances within the body. It creates a one-dimensional image by sending sound waves into the tissues, which bounce back to the device. The time it takes for the echoes to return helps determine the size and depth of structures, such as tumors or organs. This method is often used in ophthalmology for measuring eye dimensions and can aid in diagnosing various conditions by providing precise measurements without involving radiation.