a-scan ultrasonography

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Word: A-scan ultrasonography

Part of Speech: Noun

Definition: A-scan ultrasonography is a medical test that uses sound waves to create a picture of the inside of the eye. It is specifically used to measure the length of the eyeball.

Explanation:

• Ultrasonography is a technique that uses high-frequency sound waves to see inside the body.
• A-scan refers to a specific type of ultrasonography that shows a single-dimensional image. In this context, it is used to measure how long the eyeball is, which is important for vision-related assessments and treatments.

Usage Instructions:

You would typically encounter this term in a medical context, especially in ophthalmology (the branch of medicine that deals with the eyes).

Example Sentence:

"The doctor performed an A-scan ultrasonography to determine the length of the patient’s eyeball before planning for cataract surgery."

Advanced Usage:

In more advanced medical discussions, you might hear about "B-scan ultrasonography," which provides a two-dimensional view, while A-scan gives a one-dimensional measurement.

Word Variants:

• Ultrasonography: This is the broader term that includes various types of ultrasound imaging.
• A-scan: Refers specifically to the one-dimensional measurement technique.

Different Meanings:

• In other contexts, ultrasonography can refer to various imaging techniques used for different parts of the body, not just the eye.

Synonyms:

• Eyeball measurement ultrasound
• Ocular A-scan

Related Idioms and Phrasal Verbs:

This term does not have specific idioms or phrasal verbs associated with it, as it is quite technical. However, related phrases might include: - "To get a check-up" (referring to a general medical examination) - "To have an eye exam" (a more general term that may include A-scan ultrasonography as part of the exam)

Summary:

A-scan ultrasonography is a specialized medical tool used to measure the length of the eyeball using sound waves.

Academic

Noun

1. the use of ultrasonography to measure the length of the eyeball

Synonyms

• a-scan ultrasonography