digital subtraction angiography
An imaging technique that enhances vessel visualization by digitally removing background structures from contrast-enhanced images.
Full Definition
Digital subtraction angiography (DSA) is a specialized X-ray technique that creates detailed images of blood vessels by subtracting pre-contrast images from post-contrast images, effectively removing background tissues and bones. This method provides superior visualization of vascular anatomy and pathology compared to conventional angiography. DSA is considered the gold standard for many vascular imaging applications and is frequently referenced in imaging protocols and comparative studies. The technique requires precise patient positioning and breath-holding to avoid subtraction artifacts.
Usage
Usage note: Often abbreviated as DSA; ensure proper capitalization when spelling out the full term.
In Context
- "Digital subtraction angiography revealed multiple feeding arteries to the arteriovenous malformation." — Neuroradiology report
- "The imaging protocol included digital subtraction angiography for optimal vessel delineation." — Radiology procedure note