digital subtraction angiography (DSA)
Jump to navigation
Jump to search
Introduction
Angiobraphy with images produced by subtracting a pre-contrast image from images after contrast is introduced.
Indications
- visualization of arterial & venous occlusions, including
- visualizing cerebral aneurysms & arteriovenous malformations (AVM)
Clinical significance
- images obtained from standard angiography include all overlying structure besides the blood vessels
- this is useful for determining anatomical position & but interferes with visualizing blood vessels
- digital subtraction angiography subtracts background noise from the fluoroscopic images of the blood vessels
More general terms
References
- ↑ Wikipedia: Digital subtraction angiography http://en.wikipedia.org/wiki/Digital_subtraction_angiography
- ↑ Digital Subtraction Angiography (DSA) NHS Foundation http://www.dbh.nhs.uk/our_services/medical_imaging/digital_subtraction_angiography.asp
- ↑ DSA means Digital Subtraction Angiography http://www.droid.cuhk.edu.hk/web/service/angio/dsa.htm