Arterial Vascular Imaging Glossary
100 terms total — 24 showing — Last updated 15 Sep 2026
contrast nephropathy CIN
Acute kidney injury occurring after intravascular contrast agent administration.
resistivity index
Doppler parameter calculated from peak systolic and end-diastolic velocities to assess downstream vascular resistance an...
run-off vessel
Distal arterial vessels that provide outflow from a more proximal arterial segment, particularly in the lower extremitie...
runoff
Imaging evaluation of peripheral arteries from the aortoiliac region to the pedal vessels.
runoff study
Angiographic examination of peripheral arteries from aorta to pedal vessels to assess patency throughout the arterial tr...
selective catheterization
Targeted placement of a catheter into a specific arterial branch for isolated contrast injection and imaging.
Spetzler-Martin grading
Classification system for cerebral arteriovenous malformations based on size, eloquence of adjacent brain, and pattern o...
steal phenomenon
Retrograde blood flow pattern where blood is diverted from one vascular territory to supply another area of lower resist...
stenosis
Abnormal narrowing of a blood vessel that restricts blood flow.
string-of-beads sign
A characteristic angiographic appearance of alternating areas of stenosis and dilation resembling a beaded necklace.
subclavian steal syndrome
Vascular condition where proximal subclavian artery stenosis causes retrograde flow in the ipsilateral vertebral artery,...
subintimal angioplasty
Technique for crossing chronic total occlusions by creating a controlled dissection plane.
tandem lesions
Multiple sequential stenotic lesions in the same arterial vessel or circulation. Important consideration for interventio...
TASC classification
Standardized system for categorizing peripheral arterial disease lesion complexity to guide treatment selection between...
thromboangiitis obliterans
Inflammatory vascular disease primarily affecting small and medium arteries of the extremities, strongly associated with...
time-of-flight
MR angiography technique that creates vascular contrast based on blood flow without requiring contrast injection.
TIMI flow grade
Standardized angiographic classification system for assessing coronary blood flow from 0 (no flow) to 3 (normal flow).
transcranial Doppler
Non-invasive ultrasound technique for assessing intracranial arterial blood flow velocities through temporal bone acoust...
vasospasm
Abnormal constriction of arterial vessels, commonly occurring after subarachnoid hemorrhage. Requires serial imaging to...
vessel caliber
The internal diameter measurement of a blood vessel, critical for assessing stenosis severity and hemodynamic significan...
vessel enhancement pattern
Characteristic contrast uptake behavior of arterial walls and luminal contents during imaging.
vessel reformation
Post-processing technique that creates curved planar images following the course of tortuous vessels.
vessel reformation artifact
Image distortions that occur during post-processing reconstruction of vascular datasets.
vessel tortuosity index
Quantitative measurement of arterial curvature used to assess vessel morphology objectively.
vessel wall enhancement
Abnormal uptake of contrast agent by the arterial wall indicating inflammation, infection, or other pathological process...