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Arterial Vascular Imaging Glossary

100 terms total — 24 showing — Last updated 15 Sep 2026

contrast nephropathy CIN

Intermediate Technical IVT

Acute kidney injury occurring after intravascular contrast agent administration.

Showing 73–96 of 100

resistivity index

Professional Technical IVT

Doppler parameter calculated from peak systolic and end-diastolic velocities to assess downstream vascular resistance an...

Technical Term Full entry →

run-off vessel

Intermediate Technical IVT

Distal arterial vessels that provide outflow from a more proximal arterial segment, particularly in the lower extremitie...

Technical Term Full entry →

runoff

Intermediate Technical IVT

Imaging evaluation of peripheral arteries from the aortoiliac region to the pedal vessels.

Technical Term Full entry →

runoff study

Intermediate Technical IVT

Angiographic examination of peripheral arteries from aorta to pedal vessels to assess patency throughout the arterial tr...

Imaging Procedure Full entry →

selective catheterization

Professional Technical IVT

Targeted placement of a catheter into a specific arterial branch for isolated contrast injection and imaging.

Technical Term Full entry →

Spetzler-Martin grading

Professional Technical IVT

Classification system for cerebral arteriovenous malformations based on size, eloquence of adjacent brain, and pattern o...

Classification System Full entry →

steal phenomenon

Professional Technical IVT

Retrograde blood flow pattern where blood is diverted from one vascular territory to supply another area of lower resist...

Technical Term Full entry →

stenosis

Intermediate Technical IVT

Abnormal narrowing of a blood vessel that restricts blood flow.

Technical Term Full entry →

string-of-beads sign

Intermediate Technical IVT

A characteristic angiographic appearance of alternating areas of stenosis and dilation resembling a beaded necklace.

Technical Term Full entry →

subclavian steal syndrome

Advanced Technical IVT

Vascular condition where proximal subclavian artery stenosis causes retrograde flow in the ipsilateral vertebral artery,...

Clinical Condition Full entry →

subintimal angioplasty

Advanced Technical IVT

Technique for crossing chronic total occlusions by creating a controlled dissection plane.

Technical Term Full entry →

tandem lesions

Intermediate Technical IVT

Multiple sequential stenotic lesions in the same arterial vessel or circulation. Important consideration for interventio...

Pathological Pattern Full entry →

TASC classification

Professional Technical IVT

Standardized system for categorizing peripheral arterial disease lesion complexity to guide treatment selection between...

Technical Term Full entry →

thromboangiitis obliterans

Professional Technical IVT

Inflammatory vascular disease primarily affecting small and medium arteries of the extremities, strongly associated with...

Clinical Condition Full entry →

time-of-flight

Advanced Technical IVT

MR angiography technique that creates vascular contrast based on blood flow without requiring contrast injection.

Technical Term Full entry →

TIMI flow grade

Intermediate Technical IVT

Standardized angiographic classification system for assessing coronary blood flow from 0 (no flow) to 3 (normal flow).

Technical Term Full entry →

transcranial Doppler

Intermediate Technical IVT

Non-invasive ultrasound technique for assessing intracranial arterial blood flow velocities through temporal bone acoust...

Technical Term Full entry →

vasospasm

Intermediate Technical IVT

Abnormal constriction of arterial vessels, commonly occurring after subarachnoid hemorrhage. Requires serial imaging to...

Clinical Condition Full entry →

vessel caliber

Intermediate Technical IVT

The internal diameter measurement of a blood vessel, critical for assessing stenosis severity and hemodynamic significan...

Technical Term Full entry →

vessel enhancement pattern

Intermediate Technical IVT

Characteristic contrast uptake behavior of arterial walls and luminal contents during imaging.

Technical Term Full entry →

vessel reformation

Advanced Technical IVT

Post-processing technique that creates curved planar images following the course of tortuous vessels.

Technical Term Full entry →

vessel reformation artifact

Advanced Technical IVT

Image distortions that occur during post-processing reconstruction of vascular datasets.

Technical Term Full entry →

vessel tortuosity index

Advanced Technical IVT

Quantitative measurement of arterial curvature used to assess vessel morphology objectively.

Technical Term Full entry →

vessel wall enhancement

Professional Technical IVT

Abnormal uptake of contrast agent by the arterial wall indicating inflammation, infection, or other pathological process...

Technical Term Full entry →
Showing 73–96 of 100

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