Items tagged “angiography”

7 results found
Article

Renal artery occlusion (acute)

Renal artery occlusion can happen acutely due to in-situ thrombus, embolism, or dissection. Unless immediately treated, it can lead to renal infarction 1. Epidemiology The condition is more common in the elderly, however, it may be seen in a younger age group if they have risk factors (describ...
Article

Contrast-enhanced MR angiography

Contrast-enhanced MR angiography (MRA) is a technique involving 3D spoiled gradient-echo (GE) sequences, with the administration of gadolinium-based contrast agents (GBCA). It can be used to assess vascular structures of almost any part of the body. Its key features are: T1 weighted spoiled gra...
Article

Non contrast enhanced MR angiography

Non-contrast-enhanced MR angiography is a type of MR angiography that does not use gadolinium contrast to image the blood vessels, unlike the contrast enhanced MR angiography. Techniques The earliest method that is used to image the blood vessels is by exploiting the inflow effect of the blood...
Article

Fractional flow reserve

Fractional flow reserve (FFR) is a technique to evaluate the hemodynamic relevance of coronary artery stenoses 1,2. It is defined as "the ratio of maximal flow achievable in the stenotic coronary artery to the maximal flow achievable in the same coronary artery if it was normal" 1. Fractional f...
Article

Renal artery pseudoaneurysm

Renal artery pseudoaneurysms are uncommon vascular finding, with the majority occuring after a renal intervention. Pathology A renal artery pseudoaneurysm differs from a renal artery true aneurysm (as might occur in fibromuscular dysplasia) in that it does not involve all three layers of the a...
Article

Floating viscera sign

The floating viscera sign is an angiographic sign that occurs when there is visualization of branches of the abdominal aorta (e.g. celiac axis, superior mesenteric artery, and renal arteries) during aortography with little or no visualization of the aortic lumen. The floating viscera sign indic...
Article

Cerebral angiography

Cerebral angiography is an interventional procedure for the diagnosis and/or treatment of intracranial pathology. Indications Cerebral digital subtraction angiography (DSA) is indicated in a variety of settings including: diagnosis and treatment of: aneurysms 1 acute ischemic stroke vascul...

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