Articles
Articles are a collaborative effort to provide a single canonical page on all topics relevant to the practice of radiology. As such, articles are written and continuously improved upon by countless contributing members. Our dedicated editors oversee each edit for accuracy and style. Find out more about articles.
66 results found
Article
Pulmonary artery catheter
Pulmonary artery catheters (PAC or Swan-Ganz catheters) are balloon flotation catheters that are inserted into the pulmonary arteries. They can be inserted simply, quickly, with little training and without fluoroscopic guidance at the bedside, even in the seriously ill patient.
Usage
Historica...
Article
Charles T Dotter
Charles T Dotter (1920-1985) is often considered the father of interventional radiology who in 1964 performed the very first peripheral angioplasty, and made many other major contributions in this field.
Early life
Charles Theodore Dotter was born in Boston on 14 June 1920. He graduated with a...
Article
Adrenal vein sampling
Adrenal vein sampling (AVS) is a procedure where blood is collected from the adrenal veins via catheter to confirm autonomous hormone production, if it is unilateral or bilateral, and to guide further treatment 1. If unilateral, the adrenal gland can be removed by surgery; thus curing secondary ...
Article
Large vessel occlusion
Large vessel occlusion (LVO), also termed proximal large vessel occlusion (PLVO), describes occlusion of a proximal and large-sized intracranial artery resulting in impending acute ischemic stroke. The definition of large vessel occlusion varies significantly among clinical trials of endovascula...
Article
Medium vessel occlusion
Medium vessel occlusion (MeVO), also termed distal medium vessel occlusion (DMVO), describes occlusion of a medium-sized intracranial artery resulting in impending acute ischemic stroke.
Definition
One consensus definition of ‘medium vessel’ suggests intracranial arteries with a luminal diamet...
Article
Angioplasty
Angioplasty, also called balloon angioplasty or percutaneous transluminal angioplasty (PTA), is a minimally invasive interventional procedure in which an inflatable balloon-tipped catheter is introduced through the skin into the vascular lumen to open a stenotic segment of the vessel. Angioplast...
Article
Modified treatment in cerebral infarction (mTICI) score
The modified treatment in cerebral infarction (mTICI) score was developed from the original thrombolysis in cerebral infarction (TICI) scale by a consensus group in 2013 1. The recommendations included a name change to better reflect the increasing use of endovascular clot retrieval for ischemic...
Article
Cauldwell classification
Cauldwell classification is a commonly used classification 4 in assessing bronchial artery branching patterns.
Classification
The bronchial artery branching pattern is classified into four types based on the number of intercostobronchial trunks (ICBT) - that give rise to the right bronchial ar...
Article
Endovascular aneurysm repair
Endovascular aneurysm repair (EVAR) was first pioneered in the early 1990s. Since then, the technology of the devices has rapidly progressed, and EVAR is now widely used to treat thoracic and abdominal aortic aneurysms (AAA).
The advantages of endovascular repair over open repair are that it is...
Article
Uterine artery embolization
Uterine artery embolization (UAE) is an interventional radiological technique to decrease the arterial supply to the uterus and is performed for various reasons.
History
Uterine artery embolization has been practised for more than 20 years for controlling post-partum hemorrhage.
The technique...
Article
Central venous catheter
Central venous catheters (CVC), also known as central venous lines (CVL), refer to a wide range of catheters that are inserted so that their distal tips lie in a central vein. Central venous access devices can broadly be divided into four categories. They may be inserted by medical, surgical, an...
Article
Clot meniscus sign (angiography)
The clot meniscus sign, or simply the meniscus sign, is a radiological sign appreciated on digital subtraction angiography in the setting of endovascular clot retrieval for acute ischemic stroke caused by large vessel occlusion.
The sign describes the angiographic appearance of the proximal occ...
Article
Varicocele
Varicocele is the dilatation of the pampiniform plexus of veins, a network of many small veins found in the male spermatic cord. It is the most frequently encountered mass of the spermatic cord.
Epidemiology
The estimated incidence is at ~15% of the general male population and ~40% of subferti...
Article
Balloon-occluded retrograde transvenous obliteration
Balloon-occluded retrograde transvenous obliteration (BRTO) is a technique used by interventional radiologists in the treatment of gastric varices, particularly those with prominent infra-diaphragmatic portosystemic venous shunts (e.g. gastro-renal and gastro-caval shunts).
The technique is mor...
Article
Tandem lesion (cerebrovascular)
Tandem lesion, or tandem occlusion, is a term used in cerebrovascular imaging and intervention to refer to the simultaneous presence of high-grade stenosis or occlusion of the cervical internal carotid artery and thromboembolic occlusion of the intracranial terminal internal carotid artery or it...
Article
Peripherally inserted central catheter
Peripherally inserted central catheters (PICCs), often incorrectly tautologically termed PICC lines, are a type of central venous catheter predominantly used amongst oncology patients and those with chronic diseases (e.g. cystic fibrosis).
They offer the ability to have long-term central venous...
Article
Thrombolysis in cerebral infarction (TICI) scale
The thrombolysis in cerebral infarction (TICI) grading system was described in 2003 by Higashida et al. 1 as a tool for determining the response of thrombolytic therapy for ischemic stroke. In neurointerventional radiology it is commonly used for patients post endovascular revascularization. Lik...
Article
Expanded treatment in cerebral infarction (eTICI) score
The expanded treatment in cerebral infarction (eTICI) score is modified from the modified treatment in cerebral infarction (mTICI) and thrombolysis in cerebral infarction (TICI) scales. It was published by the HERMES investigators in 2019 1.
Using modified Rankin scale (mRs) shift at 90 days as...
Article
Needle gauge system
The needle gauge system, often called just the Gauge or G, is an internationally-used scale for sizing needles. It was adopted from pre-existing gauges which were used in industry to size metal wire.
In contradistinction to the French scale, the other well-known sizing system, which is a metric...
Article
Coronary Artery Disease - Reporting and Data System
The Coronary Artery Disease - Reporting and Data System (CAD-RADS) is a standardized method for reporting and communicating coronary CT angiography findings and serves as a clinical decision support tool to guide subsequent patient management.
History and etymology
The system was created by a ...
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