Articles
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34 results found
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
Basilar artery aneurysm
Basilar artery aneurysms are less common than anterior circulation aneurysms, and rupture less frequently, but their critical location necessitates careful evaluation.
Unruptured basilar artery aneurysms occurs in 3% of all intracranial aneurysms 4.
Radiographic features
CT
may present as ...
Article
Fluoroscopic myelography
Fluoroscopic myelography is a technique that allows the visualisation of the theca by the introduction of contrast medium into the CSF. This is usually accomplished by a lumbar puncture, or less commonly a suboccipital puncture.
The patient can then be tilted and rotated to cause the contrast, ...
Article
Transforaminal epidural steroid injection
Transforaminal epidural steroid injections (TFESI), also known as transforaminal nerve root injections or nerve root blocks, are performed for the treatment and diagnosis of radicular pain. They differ from selective nerve root blocks (SNRB), as the aim is to get an "epidural spill" and get the ...
Article
Flow-diverter stent
Flow-diverter stents are important devices in the management of intracranial aneurysms in both acute and elective settings, especially ones that are large, broad-necked, or fusiform.
Complications
Understanding the complication rates is important in obtaining informed consent from patients. In...
Article
Twig-like middle cerebral artery
Twig-like middle cerebral artery or rete mirabile anomaly describes a discontinuity of a single trunk of the middle cerebral artery with several small vessels reconstituting the artery and giving it a twig-like appearance. Distally, normal vascular anatomy of the MCA branches need to be present ...
Article
CT cisternography
Computed tomography (CT) cisternography is a minimally-invasive imaging technique used to visualise the intracranial CSF cisterns using iodinated contrast medium injected into the subarachnoid space.
Indications
detect and localise active CSF leaks through the skull base (CSF rhinorrhoea or CS...
Article
Epidural blood patch
Epidural blood patches are a treatment option for patients with craniospinal hypotension or post-dural puncture headaches in which small volumes of autologous blood are injected into a patient's epidural space to stop cerebrospinal fluid leak. The procedure can be done blind or under imaging (fl...
Article
Persistent primitive olfactory artery
A persistent primitive olfactory artery (PPOA) is a rare variant of the proximal anterior cerebral artery 1,2. It is proposed to be more prone to aneurysms due to its sharp hairpin-like turn. Embryologically, the persistent primitive olfactory artery is the rostral division of the primitive inte...
Article
Call-Fleming syndrome
Call-Fleming syndrome, also called Call syndrome, essentially synonymous with the more current term reversible cerebral vasoconstriction syndrome (RCVS), although it is felt to be a subset of the former by some, representing the idiopathic RCVS.
Call-Flemming syndrome is therefore characterise...
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 ischaemic stroke
vascu...
Article
Persistent communications between the carotid and vertebrobasilar arteries (mnemonic)
A mnemonic to recall the persistent communications between the anterior (carotid) and posterior (vertebrobasilar) systems is:
HOT Pepper
Knowledge of these anatomical variants is important to avoid confusion with pathology and to prevent inadvertent injury during surgery.
Mnemonic
H: hypoglo...
Article
Juan M Taveras
Juan M Taveras (1919-2002) was an Dominican neuroradiologist, who is remembered chiefly for his work in establishing neuroradiology as a separate subspecialty in the United States. He was the principal mover behind the founding of the American Society of Neuroradiology and its primary publicati...
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 ischaemic stroke.
Definition
One consensus definition of ‘medium vessel’ suggests intracranial arteries with a luminal diame...
Article
Lumbar interlaminar epidural injection
Lumbar interlaminar epidural injections are one of some possible spinal epidural injections. For an alternative approach for the same region, please refer to the article on lumbar transforaminal epidural injections.
Indications
Typically, epidural injections are performed in patients with rad...
Article
PHASES risk prediction score
The PHASES risk prediction score is a method of calculating the absolute 5-year risk of intracranial aneurysm rupture based on the data pooled from prospective cohort studies in the USA, Canada, Netherlands, Finland and Japan1. PHASES stands for: Population, Hypertension, Age, Size, Earlier suba...
Article
Endovascular clot retrieval (ECR)
Endovascular clot retrieval (ECR), also known as mechanical thrombectomy (MT) or endovascular thrombectomy (EVT), is increasingly performed in patients presenting with large vessel occlusion (LVO), especially those with a large ischaemic penumbra that is likely to progress to ischaemic stroke. T...
Article
O'Kelly-Marotta grading scale
The O'Kelly-Marotta (OKM) grading scale is a proposed method of assessing the degree of angiographic filling and contrast stasis in the setting of intracranial aneurysms treated by endovascular flow diversion. Taking into account the dynamic nature of the contrast stasis, it is designed for use ...
Article
Onyx
OnyxTM is the trade name for a liquid embolic agent used in interventional radiology for the occlusion of blood vessels in embolisation therapy. It is an elastic copolymer (ethylene vinyl alcohol copolymer (EVOH)), dissolved in dimethyl-sulfoxide (DMSO). Micronised tantalum powder is also added ...
Article
Antonio Egas Moniz
Antonio Egas Moniz (1874-1955) 1 was a pioneering Portuguese neurologist that is notable in radiology history for his development of cerebral angiography in 1927.
He is also known as the developer of prefrontal leucotomy (now better known as a lobotomy) for which he received a Nobel Prize in 1...