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.
More than 200 results
Article
Radial nerve block (ultrasound-guided)
Radial nerve blocks are a procedure for delivering anesthesia to the radial nerve territory either as a standalone blockade or in conjunction with a brachial plexus, ulnar or median nerve block.
Indications
association with median nerve block
radial tunnel syndrome
forearm and hand surgical ...
Article
Jugular venous catheters
The internal jugular vein is a preferred site for venous access for large lumen, long-term central venous catheters for chemotherapy, hemofiltration and plasma exchange. These are commonly referred to as (internal) jugular venous (IJV) catheters.
Typically, the right internal jugular is used as...
Article
Arthrogram (CT)
A CT arthrogram is a CT performed after a joint is injected with a solution containing iodinated contrast. They are not commonly abbreviated as CTA, which will be confused with CT angiography. An arthrogram also refers to the procedure of injecting a joint.
Indications
shoulder: instability, g...
Article
Arthrocentesis
Arthrocentesis or joint aspiration is an interventional procedure done for the collection of synovial fluid.
History
The existence of liquid inside joints was first mentioned in the Corpus Hippocraticum, later in the 16th century, Paracelsus coined the name “synovia” for synovial fluid.
Indic...
Article
Prostatic artery embolization
Prostatic artery embolization (PAE) is a minimally invasive procedure utilized to treat benign prostatic hyperplasia (BPH).
Indications
PAE has been used for controlling prostatic hemorrhage (such as that associated prostate cancer) since 1970. However, its use in the treatment of lower urina...
Article
Key figures in the history of radiology
In the history of radiology certain key figures stand out for their groundbreaking contributions to the establishment and development of radiology as a science, medical specialty and major advance in patient care. This list is by necessity arbitrary, although we (the editors) hope that the major...
Article
Endosaccular flow disruption devices
Endosaccular flow disruption devices, also simply known as flow disruptors, are used for the treatment of either ruptured or unruptured saccular, wide-neck, usually bifurcation as well as side-wall intracranial aneurysms. Their primary function is to stop blood from flowing into the aneurysm, al...
Article
Catheter-directed thrombolysis
Catheter-directed thrombolysis (CDT) is an endovascular approach to the treatment of acute iliofemoral deep vein thrombosis. It involves the administration of a lytic agent directly into a thrombus.
Indications
precise diagnosis of iliofemoral deep vein thrombosis
first episode of acute ili...
Article
Quadratus femoris injection (technique)
Quadratus femoris injections under image guidance ensure precise delivery of an injectate into the quadratus femoris muscle and ensure the sciatic nerve is avoided during the procedure. CT and ultrasound can be used, with ultrasound becoming more challenging in those with larger body habitus.
...
Article
Trocar technique
The trocar technique is a common technique for surgical procedures and interventional placement of tubes and drainage where instruments, tubes or drains are advanced to the target location through a fixed cannula or hollow tube namely the trocar, which acts as a portal in the process.
History
...
Article
Flush catheters
Flush catheters are a type of vascular catheter designed to allow high-flow injection rates (15 to 20 ml/s)1 into large vessels, for optimal aortograms and/or phlebograms.
The most common flush catheters are:
pigtail catheter
straight flush catheter
Tennis Racquet catheter
Properties
have ...
Article
Carotid arterial stenting
Carotid arterial stenting (CAS) is a minimally invasive endovascular interventional procedure that can potentially offer the same advantage as surgery (carotid endarterectomy).
Indications
Indications for carotid stenting are evolving with endarterectomy trials that evaluate the carotid stenos...
Article
Rotational vertebral artery occlusion syndrome
Rotational vertebral artery occlusion syndrome, also known as bow hunter's syndrome, is a rare form of vertebrobasilar insufficiency secondary to dynamic compression of the usually dominant vertebral artery.
Clinical features
Symptoms are usually transient and elicited upon rotation of the he...
Article
No-touch ablation technique
No-touch ablation techniques, using either microwave or radiofrequency to generate heating, refer to approaches whereby the probes are placed at multiple oblique sites tangential and adjacent to the targeted tumor (cf. probe placement centrally within the tumor).
Indications
For general indic...
Article
Left paramediastinal catheter position (differential)
When a central venous catheter that is supposed to terminate in the superior vena cava or right atrium is abnormally located to the left of the mediastinum and below the level of the brachiocephalic vein, a limited differential of left paramediastinal catheter position should be considered 1:
l...
Article
Intra-aortic balloon pump
Intra-aortic balloon pumps (IABP) are used in the intensive care setting to provide hemodynamic assistance to patients in cardiogenic shock.
Function and physiology
The device is comprised of a catheter introduced via a femoral artery sheath, which extends retrogradely to the proximal descendi...
Article
Tumor ablation
Tumor ablation, or image-guided tumor ablation, is the direct application of chemical or energy-based (i.e. thermal and non-thermal) treatments to cause local tumor destruction. Techniques include:
energy-based techniques
thermal ablation
radiofrequency ablation (RFA)
microwave ablation (MWA...
Article
Fine needle aspiration (FNA)
Fine needle aspiration (FNA) is a type of minimally-invasive tissue sampling. It often uses ultrasound as a targeting instrument, although CT and even MRI or fluoroscopy could potentially be used, depending on the situation. Imaging guidance is particularly useful when sampling deep or diffuse l...
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
Venous intravasation
Venous intravasation is the unintended introduction of radiographic contrast material into the local venous system. It is a well-recognized phenomenon during retrograde urethrograms 1,2 and hysterosalpingograms (HSG), although can occur with other invasive procedures in the vicinity of venous pl...
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