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.
248 results found
Article
Peritoneal dialysis catheter
A peritoneal dialysis catheter is a flexible tube designed for peritoneal dialysis, the most well-known and widely-used being the Tenckhoff catheter.
From an MRI perspective, the Tenckhoff catheter has an extraperitoneal tungsten tip which is MRI-compatible, however, it will cause some suscept...
Article
Percutaneous transhepatic cholangiography
Percutaneous transhepatic cholangiography (PTC) is a radiographic technique employed in the visualization of the biliary tree and can be used as the first step in a number of percutaneous biliary interventions (e.g. percutaneous transhepatic biliary stent placement)
Indications
Purely diagnost...
Article
Brachytherapy
Brachytherapy, also known as sealed source radiotherapy or endocurietherapy, is a form of radiotherapy where a radioactive source is placed, under the guidance of imaging, within or next to the area requiring treatment. This provides localized targeted internal radiation.
Brachytherapy has been...
Article
Long head of biceps brachii tendon sheath injection (technique)
Long head of biceps brachii (LHB) tendon sheath injections under ultrasound guidance ensure accurate delivery of injectate, which is important as these injections are often performed for diagnostic purposes.
Indications
pain
diagnostic injection
alternative access to the glenohumer...
Article
Glenohumeral joint hydrodilatation
Glenohumeral joint (shoulder) hydrodilatation or tension arthrography is an established treatment for adhesive capsulitis of the shoulder (frozen shoulder) and can be performed using a variety of modalities.
Indications
adhesive capsulitis of the shoulder
Contraindications
anticoagulatio...
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
Cell block cytology
Cell block cytology is a technique used in cytopathology (in addition to smears) for evaluation of tissue from fine needle aspirations (FNA) or fluid aspirations.
Multiple different protocols exist for processing a cell block, but the fundamental principles are the same:
fragmentary bits of...
Article
Radial artery access
Radial artery access is a minimally invasive approach for vascular access in interventional procedures. This route has widely been adopted since it reduced significantly the transfemoral-related complications. It is the recommended access route by the European Society of Cardiology for angiograp...
Article
Gene expression classifier
A gene expression classifier (GEC) test is a developing technology in the analysis of indeterminate thyroid nodules, using cells from a fine needle aspiration. The most common commercially available GEC in the United States is known as AFIRMA.
The test is designed to use molecular markers to he...
Article
Liver and biliary interventional procedures
There is a wide range of liver and biliary interventional procedures, both diagnostic and therapeutic, most commonly using CT-guidance or ultrasound-guidance.
Vascular Interventions:
transjugular intrahepatic portosystemic shunt (TIPS)
transjugular liver biopsy (TJLB)
Percutaneous...
Article
Pelvic phlebography
Pelvic phlebography or pelvic venography is an interventional procedure, in which the pelvic and gonadal veins are opacified to assess venous and collateral system anatomy for the diagnosis, treatment and pre-operative planning of pelvic vein pathology.
This procedure is usually performed at th...
Article
Cobra catheter
The Cobra tip shape configuration is used in selective angiographic catheters and designed for catheterization and subselection of vessels, in order to secure access, advance, exchange devices, or deliver contrast in the target vessel 1.
The Cobra tip-shape configuration is also used in urology...
Article
Ultrasound guided percutaneous drainage
Ultrasound guided percutaneous drainage is one form of image guided procedure, allowing minimally invasive treatment of collections that are accessible by ultrasound study.
It has several advantages and disadvantages over CT, which include:
Advantages
is a dynamic study, allowing greater p...
Article
CT guided percutaneous drainage
CT guided percutaneous drainage is one form of image-guided drainage, allowing minimally invasive treatment of collections, potentially anywhere in the body. Although less commonly used than ultrasound guidance, it is particularly valuable in gaining access to deeper or more posterior parts of t...
Article
T tube cholangiogram
T-tube cholangiograms are a fluoroscopic study performed in the setting of hepatobiliary disease. This technique has been largely superseded by MRCP and ERCP.
Typically a T-shaped tube is left in the common bile duct at the time of surgery (e.g. cholecystectomy) and allows for exploration of t...
Article
Subacromial bursal injection
Subacromial bursal corticosteroid injections, also known as subacromial-subdeltoid bursal injections, are used in patients with limited or no response to initial treatment with impingement syndrome, subacromial bursitis and/or rotator cuff disorders. Non-steroidal anti-inflammatory drugs (NSAIDs...
Article
Caudal epidural injection
Caudal epidural injections, or sacral hiatus epidural injections, are one of several possible spinal epidural injections.
Indications
Typically, epidural injections are performed in patients who are currently not surgical candidates. The caudal injection can be performed when patients are on ...
Article
Cervical interlaminar epidural steroid injection
Cervical interlaminar epidural steroid injections (ILESIs) are used to inject steroids in the epidural space and around the exiting nerve roots and are one of the two main spinal epidural injections; the other is cervical transforaminal epidural injections.
Indications
Typically performed in ...
Article
Magnetic resonance cholangiopancreatography (MRCP)
Magnetic resonance cholangiopancreatography (MRCP) is a non-invasive imaging technique to visualize the intra and extrahepatic biliary tree and pancreatic ductal system.
It can provide diagnostically-equivalent images to ERCP and is a useful technique in high risk patients to avoid significant ...
Article
Transcatheter arterial chemoembolisation
Transcatheter arterial chemoembolisation (TACE), also known as transarterial chemoembolisation, is a minimally-invasive method of administering chemotherapy directly to a liver tumor via a catheter under digital subtraction angiography (DSA). The chemoembolic agent may be delivered as a mixture ...
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