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

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 glenohumeral join...
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 anticoagulation/c...
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 ti...
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 interven...
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 prec...
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 th...
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 not surgical candidates. The caudal injection can be performed when patients are on anticoagul...
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 ...
Article

Splenic ultrasound

Splenic ultrasound is a non-invasive diagnostic imaging method that uses high-frequency sound waves to visualize and assess the size, shape, structure, and potential abnormalities of the spleen. Indication trauma: splenic injuries resulting from accidents, sports injuries, or any other form of...
Article

Knee joint injection (technique)

Knee joint injections under image guidance ensure precise delivery of an injectate into the knee joint. Either fluoroscopy, ultrasound or CT can be used to guide and administer injectates, which may be diagnostic (e.g. anesthetic), "therapeutic" (e.g. anesthetic/steroids, PRP), or for CT or MR a...

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.