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
Heimlich valve
The Heimlich valve, also known as the flutter valve, is a unidirectional valve to ensure that gas/fluid drained from the pleural space cannot flow back in.
The Heimlich valve is cheap, easy to use, and does not require clamping unlike 'traditional' thoracostomy drainage tubes. Suction can stil...
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
Percutaneous liver tumor ablation
Percutaneous liver tumor ablation techniques are well-established and effective therapeutic alternatives for the treatment of primary and secondary liver tumors. Hepatocellular carcinoma (HCC) and colorectal oligometastatic disease are the most common indications. There are specific indications ...
Article
Onyx
OnyxTM is the trade name for a liquid embolic agent used in interventional radiology for the occlusion of blood vessels in embolization therapy. It is an elastic copolymer (ethylene vinyl alcohol copolymer (EVOH)), dissolved in dimethyl-sulfoxide (DMSO). Micronised tantalum powder is also added ...
Article
Sven-Ivar Seldinger
Sven-Ivar Seldinger (1921-1998), a Swedish radiologist, is primarily remembered for the invention of his revolutionary eponymous technique.
Early life
Sven-Ivar Seldinger was born in Mora, Dalarna, Sweden on 19 April 1921 5. He attended medical school at the Karolinska Institute in Stockholm ...
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...
Article
Nephrostomy
Nephrostomy is a common urologic or interventional radiology procedure in which a tube/catheter is introduced into the renal collecting system (usually the renal pelvis).
Nephrostomies can either be
"open" nephrostomy: after a urological surgical procedure, such as a UPJ stone removal
these t...
Article
Urethral clamps
Various radiological and surgical instruments, including urethral clamps, have been developed to try to improve retrograde/ascending urethrogram (RUG/ASU) and voiding cystourethrogram (VCUG) technique in males. These are very rarely (if ever) used anymore.
Brodny clamp
This device has a metall...
Article
Amniocentesis
Amniocentesis, also known as amniotic fluid testing or AFT, is a diagnostic or therapeutic medical procedure primarily used in prenatal diagnosis of chromosomal abnormalities and fetal infections.
A small amount of amniotic fluid (15-20 ml), which contains fetal tissue, is extracted from the am...
Article
Interventional radiology in practice
Interventional radiology procedures within medical imaging span multiple subspecialties and modalities. This is a collection of articles exploring indications, techniques and practice applications of interventional procedures within radiology.
In pediatrics, the most common interventional proce...
Article
Gluteus minimus/medius calcific tendinopathy barbotage (technique)
Gluteus minimus/medius calcific tendinopathy barbotage is a procedure performed under ultrasound guidance with the aim of reducing the bulk of tendon calcification, in a similar fashion to that performed for rotator cuff calcific tendinopathy.
Indications
gluteus minimus/medius tendon calcifi...
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
DNB in endovascular and interventional radiology
Diplomate of National Board (DNB) in endovascular and interventional radiology is a postdoctoral super specialty programme in India.
eligibility
postgraduate degree in radiology (MD/DNB)
National Eligibility cum Entrance Test (Super Speciality courses) (NEETSS)/Common Entrance Test (Super S...
Article
Chorionic villus sampling
Chorionic villus sampling (CVS) is an antenatal procedure for prenatal diagnosis of chromosomal or genetic disorders in the fetus. It entails getting a sample of the chorionic villus (placental tissue) and testing it.
A transabdominal or transcervical approach is selected depending on the posit...
Article
Angioleiomyoma
Angioleiomyomas, also known as angiomyomas or vascular leiomyomas, are benign pericytic or perivascular soft tissue tumors.
Epidemiology
Angioleimyomas are rare and have been observed in a wide age range with a peak in the 4th to 6th decades of life. Generally, women are more commonly affect...
Article
Z-track technique for paracentesis
The Z-track technique is used for paracentesis. It produces a non-linear track between the dermis and the peritoneum, and this serves to decrease the chance of ascitic fluid leakage through the track.
Procedure
Instead of directly sticking the access needle from the skin surface into the perit...
Article
Endoleak
Endoleaks are characterized by persistent blood flow within the aneurysm sac following endovascular aneurysm repair (EVAR). Normally the aortic stent-graft used for EVAR excludes the aneurysm from the circulation by providing a conduit for blood to bypass the sac.
Epidemiology
An endoleak is a...
Article
CT guided thoracic biopsy
CT guided thoracic biopsy is usually performed for the diagnosis of suspicious lung, pleural, or mediastinal lesions. It can be performed as an outpatient procedure where patient monitoring and complications support are available. A small percentage of lung and pleural biopsies may be performed...
Article
Urethrography
Urethrography refers to the radiographic study of the urethra using iodinated contrast media and is generally carried out in males.
Terminology
When the urethra is studied with instillation of contrast into the distal/anterior urethra it has been referred to as:
retrograde urethrography (RUG)...
Article
Ulnar nerve block (ultrasound-guided)
Ulnar nerve blocks are an approach for delivering anesthesia to the ulnar nerve territory either as a standalone blockade or combined with brachial plexus, radial or median nerve block.
Indications
burns involving tissue in the ulnar nerve territory
rescue analgesia for failed brachial plexus...
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