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.
163 results found
Article
Hickman catheter
Hickman catheters (or Hickman lines) are a type of tunneled central venous access line.
Radiographic features
Hickman catheters are typically inserted into either jugular vein, and the proximal tubing is tunneled through the subcutaneous tissues to a skin incision on the chest. The distal part...
Article
Remasking
Remasking is a post-processing technique used to improve misregistration artifact in digital subtraction angiography (DSA), where a frame taken after patient motion is selected as the new mask image for subtraction.
In digital subtraction angiography, misregistration (improper image registratio...
Article
Antegrade ureteric stent
Antegrade ureteric stents are performed under fluoroscopic guidance, typically by an interventional radiologist or urologist. It is performed via percutaneous access from the kidney. It is usually performed using the access from a prior percutaneous nephrostomy, a so-called two-step procedure, a...
Article
Metallic ureteric stent
Metallic ureteric stents are a type of ureteric stent developed to offer improved symptomatic relief of obstruction when compared to polymeric (polyurethane) stents. They are often used in patients with chronic malignant ureteric obstructions who require placement of long-term ureteral stents to...
Article
Renal sympathetic denervation
Renal sympathetic denervation (RSDN), also known as renal denervation, is an interventional procedure that uses radiofrequency ablation to destroy the nerve endings in the wall of the renal arteries. Endovascular (trans-catheter) techniques are an alternative to surgical sympathectomy.
Indicat...
Article
Hepatic chemosaturation
Hepatic chemosaturation is a percutaneous technique used to locally treat unresectable hepatic metastases in patients without systemic disease.
Technique
The key to this technique is isolating the blood supply to the liver. This is achieved by:
closure of the gastro-duodenal artery by coiling...
Article
Groshong catheter
Groshong catheters are a type of central venous catheter, which are placed under direct fluoroscopic visualization in an angiography suite. They can be tunneled or non-tunneled and are similar to a Hickman catheter, with the main difference being that Groshong catheters have a three-way valve at...
Article
Radioembolization
Radioembolization is the delivery of radioactive microspheres to cancers using an endovascular approach. It is often performed as an outpatient procedure.
Indications
hepatocellular carcinoma 2
hepatic metastases from colorectal carcinoma
Contraindications
Absolute contraindications
exces...
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
Arthrogram (anesthetic)
An arthrogram injection is a procedure in which a solution is administered into a joint under imaging guidance. These procedures are more accurately named direct arthrogram injections, although they are routinely known as arthrograms. Fluoroscopy, ultrasound, and CT can be used for image guidanc...
Article
Gastrointestinal stents
Gastrointestinal (GI) stents are increasingly used to treat obstruction of the GI tract, most commonly due to malignancy.
Types of stent
esophageal stent
gastric stent
duodenal stent
enteric stent
colorectal stent
History and etymology
Somewhat surprisingly the word 'stent' is actually a...
Article
Post-thrombotic syndrome
Post-thrombotic syndrome (PTS) is a syndrome of chronic venous insufficiency following deep vein thrombosis (DVT) due to valvular incompetence, which results in chronic reflux and chronic venous hypertension.
Epidemiology
PTS is a common complication following extensive DVT of the limbs. Up to...
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
Femoral artery pseudoaneurysm
Femoral artery pseudoaneurysms are usually iatrogenic, as the femoral artery is the vessel of choice for most endovascular arterial interventions.
Pathology
Etiology
iatrogenic
anticoagulation therapy
inadequate compression following femoral arterial puncture for endovascular intervention
...
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
TIPS evaluation
TIPS evaluation is useful to ensure that a transjugular intrahepatic portosystemic shunt (TIPS) is working properly and that no stenosis has occurred within the stent. Ultrasound is often used as a first-line modality.
Radiographic features
Ultrasound
The normal TIPS should show color Doppler...
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
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
Endovascular aneurysm sealing system (EVAS)
Endovascular aneurysm sealing system (EVAS) was developed with the intention to expand beyond the anatomic limitations of endovascular aneurysm repair (EVAR) devices, as well as to decrease the rates of re-intervention secondary to graft migration and type II endoleaks.
EVAS was designed by End...
Article
Interventional procedure article structure
Interventional procedure articles necessarily require a different structure to other articles. It is important for them to have a consistent structure to maintain uniformity across the site. The suggested structure and headings (and heading size) are as follows:
================================...
Unable to process the form. Check for errors and try again.