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 edited by countless contributing members over a period of time. A global group of dedicated editors oversee accuracy, consulting with expert advisers, and constantly reviewing additions.

8 results found
Article

Cardiac blood pool scan

A multi-gated (MUGA) cardiac blood scan scan is a common study performed in patients who are receiving potentially cardiotoxic chemotherapy.  Indications acute myocardial infarction (AMI) coronary artery disease (CAD) evaluation after coronary artery bypass graft surgery cardiomyopathy / my...
Article

Contrast media extravasation

Contrast media extravasation (CMEV) refers to the leakage of contrast media from the normal intravascular compartment into surrounding soft tissues; It is a well-known complication of contrast-enhanced CT scanning. It can also occur in MRI studies, but the complications are rare given the low vo...
Article

CT abdomen (summary)

CT abdomen is an increasingly common investigation that is used to help make diagnoses of a broad range of pathologies. A CT abdomen in its simplest form is a CT from diaphragm to symphysis performed 60 seconds after pump-injection of iodinated contrast intro a peripheral vein. However, dependin...
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

Rapid ultrasound in shock

The Rapid ultrasound in shock (RUSH) protocol is a structured point-of-care ultrasound examination performed at the time of presentation of a shocked patient. It is a more detailed and longer exam than the FAST scan, with the aim to differentiate between hypovolemic, cardiogenic, obstructive and...
Article

Renal arterial resistive index

The renal arterial resistive index (RI) is a sonographic index to assess for renal arterial disease. It is measured as  RI = (peak systolic velocity - end diastolic velocity ) / peak systolic velocity the normal value is ≈ 0.60 with 0.70 being around the upper limits of normal Technique M...
Article

Tardus parvus

Tardus parvus refers to a particular pattern of Doppler ultrasound spectral waveform. It commonly occurs downstream from significant arterial stenosis, and in particular is useful in assessing for renal artery stenosis.  Radiographic features tardus: prolonged systolic acceleration (i.e. slow ...
Article

Triple-rule-out CT

Triple-rule-out CT (TRO CT) angiography may be ordered in the setting of acute chest pain to examine the thoracic aorta and the coronary and pulmonary arteries. The protocol helps exclude life-threatening causes of acute chest pain, especially if atypical, or if alternative causes to acute coron...

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