- published: 19 Mar 2014
- views: 9952
CT pulmonary angiogram (CTPA) is a medical diagnostic test that employs computed tomography to obtain an image of the pulmonary arteries. Its main use is to diagnose pulmonary embolism (PE). It is a preferred choice of imaging in the diagnosis of PE due to its minimally invasive nature for the patient, whose only requirement for the scan is an intravenous line.
Modern MDCT (multi-detector CT) scanners are able to deliver images of sufficient resolution within a short time period, such that CTPA has now supplanted previous methods of testing, such as isotope scanning or direct pulmonary angiography, as the gold standard for diagnosis of pulmonary embolism.
The patient receives an intravenous injection of an iodine-containing contrast agent at a high-rate using an injector pump. Images are acquired with the maximum intensity of radio-opaque contrast in the pulmonary arteries. This can be done using bolus tracking.
A normal CTPA scan will show the contrast filling the pulmonary vessels, appearing as bright white. Any mass filling defects, such as an embolus, will appear dark in place of the contrast, filling/blocking the space where blood should be flowing into the lungs.
Black and white is a form of visual representation that does not use color.
Black and white may also refer to:
Step by step tutorial on how to interpret a CT Pulmonary Angiogram (aka CTPA or PE Study). By Radiology Resident PGY3 Sarel Gaur MD, SUNY Stony Brook U. Hospital.
Raymond L. Benza, MD, of Allegheny Health Network, Pittsburgh, reviews the respective roles of V/Q scans and CTPA in CTEPH.
Radiologist vs Intern
The City Part of Town - There is a new and exciting place, where people can gather to shop, experience and grow. This is an all new food and nightlife district, this is CtPa Town. https://en.wikipedia.org/wiki/The_City_Part_of_Town
How to diagnose a pulmonary embolism. A step by step description of the findings of two patients with positive findings on CT Pulmonary Angiogram (CTPA or PE Study). by Sarel Gaur MD PGY3 Radiology, SUNY Stony Brook Hospital.
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