Radiologists find a technique to significantly reduce patient radiation dose during CT angiography

Sep 21, 2009

Radiologists have discovered that prospective electrocardiogram (ECG) gating allows them to significantly reduce the patient radiation dose delivered during computed tomography (CT) angiography, a common noninvasive technique used to evaluate vascular disease, according to a study published in the October issue of the American Journal of Roentgenology (AJR).

The study, performed at the Medical College of Wisconsin, compared the use of retrospective ECG gating (when the radiation beam is on constantly) and prospective ECG gating (when the is turned on only intermittently) during CT angiography.

Forty patients were evaluated using retrospective gating and 40 more were evaluated using prospective gating. "In comparison, image quality was equivalent," said W. Dennis Foley, MD, lead author of the study. "In regards to radiation dose, the dose was three times higher with retrospective gating," he said. The radiation dose using prospective gating was approximately 14 mSv compared to 43.3 mSv using retrospective gating.

" continues to be a concern during CT procedures. However our study is significant because it shows radiologists are able to significantly decrease the radiation dose delivered to the patient during CT angiography," said Dr. Foley.

"Prospective ECG-gated is a technically robust, noninvasive imaging technique for the evaluation of vascular disease. It is safer than conventional angiography and the patient benefits from having it done intravenously rather than through the arteries," he said.

Source: American Roentgen Ray Society

Explore further: Penis transplant offers hope to victims of botched circumcisions

Related Stories

Radiation dose drastically reduced during whole chest MDCT

Jun 24, 2009

Emergency physicians who evaluate patients with non-specific chest pain using whole chest multi-detector CT (MDCT) combined with retrospective electrocardiogram (ECG) gating can reduce the patient radiation dose by 71% using ...

Recommended for you

Game shows mosquito's-eye view of malaria

Apr 24, 2015

A new game about the life cycle of malaria that can be played on Android smartphones has been created by an Oxford University developer, based on malaria research at the University's Nuffield Department of ...

DMV program can generate additional organ donors

Apr 23, 2015

(HealthDay)—A brief, web-based training program for department of motor vehicles (DMV) employees that educates them about organ and tissue donation can increase the likelihood of customers registering as ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.