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: Experts: Chopin's heart shows signs of TB

add to favorites email to friend print save as pdf

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

Experts: Chopin's heart shows signs of TB

1 hour ago

Polish medical experts say that the preserved heart of 19th century composer Frederic Chopin shows signs of tuberculosis and possibly some other lung disease.

The argument in favor of doping

3 hours ago

Ahead of Friday's court ruling on whether ASADA's investigation into the Essendon Football Club was lawful, world leader in practical and medical ethics Professor Julian Savulescu, looks at whether there is a role for performance-enhancing ...

Errata frequently seen in medical literature

Sep 16, 2014

(HealthDay)—Errata, including those that may materially change the interpretation of data, are frequent in medical publications, according to a study published in the August issue of The American Journal of ...

User comments : 0