Featured Research

from universities, journals, and other organizations

Patient' Exposure To Radiation Significantly Lower When Using New Cardiac CT Technique

Date:
April 11, 2008
Source:
American Roentgen Ray Society
Summary:
A new cardiac CT technique, prospective gated 64-channel cardiac CT, has a significantly lower radiation dose and produces CT coronary angiograms with better image quality when compared with the standard retrospective ECG gating, according to a recent study.

A new cardiac CT technique, prospective gated 64-channel cardiac CT, has a significantly lower radiation dose and produces CT coronary angiograms with better image quality when compared with the standard retrospective ECG gating, according to a recent study conducted by researchers at the University of Washington in Redmond, WA.

Related Articles


"Standard retrospective gated cardiac CT uses continual scanner table motion and spiral acquisition with overlap of the radiation beam on each spiral - so each piece of tissue gets scanned 4 or 5 times. Retrospective gated CT scans with a broader beam and only one rotation per table location; the table is not moving during scanning and each piece of tissue gets scanned only once. Rather, the table moves every other heartbeat, when the radiation beam is turned off," said William Shuman, MD, lead author of the study. "With retrospective gating, the X-ray beam is on all throughout the entire scan. With prospective gating, the beam is on for only 25% of the scan-like a snapshot," he said.

The researchers compared 50 CT coronary angiograms using both the new prospective gated 64-channel cardiac CT and standard retrospective ECG gating in patients matched for body size, heart rate, diagnosis, age, and sex. The researchers noted image quality and evaluated patient radiation dose.

"We image the coronary arteries in segments," said Dr. Shuman."Of the 621 segments we viewed on prospective gated 64-channel cardiac CT, we rated 70% as excellent, 29% as good, and 1% as adequate. On retrospective ECG, 632 segments were rated with 54% noted as excellent, 36% as good, and 10% as adequate. Radiation dose for the prospective gated CT exams was 76% lower than the standard retrospective technique," he said.

"While cardiac CT technology has made the easy imaging of the coronary arteries possible in only 5 seconds and without catheters, there is substantial radiation involved with the usual retrospective CT technique," said Dr. Shuman. "This new prospective technique results in the same image quality but with a 76% lower radiation dose. This means cardiac CT may be a reasonable test in more patients to find coronary artery plaque or congenital heart disease," he said.

"With this new technique, very useful information about a patient's heart and coronary arteries is quickly available with much less radiation," said Dr. Shuman.

The full results of this study will be presented on Wednesday, April 16, 2008 during the American Roentgen Ray Society's annual meeting in Washington, DC.


Story Source:

The above story is based on materials provided by American Roentgen Ray Society. Note: Materials may be edited for content and length.


Cite This Page:

American Roentgen Ray Society. "Patient' Exposure To Radiation Significantly Lower When Using New Cardiac CT Technique." ScienceDaily. ScienceDaily, 11 April 2008. <www.sciencedaily.com/releases/2008/04/080411150911.htm>.
American Roentgen Ray Society. (2008, April 11). Patient' Exposure To Radiation Significantly Lower When Using New Cardiac CT Technique. ScienceDaily. Retrieved January 30, 2015 from www.sciencedaily.com/releases/2008/04/080411150911.htm
American Roentgen Ray Society. "Patient' Exposure To Radiation Significantly Lower When Using New Cardiac CT Technique." ScienceDaily. www.sciencedaily.com/releases/2008/04/080411150911.htm (accessed January 30, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Friday, January 30, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Oxfam Calls for Massive Aid for Ebola-Hit West Africa

Oxfam Calls for Massive Aid for Ebola-Hit West Africa

AFP (Jan. 29, 2015) Oxfam International has called for a multi-million dollar post-Ebola "Marshall Plan", with financial support given by wealthy countries, to help Guinea, Sierra Leone and Liberia to recover. Duration: 01:10 Video provided by AFP
Powered by NewsLook.com
Are We Winning The Fight Against Ebola?

Are We Winning The Fight Against Ebola?

Newsy (Jan. 29, 2015) The World Health Organization announced the fight against Ebola has entered its second phase as the number of cases per week has steadily dropped. Video provided by Newsy
Powered by NewsLook.com
Calif. Health Officials Campaign Against E-Cigarettes

Calif. Health Officials Campaign Against E-Cigarettes

Newsy (Jan. 29, 2015) The California Health Department says e-cigarettes are a public health risk for both smokers and those who inhale e-cig smoke secondhand. Video provided by Newsy
Powered by NewsLook.com
Measles Scare Sends 66 Calif. Students Home

Measles Scare Sends 66 Calif. Students Home

AP (Jan. 29, 2015) Officials say 66 students at a Southern California high school have been told to stay home through the end of next week because they may have been exposed to measles and are not vaccinated. (Jan. 29) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins