News | February 24, 2010

320-Slice CT Reduces Radiation Exposure by 90 Percent

February 24, 2010 - Researchers found that when using standard 64-detector row helical scanning as a benchmark, the effective radiation dose was reduced by 91 percent from 35.4 millisieverts (mSv) to 4.4 mSv using optimized 320-detector row volume scanning.

Researchers from Columbia University and the National Heart, Lung and Blood Institute conducted the study, published in the March issue of Radiology, in which they performed a coronary CT angiography exam, and determined that an imaging exam of the heart using the latest generation of CT technology exposes patients to as much as 91 percent less radiation than standard helical CT scanning.

Many coronary CT angiography exams are conducted on 64-detector row CT scanners, which can image four centimeters at a time. The latest generation of CT technology, a 320-detector row volume CT scanner, can image 16 centimeters - or the entire length of the heart - in a single rotation and within a single heartbeat.

In his study, Dr. Einstein and a team of researchers compared the radiation exposure incurred during a coronary CT angiography procedure using a 64-detector row helical scanning and volume scanning, using a 320-detector row volume CT scanner. Phantoms simulating the male and female body were imaged using six different scan modes.

Using standard 64-detector row helical scanning as the benchmark, the effective radiation dose was reduced by 91 percent from 35.4 millisieverts (mSv) to 4.4 mSv using optimized 320-detector row volume scanning.

"By imaging the entire heart in one piece, volume scanning eliminates artifacts due to seams or gaps between image sections," said Dr. Einstein. "Moreover, the x-ray tube is left on for only a brief duration, as little as .35 seconds."

According to Dr. Einstein, state-of-the-art CT technology emphasizes optimal image resolution with the ability to lower radiation dose through a variety of features and scan modes that adjust and modulate the dose based on the specific needs of the individual patient.

"As CT technology advanced from 16- to 64-slice capabilities, the radiation dose went up significantly," he said. "Today, technology development is going in the opposite direction, reducing radiation exposure."

Dr. Einstein emphasized that practitioners must pay careful attention to using the appropriate scan mode to obtain diagnostic information with the least amount of radiation exposure to the patient.

"Radiation Dose from Single-Heartbeat Coronary CT Angiography Performed with a 320-Detector Row Volume Scanner." Collaborating with Dr. Einstein were Carl D. Elliston, M.A., Andrew E. Arai, M.D., Marcus Y. Chen, M.D., Richard Mather, Ph.D., Gregory D. N. Pearson, M.D., Ph.D., Robert L. DeLaPaz, M.D., Edward Nickoloff, D.Sc, Ajoy Dutta, M.S., and David J. Brenner, Ph.D., D.Sc.

Disclosure: Dr. Mather is an employee of Toshiba America Medical Systems. Dr. Mather provided recommendations but had no control over the data included in the manuscript.

For more information: www.rsna.org

Related Content

Report Finds Identifying Patients for Lung Cancer Screening Not So Simple
News | Lung Cancer | June 18, 2018
New findings in the current issue of The American Journal of Managed Care suggest that getting the right patients to...
Weight-Bearing CT International Study Group Hosts  Scientific Session at AOFAS Conference
News | Computed Tomography (CT) | June 15, 2018
June 15, 2018 —The Weight-Bearing CT International Study Group will host a scientific session on the benefits of weig
Florida Hospital First in State to Adopt NeuroLogica's BodyTom Elite CT
News | Computed Tomography (CT) | June 14, 2018
June 14, 2018 — NeuroLogica, a subsidiary of Samsung Electronics Co.
Riverain Technologies Issued U.S. Patent for Vessel Suppression Technology
News | Computed Tomography (CT) | June 14, 2018
Riverain Technologies announced that the United States Patent and Trademark Office (USPTO) has awarded the company a...
360 Photos | 360 View Photos | June 14, 2018
This is a 360 degree image from the Canon Aquilion 64-slice...
American Society of Neuroradiology Honors Peter Chang with Cornelius G. Dyke Memorial Award
News | Neuro Imaging | June 13, 2018
Peter Chang, M.D., current neuroradiology fellow at UCSF and recently recruited co-director of the UCI Center for...
NewYork-Presbyterian Expands Mobile Stroke Treatment Unit Fleet

Image courtesy of NewYork-Presbyterian Hospital

News | Stroke | June 11, 2018
NewYork-Presbyterian, in collaboration with Weill Cornell Medicine, Columbia University Irving Medical Center and the...
Latest additions to Somatom go. CT platform address advanced clinical fields and applications, including cardiology, CT-guided intervention and dual energy CT. How to lower radiation dose from Computed tomography scanners using ned technology.

Latest additions to Somatom go. CT platform address advanced clinical fields and applications, including cardiology, CT-guided intervention and dual energy CT.

Feature | Computed Tomography (CT) | June 04, 2018 | By Melinda Taschetta-Millane
Recent studies show a rapid increase in patient radiation exposure mainly due to increased use of medical imaging, pa
Lung Decision Precision
News | Lung Cancer | June 04, 2018
For smokers and former smokers, the threat of lung cancer always lurks in the shadows.
American Cancer Society Updates Colorectal Cancer Screening Guideline
News | Colonoscopy Systems | May 30, 2018
An updated American Cancer Society guideline says colorectal cancer screening should begin at age 45 for people at...
Overlay Init