Navigation Links
New cardiac CT technology drastically reduces patient radiation exposure
Date:2/22/2010

OAK BROOK, Ill. In a new study published in the March issue of Radiology, researchers from Columbia University and the National Heart, Lung and Blood Institute have 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.

"Coronary CT angiography has generated great enthusiasm in recent years, due to its diagnostic accuracy in assessing patients with known or suspected coronary artery disease," said Andrew J. Einstein, M.D., Ph.D., assistant professor of clinical medicine in radiology and director of cardiac CT research at Columbia University Medical Center. "However, that enthusiasm has been tempered by concern about the potentially high radiation dose received by patients."

In CT, numerous x-ray beams and a set of x-ray detectors rotate around the patient, measuring the amount of radiation being absorbed in the body. At the same time, the exam table moves through the scanner allowing the x-ray beam to follow a helical or spiral path.

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 centimetersor the entire length of the heartin 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.


'/>"/>

Contact: Linda Brooks
lbrooks@rsna.org
630-590-7762
Radiological Society of North America
Source:Eurekalert

Related medicine news :

1. The ScottCare Corporation Completes Acquisition of Rozinn Electronics, a Leading Manufacturer of Cardiac Diagnostic Products
2. Corporate and Political PR Pro to Lead Sudden Cardiac Arrest Association
3. Family History Has Strong Effect on Cardiac Risk
4. American Heart Association Surgical Supplement Journal Report: Appropriate Hospital Discharge System Can Prevent Future Cardiac Events
5. Cardiac Science to Present at the UBS Global Life Sciences Conference
6. Cardiac Science Applauds Mass AED Training of Pittsburgh Educators
7. Guidelines help patients reduce risk of cardiac event before surgery
8. Cardiac Science Named to Deloittes Technology Fast 50 for Washington State
9. Cleveland Clinic and The Larry King Cardiac Foundation Partner to Provide Heart Surgery to Those in Need
10. Cardiac Science Releases New Cardiac Rehabilitation System
11. Cardiac Artery Trouble Boosts Family Heart Risk
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/24/2017)... ... 24, 2017 , ... “End Time GPS”: a dauntless and enlightened study ... Time GPS” is the creation of published author, Wesley Gerboth, a World War II ... and space-vehicle projects. Now, at age ninety-one, he shares the Wisdom God bestowed upon ...
(Date:3/24/2017)... ... , ... “The Communion of Saints: A Pastor’s Potpourri of ... across the United States. “The Communion of Saints” is the creation of ... congregations in seven states throughout his long career of devotion to the church. ...
(Date:3/23/2017)... ... March 23, 2017 , ... In 2016 the World ... that there could be four million Zika-related cases in the Americas within the next ... of US cases reported per year skyrocketing to an estimated 329,000. Yet, Zika, Lyme ...
(Date:3/23/2017)... , ... March 23, 2017 , ... The physicians of ... in the greater Houston Area. The new location is located at 2255 E. Mossy ... in Springwoods Village. This newest location will provide patients living in the north Houston ...
(Date:3/23/2017)... New Braunfels, TX (PRWEB) , ... March 23, 2017 , ... ... a new clinic, located at 960 Gruene Road in Building 2. The clinic is ... co-owner Dr. Andrew Bennett, PT, says opening the company’s second New Braunfels location brings ...
Breaking Medicine News(10 mins):
(Date:3/24/2017)... Research and Markets has announced the addition of the "Dental Implants ... ... for Dental Implants in US$ Million. The report provides separate comprehensive analytics ... , Europe , Asia-Pacific , ... Annual estimates and forecasts are provided for the period 2015 through 2022. ...
(Date:3/24/2017)... , March 24, 2017 FinancialBuzz.com News ... ... publisher of cannabis market research, the legal cannabis market is ... through 2021, despite conflicting signals from the current presidential administration. ... that the two biggest drivers of growth in this industry ...
(Date:3/24/2017)... Research and Markets has announced the addition of the "Deep ... to their offering. ... The Deep Learning: Drug Discovery and Diagnostics Market, 2017-2035 report examines ... deep learning solutions within the healthcare domain. Primarily driven by the ... solution to generate relevant insights from medical data. ...
Breaking Medicine Technology: