News | April 09, 2009

CCTA Dose Lowered in Triple Rule-Out

heart

April 9, 2009 -Physicians can dramatically reduce the radiation dose delivered to patients undergoing coronary CT angiography in a "triple rule-out" protocol by simply using tube current modulation, according to a study performed at Thomas Jefferson University Hospital in Philadelphia, PA. The study included 172 patients who were evaluated using coronary CT angiography without tube current modulation and 95 patients who were evaluated with tube current modulation. The effective radiation dose ranged between 9.9 and 31.3 mSv in patients without modulation; the dose ranged between 5.4 and 16.6 mSv in patients with modulation. "Image quality was comparable to when we didn't use tube current modulation," said Kevin M. Takakuwa, M.D., lead author of the study. "One of the major criticisms of the triple rule out coronary CT angiography study is the concern about the high amount of radiation given, which has been estimated by some to be as high as 30-40 mSv. Our study demonstrates that the radiation is a lot less, averaging less than 9 mSv when using tube current modulation. In addition, it uses less radiation than a nuclear stress test, a common alternative study to the triple rule-out cardiac CT," he said. "Cardiac CT in a "triple rule-out" protocol allows us to look for coronary artery disease, aortic dissections and pulmonary emboli. These are three potentially life-threatening causes of chest pain that we cannot afford to miss in the emergency room. When we perform this test on undifferentiated chest pain patients we are able to identify disease entities that cannot be made with nuclear stress testing. For example, we have diagnosed metastatic cancers, pulmonary embolism and pneumonia that would have been missed by stress testing alone. Cardiac CT is also much quicker than a stress test and can save people from getting an invasive cardiac catheterization," said Dr. Takakuwa. "Our goal is to be able to perform cardiac CT using tube current modulation 24/7 and as a means to be able to admit or discharge patients more rapidly," he said. Source: This study appears in the April issue of the American Journal of Roentgenology. For more information: www.ajronline.org

Related Content

Researchers Awarded 2018 Canon Medical Systems USA/RSNA Research Grants
News | Radiology Imaging | November 13, 2018
The Radiological Society of North America (RSNA) Research & Education (R&E) Foundation recently announced the...
The Fujifilm FCT Embrace CT System displayed for the first time at ASTRO 2018.
360 Photos | 360 View Photos | November 07, 2018
Fujifilm's first FDA-cleared compu...
MaxQ AI Receives FDA Clearance for Accipio Ix Intracranial Hemorrhage Platform
Technology | Artificial Intelligence | November 07, 2018
MaxQ AI announced that its Accipio Ix intracranial hemorrhage (ICH) detection software has received 510(k) clearance...
GE Healthcare Discovery RF Gen 2 system displayed at ASTRO 2018. It is a dedicated computed tomography (CT) scanner for radiation oncology
360 Photos | 360 View Photos | November 07, 2018
This is the GE Healthcare Discovery RF Gen 2 system displayed at the ...
Results of the vertebrae-based analysis (383 vertebrae in 34 patients) for detection of BME.

Results of the vertebrae-based analysis (383 vertebrae in 34 patients) for detection of BME.

Sponsored Content | Case Study | Computed Tomography (CT) | November 06, 2018
The following is a summary of a study published in the
The NeuViz 16 Essence from Neusoft Medical Systems.

The NeuViz 16 Essence from Neusoft Medical Systems.

Feature | Computed Tomography (CT) | November 05, 2018 | By Melinda Taschetta-Millane
According to an industry mark...
Carestream Spotlights Healthcare IT and Imaging Systems at RSNA 2018
News | Information Technology | October 31, 2018
Carestream announced it will be displaying several imaging and healthcare information technology (IT) offerings at the...
IMRIS, Siemens Strengthen Collaboration in Hybrid OR Neurosurgical Market
News | Hybrid OR | October 24, 2018
IMRIS, Deerfield Imaging, in partnership with Siemens Healthineers, announced a strengthened collaboration to advance...
Fujifilm Unveils FCT Embrace CT System for Oncology
Technology | Computed Tomography (CT) | October 23, 2018
Fujifilm Medical Systems U.S.A. Inc. recently introduced the FCT Embrace computed tomography (CT) system. Powered by...
The Aquilion Precision CT system from Canon offers very high resolution imaging, which may aid in cancer detection and improved treatment planning in radiation oncology. #ASTRO2018 #ASTRO #ASTRO18

The Aquilion Precision CT system from Canon offers very high resolution imaging, which may aid in cancer detection and improved treatment planning in radiation oncology. 

News | Computed Tomography (CT) | October 19, 2018
October 19, 2018 – At the 2018 American Society of...