Angling of Beam During Coronary CT Halves Radiation Dose to Breast
http://www.medscape.com/viewarticle/584874
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Angling of Beam During Coronary CT Halves Radiation Dose to Breast
Reuters Health Information 2008. © 2008 Reuters Ltd.
Republication or redistribution of Reuters content, including by framing or similar means, is expressly prohibited without the prior written consent of Reuters. Reuters shall not be liable for any errors or delays in the content, or for any actions taken in reliance thereon. Reuters and the Reuters sphere logo are registered trademarks and trademarks of the Reuters group of companies around the world.
By Martha Kerr
CHICAGO (Reuters Health) Dec 05 - Use of "an angled gantry approach," or "angled axial image acquisition" during coronary computed tomography (CT) angiography significantly reduces the amount of radiation delivered to breast tissue, radiologists from Thomas Jefferson University in Philadelphia reported Thursday at the 94th Scientific Assembly and Annual Meeting of the Radiological Society of North America (RSNA 2008).
Dr. Ethan Halpern and colleagues reviewed images obtained with a 64-slice helical scanner during 100 consecutive coronary CT angiography examinations.
The investigators evaluated sagittal images to define the position of the breasts and determine the gantry angulation that would be necessary in order to perform a CT examination in a view parallel to the long axis of the heart.
A standard axial image required a 6.5 cm overlap with the lower breast for coronary CT angiography. The angled scan required only a 3.2 cm overlap, meaning the dose of radiation delivered to breast tissue was cut in half, Dr. Halpern told meeting attendees.
"Angled gantry is a feasible technique for coronary angiography," he said. "These results warrant the development of machines that can perform this technique."
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Angling of Beam During Coronary CT Halves Radiation Dose to Breast
Reuters Health Information 2008. © 2008 Reuters Ltd.
Republication or redistribution of Reuters content, including by framing or similar means, is expressly prohibited without the prior written consent of Reuters. Reuters shall not be liable for any errors or delays in the content, or for any actions taken in reliance thereon. Reuters and the Reuters sphere logo are registered trademarks and trademarks of the Reuters group of companies around the world.
By Martha Kerr
CHICAGO (Reuters Health) Dec 05 - Use of "an angled gantry approach," or "angled axial image acquisition" during coronary computed tomography (CT) angiography significantly reduces the amount of radiation delivered to breast tissue, radiologists from Thomas Jefferson University in Philadelphia reported Thursday at the 94th Scientific Assembly and Annual Meeting of the Radiological Society of North America (RSNA 2008).
Dr. Ethan Halpern and colleagues reviewed images obtained with a 64-slice helical scanner during 100 consecutive coronary CT angiography examinations.
The investigators evaluated sagittal images to define the position of the breasts and determine the gantry angulation that would be necessary in order to perform a CT examination in a view parallel to the long axis of the heart.
A standard axial image required a 6.5 cm overlap with the lower breast for coronary CT angiography. The angled scan required only a 3.2 cm overlap, meaning the dose of radiation delivered to breast tissue was cut in half, Dr. Halpern told meeting attendees.
"Angled gantry is a feasible technique for coronary angiography," he said. "These results warrant the development of machines that can perform this technique."
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