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Edition: U.S. Article Comments (2) Save Email Print Reprints Most Popular Most Shared Music business badly needs Eminem's "Recovery" 21 Jun 2010 Times Square bomb suspect indicted in New York | Video 18 Jun 2010 Miley Cyrus "no underwear" photo is fake, blogger says 15 Jun 2010 BP: 23,290 barrels of leaking oil captured Sunday 21 Jun 2010 China says "concerned" about South Korea-U.S. drill 7:53am EDT White House summons McChrystal 10:41am EDT Obama to warn health insurers against rate jumps 9:57am EDT China state-owned banks buying dollars heavily: traders 21 Jun 2010 Nebraska town latest to fight illegal immigrants 1:07am EDT Weak home data slices into shares, gold rises 11:36am EDT Japanese couples say "I do" -- in divorce ceremonies 21 Jun 2010 Music business badly needs Eminem's "Recovery" 21 Jun 2010 White House summons McChrystal 10:20am EDT Nebraska town latest to fight illegal immigrants 1:07am EDT U.S. indirectly funding Afghan warlords: House report 8:01am EDT B vitamins linked to depression risk in older adults 18 Jun 2010 Researchers see chimps waging "war" 21 Jun 2010 Obama to warn health insurers against rate jumps 9:57am EDT EU sees solar power imported from Sahara in 5 years 20 Jun 2010 China says "concerned" about South Korea-U.S. drill 7:53am EDT Software cuts CT radiation dose in half : U.S. study Julie Steenhuysen CHICAGO Mon Jun 21, 2010 4:40pm EDT CHICAGO (Reuters) - A new software program that enhances the quality of CT images allowed doctors to cut in half the radiation dose needed for a colon scan and still produce clear images, U.S. researchers said on Monday. Health | Technology A series of recent studies has suggested that computed tomography or CT scans can increase a person's lifetime risk of cancer, especially younger people who have multiple scans. "This new technique allows us to use far less radiation than even a typical abdominal CT scan without compromising image quality," said Dr. Daniel Johnson of the Mayo Clinic in Scottsdale, Arizona, whose study appears in the American Journal of Roentgenology. CT scans of the colon, sometimes called a virtual colonoscopy, are meant to replace the more invasive test in which a camera is inserted into the rectum and threaded through the colon to look for signs of cancer. The scans have been shown to be effective, but concerns about radiation exposure have scared many doctors off. "One of the reasons people say not to get a virtual colonoscopy is because of radiation dose. This is a method you could use to minimize that concern," Dr. Amy Hara of Mayo, who worked on the study, said in a telephone interview. "The fact that we can now screen patients with an increasingly lower dose can allay concerns, attract more patients to be screened and ultimately save tens of thousands of lives each year," Johnson said in a statement. Medical equipment makers General Electric, Siemens AG and Philips have been working on ways to reduce the amount of radiation required to produce an image. Johnson studied a technique launched by GE in 2008 called Adaptive Statistical Iterative Reconstruction or ASIR. The software allows radiologists to reduce the noise or "fuzz" in an image, making for a clearer picture with less radiation. The team studied image quality using both standard and reduced radiation doses in a "phantom" or dummy colon and in 18 patients. They saw no significant difference in image quality between the patients who got the test with the standard dose, and those who got less radiation with the ASIR technique. And the phantom study showed much less fuzz when images were made with ASIR. GE provided the software for the study. Hara said other equipment makers are testing similar products, but so far, GE appears to be in the lead with the technology. In May, researchers at the International Society for Computed Tomography conference in San Francisco presented the first results of studies using GE's next-generation version of ASIR, which may allow doctors to cut the radiation dose by 80 percent, the company said last month. (Editing by Maggie Fox and Todd Eastham) Health Technology Comments See All Comments (2) | Post Comment Jun 22, 2010 7:11am EDT www.xrayrisk.com has more info on radiation and cancer risk including an online calculator that lets you calculate radiation dose and estimate cancer risk from CT scans, x-rays and procedures. hanleym Report As Abusive Jun 22, 2010 11:37am EDT Anyone know when this technology is likely to be out on the market? jramos Report As Abusive See All Comments (2) Add a Comment *We welcome comments that advance the story directly or with relevant tangential information. We try to block comments that use offensive language or appear to be spam and review comments frequently to ensure they meet our standards. If you see a comment that you believe is irrelevant or inappropriate, you can flag it to our editors by using the report abuse links. Views expressed in the comments do not represent those of Reuters. © Copyright 2010 Thomson Reuters Editorial Editions: Africa Arabic Argentina Brazil Canada China France Germany India Italy Japan Latin America Mexico Russia Spain United Kingdom United States Reuters Contact Us Advertise With Us Help Journalism Handbook Archive Site Index Video Index Reader Feedback Analyst Research Mobile Newsletters RSS Podcasts Widgets Your View Labs Thomson Reuters Copyright Disclaimer Privacy Professional Products Professional Products Support Financial Products About Thomson Reuters Careers Online Products Acquisitions Monthly Buyouts Venture Capital Journal International Financing Review Project Finance International PEhub.com PE Week FindLaw Thomson Reuters is the world's largest international multimedia news agency, providing investing news, world news, business news, technology news, headline news, small business news, news alerts, personal finance, stock market, and mutual funds information available on Reuters.com, video, mobile, and interactive television platforms. 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