ရင္သား ကင္ဆာကိုကြန္ပ်ဴတာ အသံုးျပဳ၍ရွာျခင္းထက္ လူသားကပိုမိုထိေရာက္။
Computer-aided mammography finds breast cancers no better than the human-read kind, and it prompts more unnecessary biopsies, said a study out Thursday.
"The use of computer-aided detection is associated with reduced accuracy of interpretation of screening mammograms," said the study published in the the New England Journal of Medicine.
"The increased rate of biopsy with the use of computer-aided detection is not clearly associated with improved detection on invasive breast cancer," said the study of 429,345 mammographies in 43 US medical centers, which detected 2,351 cancers between 1998 and 2002.
The study is the largest yet to compare the two systems. The computer-assisted machines detected 4.20 cancers for every 1,000 women, while the old method found 4.15 per 1,000.
However, the computer-aided detection led to 20 percent more biopsies of suspected tissue which turned out to be negative.
On the other hand, the computer assist found less-dangerous cancers than the simple mammography, said Joshua Fenton, of the University of California at Sacramento, one of the study's authors.
"The results of this study will surprise and disappoint most mammographers," said Ferris Hall, of the Beth Israel Deaconess Medical Center.
"They constitute a substantial hit to this technology," he said.
The equipment from R2 Technology Inc., Kodak and iCAD Inc. costs some 150,000 dollars.
The US Food and Drug Association authorized the technique in 1998.
Some 24 million mammographies are performed in the United States every year. Between 15 and 30 percent of hospitals have adopted the computer assisted systems.
Medicare, the US medical system for retirees and the handicapped, pays an additional 20 dollars per mammography, when it is computer assisted.
Hall wrote that the financial incentive was approved "by a heavily lobbied Congress, despite little evidence-based data in support of its value at the time."
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