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Mayo Clinic researchers share latest findings in CT radiation dose reduction efforts
Date:8/3/2010

hen we use very low doses of radiation to acquire a CT, image graininess can significantly decrease the value of the exam," says the study's first author, Juan Carlos Ramirez Giraldo, Mayo Clinic. "With this new algorithm, we are able to maintain the image quality by cross-referencing it with other images collected during the exam."

In related efforts, using one of the latest CT scanners on the market, Mayo Clinic already has other advanced algorithms as part of its clinical practice. A team of radiologists and physicists have recently implemented a new routine head CT protocol that cuts radiation dose by nearly 50 percent. While the American College of Radiology allows its accredited facilities to use head CT doses up to approximately 75 mGy, Mayo Clinic's newly introduced patient protocol uses a dose of only 38 mGy. This dose reduction is particularly significant as head CT exams are one of the most commonly performed CT procedures.

When asked how the new head CT protocol is changing clinical practice, neuroradiologist David DeLone, M.D., Mayo Clinic, says, "patients aren't aware that anything has changed, and as radiologists looking at a study, we don't know anything has changed. Yet, we are obtaining high-quality images, more consistently and in shorter times, while exposing patients to about half of the radiation dose. It's a win-win for everyone."


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Contact: Rebecca Finseth
newsbureau@mayo.edu
507-284-5005
Mayo Clinic
Source:Eurekalert

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