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Lower dosage CT-guided lung biopsy protocol maintains quality, minimizes exposure
Date:3/25/2012

nite radiation exposure," said Collins. "Although the jury is still out to some degree, there is general consensus in the community that the radiation dose risk is both linear and additive. Any place where we can reduce the incremental dose for each imaging study is very important because the overall exposure over time can be substantial," he noted.

For this study, researchers implemented the new CT imaging protocol for lung-nodule biopsy and then reviewed data from 100 people, half of whom underwent CT-guided biopsies prior to the new protocol and half after the protocol went into effect.

The low dose protocol led to a dramatic 66 percent drop in radiation dose, and image quality was maintained for all of the CT-guided biopsies.

"We found that simple modifications to the CT technique used for guidance to perform lung biopsies resulted in a significant dose reduction to individuals treated," noted Collins. "This was possible while maintaining appropriate image quality for interventional radiologists performing biopsy, and fortunately the modification to the scanner technique is simple and can be applied to any existing CT scanner system," he added.

"The new protocol can be adopted immediately to reduce exposure, but interventional radiologists will still need to evaluate each person on a case-by-case basis, especially smaller people or those who have anatomy that is more difficult to image. The dose can be reduced even further for children, but more studies need to be done to tailor the protocol," says Collins.


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Contact: Ellen Acconcia
eacconcia@sirweb.org
703-460-5582
Society of Interventional Radiology
Source:Eurekalert

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