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Device zeroes in on small breast tumors
Date:1/28/2008

A new medical imager for detecting and guiding the biopsy of suspicious breast cancer lesions is capable of spotting tumors that are half the size of the smallest ones detected by standard imaging systems, according to a new study.

The results of initial testing of the PEM/PET system, designed and constructed by scientists at the Department of Energys Thomas Jefferson National Accelerator Facility, West Virginia University School of Medicine and the University of Maryland School of Medicine will be published in the journal Physics in Medicine and Biology on Feb. 7.

This is the most-important and most-difficult imager weve developed so far, Stan Majewski, Jefferson Lab Radiation Detector and Medical Imaging Group leader said. It is another example of nuclear physics detector technology that we have put a lot of time and effort into adapting for the common good.

Testing of the new imager was led by Ray Raylman, a professor of radiology and vice chair of Radiology Research at WVU and lead author on the study. Raylmans team imaged various radioactive sources to test the resolution of the system.

We had good performance characteristics, with image resolution below two millimeters. In regular PET, the image resolution is over five millimeters, so we're quite a bit better than that, Raylman said. In addition, the initial tests revealed that the PEM/PET system can complete an image and biopsy in about the same amount of time as a traditional biopsy.

The ability of the device to do biopsy is probably one of its most unique characteristics. There are other breast imagers, but none that are built specifically to do biopsy as well as imaging, Raylman said.

The system features components designed for imaging the unique contours of the breast. Known as positron emission mammography (PEM), this imaging capability enables users to attain high-resolution, thr
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Contact: Kandice Carter
kcarter@jlab.org
757-269-7263
DOE/Thomas Jefferson National Accelerator Facility
Source:Eurekalert

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