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Tumors 'light up' with new, unique imaging system using scorpion venom protein and a laser
Date:2/25/2014

e MBBS is India's equivalent of an MD. The camera device, designed in Butte's lab, solves this problem by capturing two images and combining them on a high-definition monitor.

"Other experimental systems we have seen which use different tumor-targeting methods are larger and bulkier because they consist of two cameras," Butte said. "Our single-camera device takes both near-infrared and white light images simultaneously. This is achieved by alternately strobing the laser and normal white lights at very high speeds. The eye just sees normal light, but the camera is capturing white light once, near-infrared light next, over and over. We then superimpose the two HD images. The image from the laser shows the tumor, and the image produced from white light shows the visible 'landscape' so we can see where the tumor is in context to what we actually can see."

The prototype is compact, but the authors said they are working to make the next generations even smaller, lighter and portable so the device will require very little space in operating room, allowing the neurosurgeon to focus on the operating microscope and give little attention on the imaging system. "We hope that eventually the camera can be transported in a small bag, but we are not sacrificing image quality for portability," Butte said. "In fact, most systems that use two cameras lose a lot of light. But because of the special filters we use and the way we arrange them, we lose very little light. And from what we have seen and tested, our device provides about 10 times greater sensitivity and contrast than others."

In an editorial accompanying the journal article, David W. Roberts, MD, from the Section of Neurosurgery at the Geisel School of Medicine at Dartmouth College, said the Cedars-Sinai "paper presents a newer direction in which fluorescence-guided surgery may well be headed." He noted that the researchers overcame one of the limitations of near-infrared technology that it is o
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Contact: Sandy Van
sandy@prpacific.com
808-526-1708
Cedars-Sinai Medical Center
Source:Eurekalert

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