A system for protecting a sector of tissue from exposure to surgically directed radiation includes a processor and an input device, a camera, and an output screen in electronic communication with the processor. A software resident on the processor receives camera data containing an image of a region...http://www.google.com.tw/patents/US6599286?utm_source=gb-gplus-share專利 US6599286 - Laser ablation zone restriction system and method
