A method of controlling a medical device is provided. The method includes generating a beam of radiation using a radiation source assembly. The beam of radiation is directed toward a distal end of the medical device using an optical fiber. The beam of radiation is directed onto an area of interest by...http://www.google.com.tw/patents/US7925333?utm_source=gb-gplus-share專利 US7925333 - Medical device including scanned beam unit with operational control features