UPI July 9, 2007 GALVESTON, Texas, July 9 (UPI) -- U.S. scientists say the new laser optoacoustic imaging system, or LOIS, might soon become a mainstay medical diagnostic technology. Massoud Motamedi and colleagues at the University of Texas Medical Branch explained LOIS uses a laser beam and ultrasound to detect early-stage cancer. The system, they said, has advantages over conventional optical and ultrasound imaging methods in being able to "see" deep into the body and reveal diseased tissue.