Torrance, Calif., LED manufacturer LEDtronics Inc. has named Kurt Weegmann as its new sales representative for Minnesota. Weegmann has 20 years of experience in electronics and in solid-state lighting sales; he can be contacted at Applied Technologies Inc., 2585 Christian Parkway, Chaska, MN, 55318; phone: 952-361-6542; e-mail: [email protected].    . . .    Imaging Diagnostic Systems Inc., a Plantation, Fla., medical technology company, announced that pharmaceutical company Schering AG, of Germany, has installed its computed tomography laser mammography (CTLM) system at the Charite Hospital in Berlin for use in optical mammography clinical trials to study the fluorescent imaging compound SF64. The companies have already installed systems and begun trials at the Robert Rossle Clinic at the University of Berlin and at the University of Muenster. The studies will help determine the benefits of using both absorption and fluorescent techniques to enhance the system's ability to detect breast cancer.