Tim Ravenscroft has been named president of Bristol-Myers Squibb Medical Imaging (North Billerica, Massachusetts). Ravenscroft most recently served as vice president of Bristol-Myers Squibb's global virology franchise. Bristol-Myers Squibb Medical Imaging, focused on cardiovascular imaging, is a subsidiary of Bristol-Myers Squibb, a global pharmaceutical and related healthcare products company.

• Luminex (Austin, Texas), a manufacturer of biological testing technologies, reported management changes. Dr. James Jacobson has been named to the new position of vice president and chief scientific officer. Jacobson will continue in his role as chairman of the Luminex scientific advisory board. Dr. John Carrano has been named vice president, research and development. In his new capacity, Carrano will join the Luminex scientific advisory board. Oliver Meek has been named to the new position of vice president, quality assurance and regulatory affairs.

Lidia Fonseca has been promoted to executive vice president, global operations and technology, at Synarc (San Francisco). Since joining the company in 2005, Fonseca has been primarily responsible for systems and technology functions at Synarc involving IT, engineering and clinical data management functions. Synarc provides centralized imaging and molecular marker services for clinical trials.

Dr. Sharon Grehan has been appointed to the position of managing consultant, consulting services for WWMR (San Mateo, California). Grehan has been with WWMR for three years, providing a scientific background to market research and strategic consulting projects. WWMR is an independent marketing research and strategic consulting firm serving the pharmaceutical, biotech, medical device and diagnostics industries.