Duncan Ross has joined AtCor Medical Holdings (West Ryde, Australia) as president and CEO of its North American business, AtCor Medical (Lisle, Illinois). Ross brings to AtCor more than 23 years of experience, including four years as president of Apogent Technologies and Fisher Scientific Products Laboratory Equipment Group, and president of Apogent's Barnstead International unit. AtCor is developing cardiovascular technologies for risk assessment and patient management, including the SphygmoCor family of products. The SphygmoCor Px system non-invasively provides the calibrated blood pressure waveform in the ascending aorta.

• Partners Imaging (Dallas) is expanding its national sales effort to include the addition of three regional sales directors to develop computed tomography partnerships with cardiologists throughout the U.S. The Southeast region will be managed by David Hoglund, former district manager for cardiac services, Burdick. The Northeast region will be managed by Scott Cummings, formerly of Quinton/Spacelabs/Burdick. The Western region will be managed by Peter Rodrigues, formerly with Digirad.