Robert Saltmarsh has been appointed CFO of Nanogen (San Diego). Saltmarsh joined Nanogen as vice president of corporate development last September. In addition to participating in business development initiatives, he assumed oversight of all financial operations and investor relations for the company. Nanogen makes the NanoChip Molecular Biology Workstation, NanoChip Electronic Microarray and a suite of analyte specific reagents to develop tests to detect infectious diseases, drug toxicity and mutations associated with cancer, cardiovascular and genetic diseases.

Frederick Robertson, MD, has joined TomoTherapy (Madison, Wisconsin) as CEO. Robertson spent almost nine years with Marquette Medical Systems, most recently as CEO and president, prior to its acquisition by GE Medical. Prior to joining the company, Robertson was with the Medical College of Wisconsin both as a pediatric anesthesiologist and assistant professor of anesthesiology. TomoTherapy has developed a medical system that combines on-board computed tomography imaging with conformal radiation therapy for cancer patients.

Varian Medical Systems (Palo Alto, California), a manufacturer of integrated cancer therapy systems, X-ray tubes and flat-panel digital subsystems for imaging, reported three new management appointments. Timothy Guertin, executive vice president, has been named chief operating officer. Guertin joined the company 29 years ago and has been serving since 1999 as president of Oncology Systems, Varian's largest business segment. Dow Wilson has been appointed corporate vice president and president, Oncology Systems. Wilson previously was CEO of GE Healthcare-Information Technologies. Elisha Finney, corporate vice president and CFO, has been promoted to senior vice president.

David Harkham will resign as CEO of Vencor International (Beverly Hills, California), effective Feb. 1. Harkham is resigning to take care of family and personal matters. Todd Davis has been named Vencor's new president and CEO. Davis has 15 years of experience in the investment banking industry and working with companies in the fields of biotechnology, advanced medical technology and solution applications and medical product distribution. Vencor markets at-home diagnostic products to consumers in the U.S. via the Internet and infectious disease rapid tests to healthcare professionals in emerging healthcare markets.

Gregory Furness has resigned as CFO of Vital Images (Minneapolis), effective Feb. 8. Vital Images has engaged Michael Carrel of Technology Solutions Co. (Chicago) as interim CFO. Carrel is a senior vice president with the IT consulting firm. Most recently, Carrel served as president, CEO and CFO of Zamba. Vital Images provided visualization software for use in disease screening applications, clinical diagnosis and therapy planning.