Phillip Vorwald has been named vice president, worldwide sales at Guava Technologies (Hayward, Cal-ifornia). Vorwald joins Guava from Delphi Medical Systems, where he served as managing director. Guava's product offerings combine rugged and reliable instrument platforms with a variety of assays and software modules to provide complete solutions for on-demand cellular analysis.

Michael Murdock has been appointed senior vice president and CFO of Radiologix (Dallas). He will join the company on Feb. 1, replacing Richard Sabolik. For the past five years, Murdock has served as CFO of Dental One. President and CEO Sami Abbasi, the company's former CFO, will act as interim CFO until Jan. 31. Radiologix is a national provider of diagnostic imaging services, owning and operating multi-modality diagnostic imaging centers.

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, effective Jan. 10. Timothy Guertin, executive vice president, has been named chief operating officer. Guertin joined the company 29 years ago and has been serving as president of Oncology Systems, Varian's largest business segment, since 1999. Dow Wilson has been appointed corporate vice president and president, Oncology Systems. Wilson comes to Varian from GE, where he has been serving as CEO of the GE Healthcare-Information Technologies business. Elisha Finney, corporate vice president and CFO, has been promoted to senior vice president. Finney, who joined Varian 16 years ago, is now responsible for all finance, investor relations, information systems and regulatory affairs for Varian Medical.

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