Robert Gontarek was named COO of Diagnostic Health (DHC; Birmingham, Alabama), effective May 19. Gontarek most recently was executive VP of operations for CBIZ Medical Management Professionals. DHC is an independent provider of diagnostic imaging services.

Bernie O'Rourke was named executive VP/COO of InSight Health Services Holdings Corp. (Lake Forest, California). O'Rourke has been senior VP/GM, Eastern Division of InSight since March 2006. InSight is a provider of diagnostic imaging services.

Jay Moyes was named CFO of XDx (Brisbane, California). He previously was VP of finance/CFO at Myriad Genetics. XDx is a molecular diagnostics company focused on noninvasive gene expression tests for the monitoring of immune-mediated conditions.

• StatSure Diagnostic Systems (New York) said that effective July 1, Steve Peltzman, CEO/chairman, and D. Bruce Pattison, president/COO and director, have resigned. Peltzman and Pattison have indicated that they will enter into consulting agreements with StatSure. In addition, Richard Woodrich has resigned as a director. The board elected Moishe Bodner, currently VP of the company, as CEO/director, and Leo Ehrlich, current CFO and director, was elected president/COO, effective July 1. StatSure makes immunoassay tests for the detection of sexually transmitted and other infectious diseases.