LAKE FOREST, Calif.--(BUSINESS WIRE)--InSight Health Services Holdings Corp. (“Insight Imaging”) (OTCBB: ISGT) announced today the appointment of Clark Nielsen as senior vice president – sales. Nielsen, who has extensive healthcare sales experience with Philips Healthcare, will have responsibility for sales of Insight Imaging’s wholesale segment and will report directly to Kip Hallman, Insight Imaging’s president and CEO.