Canon USA Inc. of Lake Success, N.Y., has announced the appointment of Chris Duca as president of its Deerfield, Fla.-based wholly owned subsidiary, Virtual Imaging Inc., a maker of diagnostic imaging products. Canon acquired the business in April 2009 (See Canon Buys Virtual Imaging). Duca succeeds Virtual Imaging founder Tim Martinson, who is retiring. Duca began his career in the medical imaging field in 1984 and has focused on CT and MRI development. He established Integrated Technologies in 1993 and was appointed vice president and chief operating officer of Virtual Imaging when the two companies merged in 2005.