Toshiba America Medical Systems Inc. said Monday it tapped 15-year industry veteran Joseph Cooper to take the reins of its CT business unit.

The Tustin, Calif.-based medical imaging technology giant said Cooper was being promoted from senior manger of the CT business unit in charge of strategic development to director of the unit.

Cooper, who spent 10 years growing the CT market for Siemens in Southern California, has been with Toshiba for five years, the company said.

"His leadership in strategic development at Toshiba has resulted in the development of advanced technical and clinical features for our CT systems," Toshiba's VP of marketing and strategic development Doug Ryan said in prepared remarks.

Cooper's appointment is the second major modality shuffle in as many months. In August, Toshiba picked ex-GE Healthcare executive Stuart Clarkson to direct the MR business unit.

Along with Siemens, GE and Philips, Toshiba is one of the dominant players in the estimated $3.6 billion U.S. CT market, according to a recent Marketstrat report.