The board of North American Scientific Inc. named John Rush to take over company founder L. Michael Cutrer's position as chief executive officer and president of the Chatsworth-based cancer treatment products company.


Rush, 48, has been chief executive of Pleasanton-based medical device maker Sanarus Medical since 2002. Before that, he held the same title at Micro Therapeutics Inc., which is now owned by ev3 Inc.


Rush, whose previous company made devices to treat breast diseases, will oversea North American's launch of its new brachytherapy radiation breast cancer treatment, the company said. Financial details of Rush's hiring were not disclosed. He will start in mid-April and is expected to eventually join the board.


Cutrer, 51, will become North American's executive vice president and chief technology officer, and will remain on the board.


North American shares fell 5 cents, or 5.2 percent, to close at 89 cents on the Nasdaq Stock Market. Shares gained 1 cent in after-hours trading.

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