A private equity firm has completed its $68.3 million purchase of Theragenics, a struggling Georgia maker of surgical tools and prostate cancer treatments. Juniper's acquisition of the company follows approval of the deal by Theragenics shareholders at an Oct. 17, 2013, special meeting. The sale price: about $2.20 per share in cash. Theragenics CEO M. Christine Jacobs is slated to retire, and current CFO Frank Tarallo will step in and replace her. Theragenics has faced sales declines in its surgical products and brachytherapy seeds businesses, and the company is shifting some manufacturing to Latin America. Item