A Gwinnett County company that makes treatment devices for prostate cancer this month nailed down an acquisition agreement. If it closes, it will be Theragenics Corp.’s third acquisition in four years. Powell Goldstein partner Rick Miller has been there for all of the deals.

Miller was lead corporate counsel to Theragenics, of Buford, on its agreement to purchase NeedleTech Products Inc. of Attleboro, Mass. for $47.8 million in cash. NeedleTech makes specialty needles used in cardiology, orthopedic, endoscopy, urology and other medical markets.

Miller’s team included Powell Goldstein partners Robert Lewinson and Paul Concannon and associates Amanda Norcross and Toby Butler.