Michael Green was promoted to COO of Artes Medical (San Diego). Green will continue to hold the position of CFO and retain his responsibility for all financial, accounting and investor relations activities. Artes Medical is a medical aesthetics company focused on the dermatology and plastic surgery markets.

The American Society for Therapeutic Radiology and Oncology (ASTRO; Fairfax, Virginia) reported that Barbara Muth is its new director of research and Jennifer Frazier has been named a health policy analyst. Previously, Muth was with the American Red Cross as a research manager. Frazier previously completed a fellowship at the National Cancer Institute in health communications. ASTRO is the largest radiation oncology society in the world, with more than 9,000 members who specialize in treating patients with radiation therapies.

Guillermo Moreno has been named VP of sales and marketing at Aurillion (Toronto). Moreno was with Cerner for 10 years as VP/GM of the Latin America and Caribbean markets. Aurillion makes healthcare workflow management tools.

• Coapt Systems (Palo Alto, California) reported the appointments of David Barella as senior VP, global marketing and sales, and Bader Bellahsene, PhD, as VP, research, development and manufacturing. Barella previously was EVP, international sales and marketing for MediCor, while Bellahsene was VP of research and development at Thermage. Coapt Systems makes bioabsorbable products for facial rejuvenation procedures in aesthetic and reconstructive markets.

• EnteroMedics (St. Paul, Minnesota) said that Dennis Kim, MD, VP of medical affairs and chief medical officer, has resigned. Katherine Tweden, PhD, VP of research, will also assume the role of interim VP of medical affairs, overseeing daily operations of the company's clinical department. Tweden is a co-founder of the company and has been head of its research department since January 2003. EnteroMedics makes devices using neuroblocking technology to treat obesity and other gastrointestinal disorders.