Joyce Keyak, UCI associate professor in residence of radiological sciences, recently participated in NASA’s first Bone Summit to develop therapeutic guidelines addressing the risk of early-onset, age-related osteoporosis in astronauts who serve on long-duration space missions. Keyak gave a lecture on the assessment of hip bone strength, and at the summit’s close, the group recommended using a Keyak-created computer program gauging hip bone fracture risk to monitor astronauts’ bone health. The June 7-8 summit was held at the Johnson Space Center in Houston. In a 2009 study of 13 astronauts who spent four to six months on the International Space Station, Keyak and colleagues found that, on average, astronauts’ hip bone strength decreased 14 percent.