The Maui News - The Pacific Cancer Institute of Maui is undertaking a nearly $7 million expansion and renovation project, primarily to accommodate a new, $3 million machine for radiation surgery and therapy. The institute is expecting to get a building permit from Maui County this week for its 2,500-square-foot expansion into the driveway area at Maui Memorial Medical Center, said Dr. Bobby Baker, a radiation oncologist and founder of the institute. Plans also call for increasing the number of patient examination rooms from three to five and doctors' offices from two to four. The new machine, a TrueBeam STx system, requires construction of a concrete vault measuring 42-by-42 feet in length and width and nearly 18 feet high, Baker said. It will need some 8-foot-thick walls to protect those outside from radiation.