CHATSWORTH, Calif.--(BUSINESS WIRE)--June 7, 2006--North American Scientific, Inc. (Nasdaq:NASI - News) today announced financial results for its second fiscal quarter of 2006 ended April 30, 2006. “For the second consecutive quarter, we achieved sequential growth in our revenues, which was driven primarily by increased Radiation Sources revenues,” said L. Michael Cutrer, President and CEO. “In addition, we continued to reduce our operating expenses, which decreased $1.2 million, or 15%, compared with the second quarter of 2005 and are down $2.3 million, or 16%, during the first six months of fiscal 2006.