NASI North American Scientific (MM)

North American Scientific, Inc. (Nasdaq:NASI) announced today that it has been invited to present at the Sixth Annual Needham & Company, LLC Biotechnology and Medical Technology Conference, which will take place at the New York Palace Hotel. The Company is scheduled to discuss its business strategies and market opportunities on Wednesday, June 13, 2007 at 1:30 p.m. Eastern Time. Attendance at the conference is by invitation only. North American Scientific will offer a live audio webcast of its presentation, which may be accessed through the Company�s website at www.nasmedical.com. An archived replay of the presentation will also be available approximately three hours following the live presentation. A link to the webcast replay will be available at the North American Scientific website. About North American Scientific North American Scientific is a leader in radiation therapy products and services in the fight against cancer. Its innovative products provide physicians with tools for the treatment of various types of cancers. They include Prospera� brachytherapy seeds and SurTRAK� needles and strands used primarily in the treatment of prostate cancer. In addition the Company plans to commercialize its ClearPath� multi-channel catheter breast brachytherapy devices in 2007, which are the only devices approved for both high dose and continuous release, or low dose, radiation treatments. The devices are designed to provide flexible, precise dose conformance and an innovative delivery system that is intended to offer the more advanced form of brachytherapy for the treatment of breast cancer. North American Scientific�s NOMOS� Radiation Oncology Division provides external beam radiation therapy products for Serial Tomotherapy Intensity Modulated Radiation Therapy (IMRT) and Image-Guided Radiation Therapy (IGRT). Serial tomotherapy IMRT allows an escalated radiation dose to be delivered to a tumor while limiting exposure and damage to nearby healthy tissue. These products are marketed under the trade names nomosSTAT�and CORVUS� (our proprietary treatment planning software). The Company's IGRT products, BAT�, BATCAM� and nTRAK�, provide fast and accurate targeting and localization of a treatment volume on a daily basis. More than 500 hospitals and research sites worldwide are equipped with the Company's clinically proven serial tomotherapy, inverse treatment planning, image-guidance and ancillary treatment solutions. Please visit www.nasmedical.com for more information.