Implant Sciences Receives $3.6 Million U.S. Army Contract for Explosives Detection Systems; Implant Sciences to Provide Systems Capable of Remotely Detecting Explosives in Vehicles.

WAKEFIELD, Mass. -- Implant Sciences Corporation (AMEX: IMX) a developer and manufacturer of products for national security, medicine and industry, announced it has been awarded a $3.6 million contract from the U.S. Army RDECOM CERDEC Night Vision and Electronic Sensors Directorate to fabricate and deliver three (3) systems for detecting explosives in vehicles and other fixed locations. It is anticipated that these systems will have the ability to be used either in a fixed location, such as a security check point, or to be deployed in tandem with a mobile robot mounted system that can be used to detect explosives in remote areas.

The systems, which will utilize the Company's proprietary, non-contact technology, will have the capability to detect trace amounts of explosives from a short-range standoff distance. By using a sensor unit similar to the one in the Company's passenger portal prototype, currently under construction, the Company will be able to leverage its prior development work to expedite the delivery of these systems to the Army.

Dr. Anthony J. Armini, PhD., CEO of Implant Sciences, commented, "We are gratified at being selected by the Army to provide these systems using the Company's patented, non-contact explosives detection technology. We believe our proprietary vortex collection and sampling system is a key differentiator between our trace explosives detection systems and those of the competition. Our technology enables our systems to be easily adapted to a variety of explosives detection applications. The Company's handheld explosives detector has been commercially deployed throughout the world over the past year. Combined with our commercially available desktop detector, the passenger portal currently under construction and this vehicle scanner, we believe we are establishing a broad suite of products to address security applications throughout the world and across government and private sectors. Following the vehicle detection systems' delivery and field testing by the U.S. Army, we believe additional applications for checking vehicles at U.S. border crossings, military check points, government installations, and critical public infrastructures, such as nuclear plants, will also be available. We also believe this proposed mobile solution to explosives detection, which combines our standoff detection technology with robotics, could provide an important solution to the detection of explosives in remote military areas, thus reducing the danger to personnel."

About Implant Sciences

Implant Sciences, incorporated in 1984, is using its core ion technology to develop, manufacture and market products for the homeland security, semiconductor and medical device industries. The Company has developed and commercialized portable and bench-top detection devices to identify explosives which are distributed under the Quantum Sniffer(TM) brand name. The Company also provides state of the art ion implantation and wafer analytical services for the semiconductor industry. The Company also develops, manufactures and sells radioactive products for the treatment of cancer, including sales of radioactive seeds for the treatment of prostate cancer and development of a new, FDA approved radioactive source for use in the treatment of breast cancer. For further details on the Company and its products please visit the Company's website at www.implantsciences.com.

Implant Sciences believes that this press release contains forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. Such forward-looking statements are subject to risks and uncertainties. Such statements are based on management's current expectations and are subject to facts that could cause results to differ materially from the forward-looking statements. For further information you are encouraged to review Implant Sciences' filings with the Securities and Exchange Commission, including its Annual Report on Form 10-KSB for the period ended June 30, 2005, and Quarterly Report on Form 10-Q/A for the period ended September 30, 2005, and on Form 10-Q for the periods ended December 31, 2005 and March 31, 2006. The Company assumes no obligation to update the information contained in this press release.