ISORAY INC. ANNOUNCES FISCAL YEAR 2009 RESULTS.

IsoRay Inc. (AMEX:ISR), Richland, Wash., a medical isotope company focused on the treatment of lung cancer, head and neck tumors, prostate cancer and other malignant disease through use of its proprietary radioisotope technology, has announced its financial results for the quarter and year ended June 30, 2009.

Key Financial Metrics FY2009 FY2008 % Chg

Product sales 5,417,815 7,158,690 -24 %

Gross loss (353,332 ) (151,434 ) 133 %

Net loss (6,160,841 ) (8,557,507 ) -28 %

The FY2009 gross and net loss included a $425,434 impairment charge relating to a license. Excluding this one-time write off, IsoRay would have recognized a gross margin of $72,102 and a net loss of $5,735,407 in FY2009. All of the company's revenues were generated through sales of Proxcelan Cesium-131 seeds for the treatment of prostate cancer. Since the first patient implant in October 2004 over 4,000 prostate cancer patients have been treated with Proxcelan Cesium-131 Brachytherapy seeds. The company had cash and short-term investments of $4,670,564 as of June 30, 2009.

Dwight Babcock, IsoRay CEO, stated, "This past year has seen the culmination of numerous changes at IsoRay. Although it has been a challenging year for prostate brachytherapy in general, and also for IsoRay, we are very encouraged by where we stand vice."

In the first two months of the first quarter of fiscal year 2010 the company has seen dramatic improvements in the gross margin, net loss, and cash burn rate over the comparable periods of fiscal year 2009. From July 1, 2009 through August 31, 2009, based on our unreviewed preliminary internal results, gross margin is approximately 288% higher, net loss is approximately 47% lower, and cash used in operations is approximately 66% lower than the comparable two month period of fiscal year 2009. These gross margin, net loss and cash used in operations percentages do not take into account any adjustments that may be required in connection with the completion of the company's review process and should be considered preliminary until IsoRay files its Form 10-Q for the fiscal quarter ended September 30, 2009.

Major milestones achieved during the past fiscal year in the areas of restructuring, improvements and new product development that provide the company a solid platform to move forward include:

Successful impl+ementation of efficiencies in manufacturing processes, isotope forecasting, and labor requirements while providing the capacity to launch new products without significant cost increases.

Reduction in SG&A, when added to the reduced cost of manufacturing, has led to a reduced burn rate.

We continue to follow our strategy to diversify our company's core business to be less reliant on a few large centers. Many of the large centers have had their own challenges with patient volumes declining due to increased competition among centers and with companies such as UroRad. With the addition of a new vice president of sales the company is actively recruiting and seeking to establish a larger sales force in an effort to substantially improve top line growth.

Cesium-131 now has strong 3 year data on patient outcomes and the company will start releasing initial 5 year data in the spring of 2010. New product offerings and loading capabilities support expanding the company's market into lung, head and neck and other areas in this coming year which provide a much larger market opportunity than prostate alone.

The company is actively marketing the ongoing initiatives to use Cesium-131 for lung cancer at ASTRO 2009 in Chicago, IL. Many physicians who will be attending that meeting in the first week of November have already shown significant interest in using Cesium-131 for lung brachytherapy. A clinical trial will be launched in the next several months in Canada pending final approvals.

Negotiations are ongoing regarding other distribution channels both nationally and internationally.

About IsoRay

IsoRay, Inc., through its subsidiary, IsoRay Medical, Inc., is the sole producer of the Cesium-131 brachytherapy seed.

The Cesium-131 seed offers a significantly shorter radiation half-life than the two other isotopes commonly used for brachytherapy, which results in a substantially faster delivery of therapeutic radiation, a theoretically improved radiation delivery against aggressively replicating cancer(a), and the potential for a reduced longevity of common brachytherapy side effects(b). Cesium-131 is currently used in the treatment or prostate cancer(c) and ocular melanoma(d), among other cancerous conditions.

For more information, visit http://www.isoray.com or call 520/240-4840.