Press Release Details

No. BILLERICA, Mass. (April 11, 2011) – Lantheus Medical Imaging, Inc., a worldwide leader in diagnostic medical imaging, today announced that on April 8, 2011 it commenced an exchange offer for eligible holders to exchange any and all of the company’s outstanding unregistered 9.75% Senior Notes due 2017. These notes were originally issued on March 21, 2011 in a transaction exempt from registration under the Securities Act of 1933, as amended, in an aggregate principal amount of $150 million. Eligible holders of these notes may exchange them for an equal principal amount of the company’s registered 9.75% Senior Notes due 2017. The terms of the registered notes are substantially identical to the unregistered notes, except for transfer restrictions and registration rights relating to the unregistered notes.

The exchange offer will expire at 5:00 p.m., Eastern Time on May 9, 2011, unless extended in accordance with its terms. Exchanges of the unregistered notes must be made in accordance with the terms of the exchange offer before the exchange offer expires and may be withdrawn at any time before the exchange offer expires.

Documents describing the terms of the exchange offer, including the prospectus and transmittal materials for making exchanges, can be obtained from the exchange agent addressed as follows:

By Mail, Hand or Overnight Delivery:
Wilmington Trust FSB
c/o Wilmington Trust Company
Corporate Capital Markets
Rodney Square North
1100 North Market Street
Wilmington, DE 19890-1626

By Facsimile:
(302) 636-4139

For Information or Confirmation by Telephone:
(302) 636-6181

This press release shall not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of such securities in any state or other jurisdiction in which such offer, solicitation, or sale would be unlawful prior to registration or qualification under the securities laws of such state or other jurisdiction. The exchange offer is being made only by means of a written prospectus.

About Lantheus Medical Imaging, Inc.
Lantheus Medical Imaging, Inc., a worldwide leader in diagnostic medicine for more than 50 years, is dedicated to creating and providing pioneering medical imaging solutions to improve the treatment of human disease. The company’s proven success in discovering, developing and marketing innovative medical imaging agents provides a strong platform from which to bring forward breakthrough new tools for the diagnosis and management of disease. Lantheus imaging products include the echocardiography contrast agent DEFINITY® Vial for (Perflutren Lipid Microsphere) Injectable Suspension, ABLAVAR® (gadofosveset trisodium), a first-in-class magnetic resonance agent indicated for the evaluation of aortoiliac occlusive disease in adults with known or suspected peripheral vascular disease, TechneLite® (Technetium Tc99m Generator), Cardiolite® (Kit for the Preparation of Technetium Tc99m Sestamibi for Injection), and Thallium 201 (Thallous Chloride Tl 201 Injection). Lantheus has more than 600 employees worldwide with headquarters in North Billerica, Massachusetts, and offices in Puerto Rico, Canada and Australia. For more information, visit www.lantheus.com.

Safe Harbor for Forward-Looking and Cautionary Statements
This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Such forward-looking statements are subject to risks and uncertainties that may be described from time to time in our filings with the Securities and Exchange Commission, including, but not limited to, the consummation of the exchange offer. Factors which could materially affect such forward-looking statements are described in such filings. Readers are cautioned not to place undue reliance on the forward-looking statements contained herein, which speak only as of the date hereof. The company undertakes no obligation to publicly update any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by law.