N. BILLERICA, Mass.--(BUSINESS WIRE)--Lantheus Medical Imaging, Inc., a worldwide leader in diagnostic medical imaging, today announced that on December 30, 2010 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 May 10, 2010 in a transaction exempt from registration under the Securities Act of 1933, as amended, in an aggregate principal amount of $250 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.