KENNEWICK, Wash., April 22, 2008 (PRIME NEWSWIRE) -- Advanced Medical Isotope Corporation (“AMIC”) (Pink Sheets:ADMD) (http://www.isotopeworld.com), a company engaging in the production and distribution of medical isotopes, has retained the Investor Relations Group, Inc. (“IRG”), a thirteen-year-old, highly-recognized corporate communications firm based in New York City, to serve as its national public relations and investor relations firm.