The International Contrast Ultrasound Society recently filed a petition with the FDA to remove the black box warning from ultrasound contrast agents used in the USA.  These IV medications have been proven time after time to be safe and effective, yet the FDA is persistent with its invalid warnings.  I am a member of the ICUS, and I support the move, and hope the FDA will consider this petition, as well as consider allowing use of IV ultrasound contrast agents in other areas of diagnostic ultrasound like many other nations.  

CHICAGO, Oct 03, 2011 (BUSINESS WIRE) -- Cross-specialty international medical experts filed a Citizen Petition with the FDA today, asking the agency to remove boxed warnings from ultrasound contrast agents, stating that the warnings deter use of a safe, inexpensive and radiation-free diagnostic imaging tool with potential life-saving benefits for patients. 

http://www.marketwatch.com/story/citizen-petition-seeks-removal-of-boxed-warnings-on-ultrasound-contrast-agents-new-safety-data-cited-2011-10-03