The FDA issued a news report on November 9, 2010 stating that patients were exposed to high amounts of radiation from improperly used computed tomography brain scans.  The FDA then says that when properly used, the machine was in good working order. The FDA states that the high radiation the patients received was most likely due to the improper use of the machine. Due to this mishap, the FDA wrote a letter and will hold a discussion with the manufacturers in order to help reduce future problems. The report from the FDA can be found HERE.