On October 28, 2005, a Notice of Violation was issued for a Severity Level III problem composed of three violations. The violations involved (1) a programmatic weakness in the licensee's gamma knife stereotactic radiosurgery program which resulted in an overexposure to a patient; (2) the licensee's failure to notify the NRC that the frame of the gamma knife unit, a basic component designed to prevent movement of the head during treatment, did not prevent the change of the treatment site coordinates; and (3) the licensee's failure to report the medical event within the required period.