The present invention employs a unique method that allows a user to create at least one standard pattern about how a particular type of x-ray examination of a body part of a patient is routinely performed, then monitors the machine when a operator uses it to perform this same type of examination. The...http://www.google.co.uk/patents/US6282513?utm_source=gb-gplus-sharePatent US6282513 - Quality assurance method for a machine and an operator
