A computer based system and method is disclosed for positional guidance in real-time surgical applications using audio feedback. The invention is based on translating the 5 spatial parameters of a surgical instrument or device, such as its position and velocity with respect to a given coordinate system,...http://www.google.co.uk/patents/US6083163?utm_source=gb-gplus-sharePatent US6083163 - Surgical navigation system and method using audio feedback
