An apparatus for use in simulated image guided surgery comprises a positional transducer, clamping means located proximate to the transducer, and a processor. The transducer is responsive to a thin flexible member that can be manipulated by a user, and produces signals representative of displacement...http://www.google.co.uk/patents/US6538634?utm_source=gb-gplus-sharePatent US6538634 - Apparatus for the simulation of image-guided surgery
