A system and method for registering pre-operative magnetic resonance (MR) images with intra-operative MR images is disclosed. A pre-operative MR image of an object is received. A set of intra-operative MR images of the object is received. The pre-operative MR image is rigidly registered with the initial...http://www.google.com/patents/US7711405?utm_source=gb-gplus-sharePatent US7711405 - Method of registering pre-operative high field closed magnetic resonance images with intra-operative low field open interventional magnetic resonance images