1. A method of generating a patient-matched surgical tool, the method comprising: obtaining first magnetic resonance image data associated with at least a portion of a joint of a patient; obtaining second magnetic resonance image data associated with at least a portion of a second joint; deriving an electronic model of at least a portion of the joint using at least the first magnetic resonance image data; creating a surgical tool using, at least in part, the electronic model; wherein the tool includes a contact surface substantially matched to a corresponding surface of the joint and a guide for directing movement of a surgical instrument; and wherein the position or orientation of the guide relative to the contact surface is adapted at least in part based on information derived from the second magnetic resonance image data.