1. A method for generating a three-dimensional implant shape of a medical device comprising: rendering a volumetric image at least a portion of a patient from image data of the patient; extracting a region of interest from the volumetric image of the patient, wherein the volumetric image comprises target tissue of interest of a patient; matching a computer-rendered three-dimensional template onto a computer-rendered three dimensional surface of tissue surrounding the patient's target tissue of interest; producing a three-dimensional shape that fits the patient's target tissue of interest from computer-readable data representing the matched template; and producing a three-dimensional shape of a medical device from the three-dimensional shape that fits the patient's target tissue of interest.