COMPUTER-AIDED POSITIONING METHOD AND SYSTEM

摘要

A method and apparatus are disclosed for ascertaining the trajectory of an object in relation to an anatomical structure for use with computer assisted surger y by identifying at least three landmarks associated with the anatomical structur e in an operative area; defining a first plane using at least two landmarks; definin g a second plane using at least two landmarks, wherein at least one landmark is different, said second plane being orthogonal to the first plane, such as to define a three dimensional coordinate system; and using the coordinate system to ascertain the trajectory of any object with respect to the anatomical structure. Exposure to imaging radiation and additional surgical procedure is minimized .