A calibration/surgical tool (90, 160) includes an electromagnetic sensor array (30) of two or more electromagnetic sensors in a known geometrical configuration. Electromagnetic tracking errors are characterized by a mapping of pre-operative absolute and relative errors based on a movement of a calibrated calibration/surgical tool (90, 160) through a pre-operative electromagnetic field. Using statistical mapping, a desired absolute error field (46) is measured either in the clinic as the part of daily quality control checks, or before the patient comes in or in vivo. A resulting error field (46) may be displayed to the physician to provide clear visual feedback about measurement confidence or reliability of localization estimates of the absolute errors in electromagnetic tracking.一種校準/外科手術工具(90、160)包含呈一已知幾何組態之兩個或兩個以上電磁感測器之一電磁感測器陣列(30)。藉由基於一經校準之校準/外科手術工具(90、160)穿過一術前電磁場之一移動之術前絕對誤差及相對誤差之一映射來特徵化電磁追蹤誤差。使用統計映射,在臨床中作為日常品質控制檢查之部分或在患者進入之前或在活體內量測一所期望絕對誤差場(46)。可將一所得誤差場(46)顯示給醫師以提供關於電磁追蹤中之該等絕對誤差之局部化估計之量測可信度或可靠性之清晰視覺回饋。20...空間體積21...空間體積22a...電磁波22b...電磁波23...空間體積24...電磁波/術中絕對誤差場/可靠地帶/畸變30...電磁感測器陣列40...資料集41...資料集42...術前誤差映射圖43...術中相對誤差44...術中絕對誤差45...可靠性臨限值
