Accuracy of navigation: a comparative study of infrared optical and electromagnetic navigation.
We evaluated the accuracy of navigation systems for measuring the mechanical axis in patients undergoing total knee arthroplasty and in the synthetic bone model. Infrared optical and electromagnetic navigation systems were compared. Both systems were found to be accurate and reproducible in an experimental environment. However, the accuracies of both systems were affected by erroneous registration, and the optical system was found to be more reproducible. In clinical situations, the mean difference was 1.23 degrees, and difference greater than 3 degrees occurred in 15% of clinical trials. These discordances may have been due to ambiguous anatomic landmarks causing registration errors and the possibility of electromagnetic signal interference in the operating room.
Song
Eun Kyoo
EK
Center for Joint Disease, Chonnam National University Hwasun Hospital, 160 Ilsimri, Hwasuneup, Hwasungun, 519809, Jeonnam, Korea.
Seon
Jong Keun
JK
Park
Sang Jin
SJ
Yoon
Taek Rim
TR
D003952:Diagnostic Imaging / Q000379:methods*; D055590:Electromagnetic Phenomena; D005269:Femur / Q000601:surgery*; D006801:Humans; D007259:Infrared Rays; D055096:Optical Devices; D019047:Phantoms, Imaging; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D025321:Surgery, Computer-Assisted / Q000295:instrumentation* / Q000379:methods*