2009 Volume 14 Issue 4 Pages 435-444
3D registration between real and virtual human body is a significant issue in AR surgical navigation. However, the matching of markers on surface of the body has a problem of estimating positions inside the body, because human body is not rigid. This paper proposed inside-body registration, which matched pair-line adjacent to a target tissue. Pair-line matching method, which has a high freedom of measured positions and high robustness of measurement errors, is useful, because the method never requires the correspondence of measured points between real and virtual world. In the experiment using a phantom, great vein was used for pair-line and the position of a vessel bifurcation was estimated. The result of experiments showed high robustness of measurement errors in estimating positions. The result using patient data showed sufficient estimation accuracy with even small distance between two measured points for pair-line.
