LCMMethod is an option for HelixAngleCalc and LMCSytemCalc. Can be "CentralAxes" or "WallMap". "CentralAxes" uses wall distance calculation using projection of the centarl axes and circular approximation of the ventricle. This method is fairly fast and uses CentralAxes internaly. "WallMap" uses wall distance interpolation and subsequential gradient calculation. Can take long for high res datasets but is most accurate. Uses CalculateWallMap internaly.