Optimal surface segmentation using flow lines to quantify airway abnormalities in chronic obstructive pulmonary disease. - Jens Petersen; Mads Nielsen; Pechin Lo; Lars Haug Nordenmark; Jesper Johannes Holst Pedersen; Mathilde Marie Winkler Wille; Asger Dirksen; Marleen de Bruijne (Medical Image Anal., 2014)