I have an algorithm to automatically detect four seed points in the aorta (one at the bottom of the descending aorta, one at the end of the ascending aorta, and ascending and descending in a middle slice). It seems that vmtklevelsetsegmentation colliding fronts does a good job of connecting these seed points together (I do it by initialising three different branches and connecting them together - see pictures). If I have the coordinates of these four seed points, is there a good way for me to run the segmentation via the command line?