1. A method for automatic pelvis unfolding from a 3D medical image, comprising: receiving a 3D medical image; segmenting pelvis anatomy in the 3D medical image; and reformatting the 3D medical image to visualize an unfolded pelvis based on one of a flat medial surface that is a 2D surface fit within the segmented pelvis anatomy or a mesh slab fit to the pelvis in the 3D medical image.