1. A method for progressive multi-resolution 3D image reconstruction, said method including: acquiring a plurality of input two-dimensional images; calculating an initial three-dimensional image based on at least one of said input images, said initial three-dimensional image including a plurality of voxels, and reconstructing said three-dimensional image data in a subset of said voxels to create a higher resolution three-dimensional image in a displayed image area corresponding to said voxel subset.