Fig. 2.

Examples of 2D/3D registration based on AP and lateral radiographs by different DL models. The first two columns show the lateral and AP input radiographs overlapped with the contours of the DRRs from the predicted 3D image volume. The third column shows a coronal slice of the warped atlas volume with the deformation grid. The fourth column shows a coronal slice of the predicted segmentation map, overlaid on top of the ground-truth image. The last column shows the geometric reconstruction error between the reconstructed and ground-truth surface model