1. An image processing apparatus, comprising a data receiving unit configured to receive medical imaging data; a registration unit configured to obtain a registration of the medical imaging data and model-based virtual anatomy data by determining a transformation between a coordinate space of the medical imaging data and a coordinate space of the virtual anatomy data based on the locations of anatomical landmarks in the medical imaging data and the locations of corresponding anatomical landmarks in the virtual anatomy data, wherein the model-based virtual anatomy data comprises a synthetic, non-patient specific representation of generic human anatomy in three dimensions; a virtual image generator configured to render images derived at least in part from the virtual anatomy data, the medical imaging data, and the registration obtained by the registration unit; a display configured to display the rendered images wherein at least one of the rendered images is derived from the medical imaging data and at least one of the rendered images is derived from the virtual anatomy data; and a processing unit configured to display in a first frame a medical image derived from the medical imaging data and to display in a second frame a virtual anatomy image derived from the virtual anatomy data, wherein the medical image in the first frame and the virtual anatomy image in the second frame are aligned in accordance with the registration of the medical imaging data with the virtual anatomy data.