Certain exemplary method and/or apparatus embodiments herein can include —；acquiring a set of data relative to a patient's maxillofacial region through an x-ray CT imaging apparatus, —；reconstructing two or more types of maxillofacial data volumes from the same acquired set of data, —；displaying at least one slice of the patient's maxillofacial region with a first type of data volume among the volumes (e.g., FDK volume and MAR volume), —；selecting a region of interest (ROI) in the displayed at least one slice, a first portion of said first type of data volume being displayed within the ROI, —；displaying within the selected ROI a second portion of a second type of data volume, the at least one slice of the patient's maxillofacial region being displayed with the first type of data volume while the ROI is displayed with the second portion of the second type of data volume.
