1. A method of analysis, comprising: generating a series of 3D thermospatial representations, each having thermal data representing the thermal image and 3D spatial data representing a non-planar surface of the body section, said thermal data being associated with said 3D spatial data; for each thermospatial representation, calculating, by a data processor, a surface integral of respective thermal data over respective surface using a correction factor for weighting the value of picture-elements in said thermospatial representation, thereby providing a series of surface integral values; and comparing at least two of said surface integral values, and determining, based on said comparison, the likelihood that a thermally distinguishable region is present in said body section.