The use of radiographs as a diagnostic tool has become an indispensable routine in endodontic therapy. Even with the best intentions and refined technique, images acquired using conventional intra-oral radiographs reveal information in two-dimensions only (height and width) limiting valuable information in the third dimension i.e.,"depth of the lesion". Besides this, the inherent problems of positioning image receptors in the ideal position in relation to the anatomical area of interest, anatomic noise, under or over- estimation of actual healing or failure of endodontic treatment limits the...