title: Quantitative measurement of periodontal bone changes by digital subtraction.
mesh_terms: D000539:Alveolar Process / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D003198:Computer Simulation; D006801:Humans; D008334:Mandible / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D011856:Radiographic Image Enhancement; D013382:Subtraction Technique