Objectives: At the end of the lecture series, the graduate students should be able to: 1. Understand the basic radiographic anatomy of the maxilla, mandible, teeth and supporting tissues using plain intraoral films, computerized tomography and magnetic resonance imaging. 2. Differentiate between paralleling and bisecting angle techniques as used in intraoral radiography and be able to use either of the techniques in various clinical situations. 3. Understand the concepts of standardization in terms of film position and tube position to be able to use similar techniques for clinical research. 4. Understand the concepts in advanced radiophysics, in particular the modern designs in the construction of x-ray tubes and utilization of alternating current and direct current in the production of x-rays 5. Understand the principles of radiobiology and protection, including the safety of the operator and patient, maximum permissible doses, and shielding calculations for operatories. 6. Use the principles of radiographic interpretation for identification and differentiation of all bony lesions, changes in the densities of bone, and bone regeneration. 7. Know the different types of radiographic assessment for implant placement, and understand the causes of implant failure as related to the bone quality. 8. Understand the panoramic anatomy and different types of tomography. 9. Know the concepts of digital radiology including the charged couple devices and the active pixel sensors used commonly in image capture and understand the resolution differences between the plain films and digital images. 10. Be knowledgeable of other extraoral radiographic techniques like sialography, arthrography and radionuclide imaging