This book is to update the knowledge of diagnostic imaging with recent technologies & advances including nanoparticles in dentistry. It also discusses the present & future applications of these technologies in dentistry. The text has been presented in its simplest form for both undergraduates & postgraduates & at the same time provides indepth information to use it as a reference tool. It will also provide clinicians with knowledge of proper application of imaging modalities for better diagnosis & treatment planning.