Dr Philippe Katz, M.D., Associate Professor at Université Paris Cité in France, has been working in ENT and Maxillo-Facial Radiology since 1977. In 1985, he was the first in France to use ultrasound examination for salivary pathology. Since then, he developed this technic for a quick approach of the different pathologies. He is the author of many articles, book chapters and books, and still teaches about salivary ultrasound in Paris, London, Toronto, the USA and Spain (La Coroña). Dr Katz is the founder of the Institute for Functional Explorations of the Salivary Glands (Institut d’Explorations Fonctionnelles des Glandes Salivaires) in France, and is a member of the French Radiology Society, European Radiology Society, Radiological Society of North America, AAO-NHS, and of the French ENT society.