WFUMB is a Federation of Affiliated Organizations consisting of Regional Federations. The Regional Federations cover National Societies of Ultrasound in Europe (EFSUMB), in Asia (AFSUMB), in North America (AIUM), in Latin America (FLAUS), in Australasia (ASUM) and in Africa (MASU). Presently the total number of individual members is almost 50,000, and these are physicians, scientists, engineers and ultrasonographers.