Our society is more fitness-conscious than ever. Children and adolescents, especially females, are more involved in sports then they were a generation ago. Elite athletes expect imaging to be interpreted instantly with the correct diagnosis and baby boomers are working out in record numbers. On top of this, new knowledge and developments in MR imaging technology are difficult to find in books, which take years to write and publish while clinicians are demanding that radiologists know the material. This issue is one, which will be referred to repeatedly.