This e-textbook on magnetic resonance imaging by the MRI pioneer Peter A. Rinck allows the readers to acquire a basic knowledge to enable them to pursue studies of their own and to cope with some of the most common problems, such as image contrast, contrast agents, pulse sequences and artifacts or questions concerning possible hazards to patients - in other words, the nuts and bolts. The e-textbook is peer-reviewed, non-commercial, independent and free. The journal Radiology stated: 'In summary, this