查看文章

The most widely used clinical magnetic resonance imaging techniques for the diagnosis of parenchymal disease employ heavily T₂-weighted sequences to detect an increase or decrease in the signal from long T₂ components in tissue. Tissues also contain short T₂ components that are not detected or only poorly detected with conventional sequences. These components are the majority species in tendons, ligaments, menisci, periosteum, cortical bone and other related tissues, and the minority in many other tissues that have predominantly long T₂ components. The development and clinical application of techniques to detect short T₂ components are just beginning. Such techniques include magic angle imaging, as well as short echo time (TE), and ultrashort TE (Ute) pulse sequences. Magic angle imaging increases the T₂ of highly ordered, collagen-rich tissues such as tendons and ligaments so signal can be …