MP2UTE: T1 mapping of short-T2 components
Stefan Sommer1,2,3, Tom Hilbert3,4,5, Tobias Kober3,4,5, Natalie Hinterholzer2, Daniel Nanz2,6, and Constantin von Deuster1,2,3
1Siemens Healthcare AG, Zurich, Switzerland, 2Swiss Center for Musculoskeletal Imaging (SCMI), Balgrist Campus, Zurich, Switzerland, 3Advanced Clinical Imaging Technology (ACIT), Siemens Healthcare AG, Lausanne, Switzerland, 4Department of Radiology, Lausanne University Hospital (CHUV), Lausanne, Switzerland, 5LTS5, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland, 6University of Zurich, Zurich, Switzerland
T1 mapping of species with very fast T2/T2* relaxation is impossible with conventional methods measuring echoes refocused by gradients or radiofrequency pulses. We therefore present a new approach to estimate T1 relaxation times of short-T2 tissue such as bone, tendon, or ligament by sampling transversal magnetization at different inversion times with a short-T2 sensitive ultra-short-TE readout. The presented T1 mapping method is efficient and B1-insensitive. By acquiring multiple echoes, it is possible to obtain T1 relaxation times at short and long echo-time and therefore assess the influence of short-T2 components.
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