Stefan Sommer1,2, Tom Hilbert3,4,5, Constantin von Deuster1,2, Natalie Hinterholzer2, Markus Klarhöfer1, and Daniel Nanz2,6
1Siemens Healthcare, Zurich, Switzerland, 2Swiss Center for Musculoskeletal Imaging (SCMI), Balgrist Campus, Zurich, Switzerland, 3Advanced Clinical Imaging Technology (ACIT), Siemens Healthcare, Lausanne, Switzerland, 4Department of Radiology, Lausanne University Hospital (CHUV), Lausanne, Switzerland, 5LTS5, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland, 6University of Zurich, Zurich, Switzerland
1Siemens Healthcare, Zurich, Switzerland, 2Swiss Center for Musculoskeletal Imaging (SCMI), Balgrist Campus, Zurich, Switzerland, 3Advanced Clinical Imaging Technology (ACIT), Siemens Healthcare, Lausanne, Switzerland, 4Department of Radiology, Lausanne University Hospital (CHUV), Lausanne, Switzerland, 5LTS5, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland, 6University of Zurich, Zurich, Switzerland
Mapping of short-T2* times is clinically feasible in under 3 minutes using a multi-echo UTE sequence in combination with
compressed sensing reconstruction.
Fitting results showing the initial signal strength
(proportional to the transverse magnetization, M0) and R2* maps for
the fully sampled (R=1), twice under-sampled (R=2) and four-fold under-sampled
(R=4) acquisitions in three orthogonal planes. Identical scaling was used for
all M0 [normalized signal intensity] and R2* [ms-1] maps.
Magnitude images and phase maps of a sagittal
slice. Fully sampled (R=1, top), two-fold (R=2), and four-fold (R=4) under-sampled (bottom)
datasets are shown for each of the 5 echoes (left to right), prior to R2*
fitting.
