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Rapid magnetic resonance elastography of muscle using one‐dimensional projection
Author(s) -
Bensamoun Sabine F.,
Glaser Kevin J.,
Ringleb Stacie I.,
Chen Qingshan,
Ehman Richard L.,
An KaiNan
Publication year - 2008
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.21307
Subject(s) - magnetic resonance elastography , magnetic resonance imaging , elastography , projection (relational algebra) , radiology , nuclear magnetic resonance , medicine , computer science , physics , ultrasound , algorithm
Purpose To demonstrate the feasibility of 1D MR elastography (MRE) to rapidly assess skeletal muscle stiffness in vivo. Materials and Methods Shear waves were induced in the vastus medialis muscle (VM) using a pneumatic driver at 90 Hz and 2D MRE data were collected. Spatially selective excitations were used to produce 1D projections of MRE data oriented along the direction of propagating waves in the muscle. Data were collected with the thigh muscles relaxed and contracted at 20% maximum voluntary contraction (MVC) and the knee flexed at 30°. Results The muscle stiffness measured at rest and in contraction with 1D MRE was 3.69 ± 0.80 kPa and 9.52 ± 2.74 kPa, respectively, and 4.36 ± 0.98 kPa and 9.22 ± 1.29 kPa, respectively, with the 2D MRE technique. Conclusion Muscle stiffness measured using 1D MRE was in agreement with 2D MRE while reducing the scan time by a factor of 4. J. Magn. Reson. Imaging 2008. © 2008 Wiley‐Liss, Inc.