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Abstract #5053

Accelerated T1ρ Dispersion Data Acquisition for Correlation Time Mapping of Cartilage at 3T

Stefan Zbyn1,2,3, Mikko J. Nissi4, Hassaan Elsayed1,2,3, Victor Casula1,2,3, Matti Hanni1,2,3, Timo Liimatainen5, and Miika T. Nieminen1,2,3

1Research Unit of Medical Imaging, Physics and Technology, University of Oulu, Oulu, Finland, 2Medical Research Center, University of Oulu and Oulu University Hospital, Oulu, Finland, 3Department of Diagnostic Radiology, Oulu University Hospital, Oulu, Finland, 4Department of Applied Physics, University of Eastern Finland, Kuopio, Finland, 5Clinical Imaging Center, Kuopio University Hospital, Kuopio, Finland

Correlation time (τc) is novel MRI parameter that can be calculated from time demanding dispersion measurements of longitudinal relaxation times in the rotating frame (T1ρ). Therefore methods able to accelerate data acquisition are needed for τc mapping of cartilage in vivo. Present results demonstrate that partial k-space acquisition and Parallel Imaging can reduce imaging time while having small influence on τc values. Although long TurboGRE readout train significantly decreases τc values, it allows the τc mapping of cartilage in clinically acceptable measurement times. The τc mapping may therefore serve for the noninvasive in vivo evaluation of cartilage at 3T.

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