Investigation of the influence of residual 1 H dipole-dipole couplings on magnetization transfer ratio maps of porcine menisci
Christina Hopfgarten 1 , Stefan Kirsch 1 , Gregor Reisig 2 , Michael Kreinest 2 , and Lothar R. Schad 1
Computer Assisted Clinical Medicine,
University Medical Center Mannheim, Heidelberg
University, Mannheim, Germany,
Orthopaedics and Trauma Surgery, Orthopaedic and Trauma
Center Mannheim, University Medical Center Mannheim,
Heidelberg University, Mannheim, Germany
The aim of the experiments was to check, to which extend
the MTR is affected by residual dipole-dipole couplings.
Five porcine medial menisci were investigated. The
transverse relaxation time shows a distinct variation of
T2 values with the orientation of the imaged slice. In
contrast, the MTR values are approximately constant over
the all orientations. The observed absence of the magic
angle (MA) effect in MTR maps may provide a useful tool
for diagnosis of meniscal tissue degeneration since it
prevents misinterpretation due to MA-artifacts.
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