Abstract
Objective: To develop a measurement method for interleaved acquisition of 1H and 31 STEAM localised spectra of exercising human calf muscle. Materials and Methods: A non-magnetic exercise rig with a pneumatic piston and sensors for force and pedal angle was constructed to enable plantar flexion measured in the 3 T MR scanner, which holds the dual tuned (1H ,31P) surface coil used for signal transmission and reception. Results: 31 spectra acquired in interleaved mode benefit from higher Signal to noice ratio (factor of 1.34 ±0.06 for PCr) compared to standard acquisition due to the Nuclear Overhauser effect and substantial PCr/Pi changes during exercise can be observed in 31P spectra. 1H spectral quality is equal to that in single mode experiments and allows Cr2 changes to be monitored. Conclusion: The feasibility of dynamic interleaved localised 1H and 31P spectroscopy during plantar flexion exercise has been demonstrated using a custom-built pneumatic system for muscle activation. This opens the possibility of studying the dynamics of metabolism with multi nuclear MRS in a single run.
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Meyerspeer, M., Krššák, M., Kemp, G.J. et al. Dynamic interleaved 1H/31P STEAM MRS at 3 Tesla using a pneumatic force-controlled plantar flexion exercise rig. MAGMA 18, 257–262 (2005). https://doi.org/10.1007/s10334-005-0014-y
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DOI: https://doi.org/10.1007/s10334-005-0014-y