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Abstract #3176

Imaging of calf muscle contraction in pediatric patients with cerebral palsy: comparison of voluntary motion and electrically evoked motion

Claudia Weidensteiner1,2, Xeni Deligianni1,2, Tanja Haas1, Philipp Madoerin1, Oliver Bieri1,2, Meritxell Garcia3, Jacqueline Romkes4, Erich Rutz5, Francesco Santini1,2, and Reinald Brunner6
1Department of Radiology, Division of Radiological Physics, University Hospital Basel, Basel, Switzerland, 2Department of Biomedical Engineering, University of Basel, Basel, Switzerland, 3Department of Radiology, Division of Neuroradiology, University Hospital Basel, Basel, Switzerland, 4Laboratory for Movement Analysis, University Children's Hospital Basel, Basel, Switzerland, 5Hugh Williamson Gait Laboratory, The Royal Children's Hospital Melbourne, Parkville, Australia, 6Department of Orthopedic Surgery, University Children's Hospital Basel, Basel, Switzerland

Aim of this study is to investigate the feasibility of phase contrast imaging at 3T for assessment of muscle function in children with cerebral palsy. Time-resolved cine phase contrast MRI was synchronized with (a) electrical muscle stimulation (EMS) of the calf muscle (b) voluntary plantarflexion following visual instructions. The achieved force was higher for the voluntary task, but its periodicity was lower compared to the stimulated contraction. Therefore, it was not possible to resolve two distinct velocity peaks for voluntary contraction and release, but it was during EMS, in case the tolerated current was high enough to evoke sufficient contraction.

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