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Dynamic magnetic resonance imaging of muscle function after surgery

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Authors and Affiliations

  1. Department of Bioengineering, Room S-348, 318 Campus Dr., Stanford University, Stanford, CA, 94305, USA

    Deanna S. Asakawa & Scott L. Delp

  2. Department of Mechanical Engineering, Stanford University, Stanford, CA, USA

    Deanna S. Asakawa & Scott L. Delp

  3. Departments of Mechanical & Aerospace Engineering and Biomedical Engineering, University of Virginia, Charlottesville, VA, USA

    Silvia S. Blemker

  4. Department of Radiology, Stanford University, Stanford, CA, USA

    Garry E. Gold

Authors
  1. Deanna S. Asakawa
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  2. Silvia S. Blemker
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  3. Garry E. Gold
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  4. Scott L. Delp
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Corresponding author

Correspondence to Deanna S. Asakawa.

Electronic supplementary material

Video Captions (ESM)

Video 1

Sagittal-plane cine phase contrast MR images of the lower limb of an adult control subject during knee extension and flexion. The rectus femoris and vastus intermedius muscles (knee extensors) are seen anterior to the femur, and the hamstrings muscles (knee flexors) are visible posterior to the femur (MOV 3,146 kb)

Video 2

Axial-plane cine phase contrast MR velocity images of the thigh of an adult control subject during knee extension and flexion. The femur is visible in the center of the thigh, with the rectus femoris and vasti muscles anterior to (above) the femur, and the hamstrings muscles posterior to (below) the femur. The velocity of the muscle tissue is depicted in the grayscale value of the pixels. The rectus femoris and vasti muscles have similar velocity and move in the opposite direction of the hamstrings muscles (MOV 1,080 kb)

Video 3

Sagittal-plane cine phase contrast MR images of the lower limb of a subject with cerebral palsy after rectus femoris transfer surgery during knee extension and flexion (MOV 3,146 kb)

Video 4

Axial-plane cine phase contrast MR velocity images of the thigh of a subject with cerebral palsy after rectus femoris transfer surgery during knee extension and flexion. The velocity of the rectus femoris is slower than that of the vastus intermedius, but in the same direction as the vastus intermedius, indicating that the muscle remains a knee extensor after surgery (MOV 3,146 kb)

Video Legend

+20 cm/s

−20 cm/s

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Asakawa, D.S., Blemker, S.S., Gold, G.E. et al. Dynamic magnetic resonance imaging of muscle function after surgery. Skeletal Radiol 35, 885–886 (2006). https://doi.org/10.1007/s00256-006-0163-8

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  • DOI: https://doi.org/10.1007/s00256-006-0163-8

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