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ORCID
N/A
Access Type
Open Access Thesis
Document Type
thesis
Degree Program
Mechanical Engineering
Degree Type
Master of Science (M.S.)
Year Degree Awarded
2017
Month Degree Awarded
May
Abstract
The product of this thesis aims to enable the study of the biochemical and physical dynamics of the lower limbs at high levels of muscle tension and fast contraction speeds. This is accomplished in part by a magnetic resonance (MR) compatible ergometer designed to apply a load as a torque of up to 420 Nm acting against knee extension at speeds as high as 4.7 rad/s. The system can also be adapted to apply the load as a force of up to 1200 N acting against full leg extension. The ergometer is designed to enable the use of magnetic resonance spectroscopy and imaging in a three Tesla Siemens Skyra MRI system. Due to the electromagnetic limitations of having the device operate inside the magnet, the design is split into two components. One designed to fit inside the 70 cm bore of the scanner. This component is electromagnetically passive; made out of materials exhibiting minimal magnetic interference, and having no electrically powered parts. The other component is electromagnetically active; it contains all of the powered elements and actuates the passive part from another room. A tensioned cable transmits power through a waveguide; a pipe through the wall of the MRI room with an RF shield. The device was tested applying a sagittal plane moment on the knee joint during isometric, isokinetic, isotonic, and constant power contractions.
DOI
https://doi.org/10.7275/9982601
First Advisor
Frank C Sup
Second Advisor
Jane A Kent
Third Advisor
James R Rinderle
Recommended Citation
Jaber, Youssef, "A Magnetic Resonance Compatible Knee Extension Ergometer" (2017). Masters Theses. 507.
https://doi.org/10.7275/9982601
https://scholarworks.umass.edu/masters_theses_2/507
Included in
Biomechanical Engineering Commons, Biomechanics Commons, Biomedical Commons, Biomedical Devices and Instrumentation Commons, Controls and Control Theory Commons, Electro-Mechanical Systems Commons