Fabrication and Testing of a Microchannel Network Phantom for MRI Velocimetry
Honecker, Sharon Lynne
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https://hdl.handle.net/2142/83840
Description
Title
Fabrication and Testing of a Microchannel Network Phantom for MRI Velocimetry
Author(s)
Honecker, Sharon Lynne
Issue Date
2005
Doctoral Committee Chair(s)
Georgiadis, John G.
Department of Study
Mechanical Engineering
Discipline
Mechanical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Mechanical
Language
eng
Abstract
The MRI velocity maps scale with the Reynolds number of the flow. The theoretical average velocity distribution in a single channel is compared to the experimental distribution, with a consistent over-prediction of velocity near the channel edges. Slice thickness, order of image acquisition, partial volume effects, and acceleration effects are investigated, and show little effect on the measured flow rates. Examination of anatomical MR images show that the channels decreased in height during fabrication, which explains some of the over-prediction in flow rates. The remainder of the discrepancy is attributed to random error caused by a combination of a high value of the maximum encoded velocity and a low signal to noise ratio of the images.
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