Computational design and fabrication of portable MRI systems
Name
1227704123-MIT.pdf
Size
17.73 MB
Format
Adobe PDF
Checksum (MD5)
5eaab0d240ff7461dc70aa686ba6f212
Author(s)
McDaniel, Patrick Christopher.
Advisor(s)
Lawrence L. Wald.
Date Issued
2020
Publisher
Massachusetts Institute of Technology
Abstract
In this work, I have developed techniques for designing portable MRI scanners and have applied them to three portable systems for brain imaging. I first describe the procedue for designing a portable, low-field MRI scanner - in particular, how the constraints of compactness and portability affect the design of all system components (magnets, coils, sequences, RF pulses, and reconstruction schemes). I then describe the design of the principal hardware components of a portable MRI system: the B₀ magnet, the magnet shim array, the gradient coils, and the RF coils. This work makes novel use of numerical and computational tools for both sub-system design and physical construction. I next apply this paradigm to the design of gradient coils and a shim magnet array for portable whole-brain MRI scanner and demonstrate in vivo adult brain images. Finally, I describe two novel MRI scanners designed ab ovo using the approach described herein. The former is the "MR Cap", a single-sided MRI device designed for imaging over a reduced 8 x 8 x 3cm³ region of the adult brain; the latter is the "Helmet MRI", a whole-brain scanner optimized specifically for the head geometry.
Description
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, September, 2020
Cataloged from student-submitted PDF of thesis.
Includes bibliographical references (pages 191-212).
Subjects
Electrical Engineering and Computer Science.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Terms of Use
MIT theses may be protected by copyright. Please reuse MIT thesis content according to the MIT Libraries Permissions Policy, which is available through the URL provided.
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