Feedback Control of Phased Array Electromagnetic Hyperthermia Using MRI Temperature Mapping
Behnia, Babak
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https://hdl.handle.net/2142/80758
Description
Title
Feedback Control of Phased Array Electromagnetic Hyperthermia Using MRI Temperature Mapping
Author(s)
Behnia, Babak
Issue Date
2002
Doctoral Committee Chair(s)
Andrew G. Webb
Department of Study
Electrical and Computer Engineering
Discipline
Electrical and Computer Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Health Sciences, Radiology
Language
eng
Abstract
This work focuses on closed loop control of microwave hyperthermia using noninvasive MRI thermometry. The following developments are reported here: (1) An integrated MR-microwave hyperthermia system intended for small animal studies was designed and built. (2) A new technique is presented that allows noninvasive mapping of the relative phase patterns of the microwave fields inside a phantom. (3) An MRI-based technique is presented for closed loop spatial steering of the hot spot in a phased array system. (4) Noninvasive techniques are demonstrated that allow focusing of small-wavelength microwave fields into a heterogeneous medium. Temporal and spatial control of microwave heating are demonstrated that represent typical clinical applications.
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