Problem Statement and Motivation Key Achievements and Future Goals Technical Approach Numerical Modeling of MR Imaging of the Human Head James C. Lin, Electrical and Computer Engineering and Bioengineering Primary Grant Support: Magnetic Health Science Foundation To analyze the physiological response of radiofrequency (RF) power deposition during magnetic resonance imaging (MRI) with head-specific volume coils. • At the highest power levels currently allowed in MRI for head volume coils, there is little effect from the physiological response. • To assess the possibility that at higher power levels or in different types of coils (such as extremity or whole-body coils) the physiological response may have more significant effects. FDTD methods are used to calculate RF power deposition and temperature elevation in MRI of the human head within volume coils from 64–400 MHz at different power levels both with and without consideration of temperature- induced changes in rates of metabolism, perspiration, radiation, and perfusion. 64M H z 200M H z 300M H z 340M H z 400M H z 64M H z 200M H z 300M H z 340M H z 400M H z

Numerical Modeling of MR Imaging of the Human Head

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Numerical Modeling of MR Imaging of the Human Head. James C. Lin, Electrical and Computer Engineering and Bioengineering Primary Grant Support: Magnetic Health Science Foundation. - PowerPoint PPT Presentation

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Page 1: Numerical Modeling of MR Imaging of the Human Head

Problem Statement and Motivation

Key Achievements and Future GoalsTechnical Approach

Numerical Modeling of MR Imaging of the Human Head James C. Lin, Electrical and Computer Engineering and Bioengineering

Primary Grant Support: Magnetic Health Science Foundation

To analyze the physiological response of radiofrequency (RF) power deposition during magnetic resonance imaging (MRI) with head-specific volume coils.

• At the highest power levels currently allowed in MRI for head volume coils, there is little effect from the physiological response.

• To assess the possibility that at higher power levels or in different types of coils (such as extremity or whole-body coils) the physiological response may have more significant effects.

FDTD methods are used to calculate RF power deposition and temperature elevation in MRI of the human head within volume coils from 64–400 MHz at different power levels both with and without consideration of temperature- induced changes in rates of metabolism, perspiration, radiation, and perfusion.

64MHz 200MHz 300MHz 340MHz 400MHz64MHz 200MHz 300MHz 340MHz 400MHz