Rapid Local Specific Absorption Rate Estimation for Magnetic Resonance Imaging

Author

Shumin Wang ; Yu Shao ; Shizhe Li

Author_Institution

Dept. of Electr. & Comput. Eng., Auburn Univ., Auburn, AL, USA

Volume

56

Issue

4

fYear

2014

fDate

Aug. 2014

Firstpage

771

Lastpage

779

Abstract

The local specific absorption rate (SAR) is a critical concern of the safety in high-field magnetic resonance imaging (MRI). In order to provide rapid and subject-specific local SAR evaluation, a hybrid numerical technique that combines fast direct method of moments (MoM) and the finite-difference time-domain (FDTD) method was developed. Its validity was demonstrated by comparing with conventional numerical methods and experimental results. An example with a real human head model was further provided to demonstrate its utility.

Keywords

biological effects of fields; biomedical MRI; finite difference time-domain analysis; method of moments; FDTD method; MRI; MoM; fast direct method of moments; finite-difference time-domain method; hybrid numerical technique; magnetic resonance imaging; rapid local specific absorption rate estimation; real human head model; subject-specific local SAR evaluation; Coils; Finite difference methods; Magnetic resonance imaging; Method of moments; Phantoms; Radio frequency; Time-domain analysis; Hybrid numerical method; magnetic resonance imaging (MRI); specific absorption rate (SAR);

fLanguage

English

Journal_Title

Electromagnetic Compatibility, IEEE Transactions on

Publisher

ieee

ISSN

0018-9375

Type

jour

DOI

10.1109/TEMC.2013.2287881

Filename

6658865