학술논문
Flexion Effect on the Radiofrequency-Induced Heating for Modular External Fixation
Document Type
Conference
Author
Source
2023 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (USNC-URSI) Antennas and Propagation and USNC-URSI Radio Science Meeting (USNC-URSI), 2023 IEEE International Symposium on. :849-850 Jul, 2023
Subject
Language
ISSN
1947-1491
Abstract
This paper studies the influence of flexion on radiofrequency (RF) – induced heating for patients with modular external fixation under 1.5 Tesla (T) and 3T magnetic resonance imaging (MRI) systems. Four configurations of a modular external fixation are developed to suit different patients' postures. They are applied at the same position on the patient's body. Numerical simulations are performed with patients loaded at three imaging landmarks. RF-induced heating in terms of peak averaged specific absorption rate (SAR) over 1 gram (peak $text{SAR}_{\mathbf{1}\mathbf{g}})$ near the device is evaluated. The variation of peak $\text{SAR}_{\mathbf{1}\mathbf{g}}$ is up to 44% at 1.5T and 48% at 3T due to the flexion of modular external fixation. Therefore, it is recommended flexion impacts should be considered for the RF-induced heating of modular external fixation.