Evaluation of actuation compatibility and homogeneities for MRI-powered ferromagnetic sphere

Zhang, Peng, Wang, Wendong, Shi, Yikai and Yuan, Xiaoqing (2016) Evaluation of actuation compatibility and homogeneities for MRI-powered ferromagnetic sphere. Computer Assisted Surgery, 21 Supp. 1: 169-175. doi:10.1080/24699322.2016.1240312


Author Zhang, Peng
Wang, Wendong
Shi, Yikai
Yuan, Xiaoqing
Title Evaluation of actuation compatibility and homogeneities for MRI-powered ferromagnetic sphere
Journal name Computer Assisted Surgery
ISSN 2469-9322
Publication date 2016-01-01
Sub-type Article (original research)
DOI 10.1080/24699322.2016.1240312
Open Access Status Not yet assessed
Volume 21
Issue Supp. 1
Start page 169
End page 175
Total pages 7
Place of publication Taylor & Francis
Publisher Abingdon, Oxon, United Kingdom
Collection year 2017
Language eng
Formatted abstract
MR-compatibility actuations have been widely investigated for the development of robot-assisted devices under the magnetic resonance imaging (MRI). Ferromagnetic components of MRI-powered can be manipulated remotely using the magnetic force or torque induced by MRI or magnetic field environment. However, (1) numerical analysis of the related factors, geometry and magnitude, influencing the ferromagnetic components, and (2) field non-homogeneities when placed in a uniform main magnetic field B0 are rarely reported. To address the relationship between magnetic force/torque and parameters, different radii of ferromagnetic spheres are required to exert magnetic force and torque with variable magnetic field. Comparison of the field homogeneities error (FHE) under various locations and parameters was investigated. In this study, we present the equivalent model of magnetic field and compare the magnetic force and torque of ferromagnetic sphere under different conditions and provide a safety distance of drive source (ferromagnetic sphere). The numerical models between parameters are established and significant factors were analyzed. Through various parameters of the ferromagnetic sphere, the performance of the numerical model in the magnetic field was evaluated. Cubic polynomial equations were developed to relate magnetic properties of ferromagnetic sphere with R2  > 0.9506. Field homogeneity was not significantly affected when actuation source was installed in 32 cm away from the isocenter.
Keyword FEM
Field homogeneities
MRI-compatibility
MRI-powered
Magnetic actuation
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Information Technology and Electrical Engineering Publications
 
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