Affiliations: [a] Department of Biomedical Engineering, The Fourth Military Medical University, Xi’an, China | [b] Drug and Instrument Supervision and Inspection Station, Xining Joint Logistics Support Center, Lanzhou, China
Correspondence:
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Corresponding authors: Canhua Xu, Department of Biomedical Engineering, The Fourth Military Medical University, Xi'an, 710032, China. E-mail: canhuaxu@fmmu.edu.cn and Ruigang Liu, Department of Biomedical Engineering, The Fourth Military Medical University, Xi'an, 710032, China. E-mail: ruigang@fmmu.edu.cn
Abstract: Magnetic induction tomography (MIT) has been proposed as a novel, non-invasive, and non-contact technique for diagnosing brain injuries. The design of the hardware system of MIT is a challenging research area. In this study, we constructed a 16-coil MIT simulation model with an actual cranio-cerebral anatomical structure in COMSOL. We analysed the factors which influence the MIT signal by constructing different types of haemorrhagic stroke models. In addition, the safety of MIT devices was evaluated in detail using the specific absorption rate. The results show that the phase noise of the hardware data acquisition system should be less than 0.001° for the detection of a small peripheral haemorrhage with 5 mL. The result of the specific absorption rate shows that the security of MIT equipment should not be overlooked, and we need to establish a trade-off between signal intensity and device security. This study can provide data to support additional improvements in the performance of hardware systems in the future.
Keywords: Head model, magnetic induction tomography, numerical simulation, three-dimensional modelling
