11th World Congress on Industrial Process Tomography
Sensitivity and Phase Response Analysis of Open MIT Sensor Arrays for Hemorrhage Detection
Y. X. Chen, C.Tan, F. Dong*
Tianjin Key Laboratory of Process Measurement and Control
School of Electrical and Information Engineering, Tianjin University, Tianjin, China
*Email: fdong@tju.edu.cn
ABSTRACT
Magnetic induction tomography (MIT) is an attractive technology in hemorrhage detection due to the non-radioactive, non-invasive and contactless features. To enhance the sensitivity near the hemorrhage and improve the detection accuracy, the open MIT sensor arrays based on the local detection method were designed. In this study, we evaluate and compare the performance of the open MIT sensor arrays with different structures: cambered array, planar array with Bx sensors, and planar array with gradiometers in hemorrhage detection based on the sensitivity and phase response analysis. In numerical simulation, 3D anatomical head models with hemorrhages in different volumes and the models of the three open MIT sensor arrays were established. To quantitatively evaluate the sensitivity and the phase response under different open sensor arrays, the intensity of the sensitivity , the intensity of the hemorrhage phase shift and the useful signal to background signal ratio were calculated. In the sensitivity analysis, the results indicate that the planar array with gradiometers performs better in , which is respectively 3 times and 22 times higher than the planar array with Bx sensors and the cambered array. In the evaluation of the phase response, the results reveal that the planar array with gradiometers provides larger and than the others, which will improve the accuracy and robustness in hemorrhage detection.
Keywords: Magnetic induction tomography, open sensor array, sensitivity analysis, hemorrhage detection
Industrial Application: Healthcare, medical engineering
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