A Disturbance Rejection Method for Displacement Estimation of Carotid Wall

doi:10.3969/j.issn.0372-2112.2017.12.011

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ACTA ELECTRONICA SINICA ›› 2017, Vol. 45 ›› Issue (12) : 2903-2908. DOI: 10.3969/j.issn.0372-2112.2017.12.011

A Disturbance Rejection Method for Displacement Estimation of Carotid Wall

ZHANG Qing-hui^1,2, ZHANG Yu-feng¹, LIN Wen-jing¹, ZHOU Yi¹, ZHANG Ke-xin³, GAO Lian¹

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Abstract

The disturbances caused by the instability of probe hold and the breathing exercise from subjects,are introduced during B-ultrasound examination.It decreases the measuring accuracy of the arterial wall displacement obtained from the B-Mode images by speckle tracking method.Thus,we propose a global rigid-registration method based on phase images of B-Mode images to eliminate these external disturbances.The phase features are obtained from B-Mode images via Riesz transform and difference of Gaussian filters.To improve the speed of searching optimization and the registration accuracy,a stepwise registration method is applied based on position weighted principal axis and centroid method combined with mutual information.The results show that,compared with these schemes of extracting wall displacement directly from B-Mode or phase images by speckle tracking method,this scheme can effectively remove these disturbances,and significantly improve the estimation accuracy.The proposed method can also be used in image registration of cardio-cerebro diseases.

Key words

B-Mode ultrasound / vessel wall pulsatile detection / rigid registration / phase feature / principal axis and centroid method / speckle tracking / mutual information / speckle reducing anisotropic diffusion

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ZHANG Qing-hui, ZHANG Yu-feng, LIN Wen-jing, ZHOU Yi, ZHANG Ke-xin, GAO Lian. A Disturbance Rejection Method for Displacement Estimation of Carotid Wall[J]. Acta Electronica Sinica, 2017, 45(12): 2903-2908. https://doi.org/10.3969/j.issn.0372-2112.2017.12.011

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