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Phase Unwrapping in Magnetic Resonance Elastography
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作者 Surendra Maharjan Tomokazu Numano +4 位作者 Tetsushi Habe Daiki Ito Takamichi Ueki Keisuke Igarashi Toshiki Maeno 《Open Journal of Medical Imaging》 2018年第4期111-125,共15页
Phase Unwrapping (PU) is an ill-posed problem in Magnetic Resonance Elastography (MRE). The phase information is not usable until the phases are retrieved by using PU algorithms. In this present study, we attempt to d... Phase Unwrapping (PU) is an ill-posed problem in Magnetic Resonance Elastography (MRE). The phase information is not usable until the phases are retrieved by using PU algorithms. In this present study, we attempt to determine the ideal PU method for MRE using both phantom and volunteer psoas major (PM) muscle images. All the MRE experiments were carried out in Philips MRI (Achieva 3.0 T, Best, The Netherlands). A multi-echo gradient-echo MRE pulse sequence was employed and the four PU methods were considered based on their easy user platform. They are namely, Minimum Discontinuity (MD), Laplacian-Based Estimate (LBE), Region Growing (RG) and Dilate-Erode (DE) Propagate. Phantom images were successfully unwrapped by all four methods, whereas MD and LBE could only unwrap PM muscle images properly. RG and DE failed to unwrap the PM muscle images. 展开更多
关键词 Phase Unwrapping Magnetic Resonance ELASTOGRAPHY Minimum DISCONTINUITY Laplacian-Based Estimate Region GROWING dilate-erode PROPAGATE
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