Abstract
Diffusion magnetic resonance imaging is a technique for non-invasive detection of microstructure in the white matter of the human brain, which is widely used in neuroscience research of the brain. However, diffusion-weighted images(DWI) are sensitive to noise, which affects the subsequent reconstruction of fiber orientation direction, microstructural parameter estimation and fiber tracking. In order to better eliminate the noise in diffusion-weighted images, this study proposes a noise reduction method combining Marchenko-Pastur principal component analysis(MPPCA) and rotation-invariant non-local means filter(RINLM) to further remove residual noise and preserve the image texture detail information. In this study, the algorithm is applied to the fiber structure and the prevailing microstructural models within the human brain voxels based on simulated and real human brain datasets. Experimental comparisons between the proposed method and the state-of-the-art methods are performed in single-fiber, multi-fiber, crossed and curved-fiber regions as well as in different microstructure estimation models. Results demonstrated the superior performance of the proposed method in denoising DWI data, which can reduce the angular error in fiber orientation reconstruction to obtain more valid fiber structure estimation and enable more complete fiber tracking trajectories with higher coverage. Meanwhile, the method reduces the estimation errors of various white matter microstructural parameters and verifies the performance of the method in white matter microstructure estimation.
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Zhu Yuemin and Wang Yuanjun. The first draft of the manuscript was written by Zhu Yuemin and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Zhu, Y., Wang, Y. Brain fiber structure estimation based on principal component analysis and RINLM filter. Med Biol Eng Comput 62, 751–771 (2024). https://doi.org/10.1007/s11517-023-02972-2
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DOI: https://doi.org/10.1007/s11517-023-02972-2