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- W2384105384 abstract "This paper propose an efficient denoising and segmentation method for knee MR images based on multi-echo. Conventional methods have applied various segmentation algorithms using a single MR image, but multi-echo MR images provide a variety of characteristics and information in a layer according to echo time. First, the pre-processing is implemented using a non-local means (NLM) algorithm in order to remove noise occurred in acquisition process of MRI. As a supervised learning process, echo-pattern vectors representing nine tissues are computed from the ground truth data extracted manually by a human expert. Then, in the test process each echo-pattern vector is classified by spectral matching algorithms such as Euclidean distance (ED), Spectral angle mapper (SAM), and normalized SAM (NSAM) which is an improved version of SAM to overcome a weakness of the conventional spectral matching method. Among them, NSAM shows the best classification accuracy both before and after the noise removal using NLM filter. The experimental results demonstrate that the meniscus and the boundary of cartilage are efficiently classified by comparison with T2 mapping image which is clinically used for diagnosing osteoarthritis." @default.
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- W2384105384 date "2011-01-01" @default.
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- W2384105384 title "Efficient Denoising and Segmentation of Multi-echo Knee MR (Magnetic Resonance) Images" @default.
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