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Image-guided intervention and needle steering for radiofrequency ablation (RFA) of the liver is reviewed in this paper. In particular, the concept of active needle is proposed for RFA treatment. Methods and techniques of image processing and modeling are presented for a stereo liver model. The liver model and constituent components extracted from computerized tomography (CT) images can be used to...
In this paper, we proposed a novel image steganographic method. Considering the visual quality of the stego-image, the pixels of host image are classified into three groups according to the noise visibility function values of the pixels. For each group of pixels, the corresponding secret pixel values go through an optimal substitution process and are transformed into other pixel values. Then the optimal...
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