Image fusion enhancement of deformable human structures using a two-stage warping-deformable strategy: A content-based image retrieval consideration |
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Authors: | Fuk-hay Tang H S Horace Ip |
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Affiliation: | (1) Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Yuk Choi Road, Hung Hum, Kowloon, Hong Kong;(2) Department of Computer Science, The City University of Hong Kong, Tat Chee Road, Kowloon Tong, Kowloon, Hong Kong |
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Abstract: | In medical image registration and content-based image retrieval, the rigid transformation model is not adequate for anatomical
structures that are elastic or deformable. For human structures such as abdomen, registration would involve global features
such as abdominal wall as well as local target organs such as liver or spleen. A general non-rigid registration may not be
sufficient to produce image matching of both global and local structures. In this study, a warping-deformable model is proposed
to register images of such structures. This model uses a two-stage strategy for image registration of abdomen. In the first
stage, the global-deformable transformation is used to register the global wall. The warping-transformation is used in second
stage to register the liver. There is a good match of images using the proposed method (mean similarity index = 0.73545).The
image matching correlation coefficients calculated from eight pairs of CT and MR images of abdomen indicates that the warping-deformable
transformation gives better matching of images than those without transformation (p < 0.001, paired t-test). This study has established a model for image registration of deformable structures. This is particularly important
for data mining of image content retrieval for structures which are non-rigid. The result obtained is very promising but further
clinical evaluation is needed |
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