Abstract
Multimodal medical volumetric image fusion is a hot topic in medical image processing. Currently, most multi-scale based medical image fusion methods are put forward in two-dimensional space. However, they often fail to deal with multimodal medical volumetric image fusion due to the inaccurate image representation caused by ignoring the correlation between adjacent slices and the inappropriate design of fusion rule based on individual feature. To overcome the above drawbacks, a novel multimodal fusion method using 3-D Shearlet transform and T-S fuzzy reasoning is proposed, named as 3DSTSF. Firstly, the low frequency subbands and high frequency subbands of multimodal medical volumetric images are obtained by using the 3-D Shearlet transform. For comprehensive interpretation of source image, a contextual hidden Markov model is established for 3-D Shearlet transform high frequency subbands to model multiple dependency relationship among coefficients. Then, a fuzzy reasoning rule based on contextual hidden Markov model statistical characteristics, interval type-2 fuzzy entropy and region energy of high-frequency coefficients is designed to fuse high frequency subbands, which can accurately describe volumetric images and avoid introducing false information. Besides, a novel and simple local energy based fusion rule is performed on low frequency subbands to ensure the visual quality of fused image. Finally, the fused medical volumetric image is reconstructed by the inverse 3-D Shearlet transform. A series of experimental results demonstrate the superiority of 3DSTSF.
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Acknowledgements
This work was supported in part by the National Natural Science Foundation of China under Grant 61772237, 61906087, in part by the Six Talent Climax Foundation of Jiangsu under Grant XYDXX-030 and Translational Medicine Special Project of Wuxi Health and Safety Commission under Grant ZZ002 and Natural Science Foundation of Jiangsu Province under Grant BK20180692. Thanks are due to Miss Anqi Wang of Jiangnan university for assistance with the experiments.
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Luo, X., Xi, X., Zhang, Z. et al. Multimodal medical volumetric image fusion using 3-D Shearlet transform and T-S fuzzy reasoning. Multimed Tools Appl 82, 22577–22612 (2023). https://doi.org/10.1007/s11042-022-14266-0
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DOI: https://doi.org/10.1007/s11042-022-14266-0