Title: Multimodality medical image fusion using non-subsampled rotated wavelet transform for cancer treatment

Authors: Satishkumar S. Chavan; Abhijit Pawar; Sanjay N. Talbar

Addresses: Department of Electronics and Telecommunication Engineering, Don Bosco Institute of Technology, Mumbai-400070, Maharashtra, India ' Department of Radiodiagnosis, S.K.N. Medical College and General Hospital, Narhe, Pune-411041, Maharashtra, India ' Department of Electronics and Telecommunication Engineering, SGGS Institute of Engineering and Technology, Vishnupuri, Nanded-431606, Maharashtra, India

Abstract: This paper presents non-subsampled rotated wavelet transform based feature extraction approach to multimodality medical image fusion. The non-subsampled rotated wavelet filters are designed to extract textural and edge features from axial brain images from the modalities viz. computed tomography and magnetic resonance imaging. These extracted features are selected using entropy-based fusion rule to form composite spectral plane. Entropy-based fusion rule preserves dominant spectral features and imparts all relevant information from both the modalities to the fused image. The fused image is reconstructed using inverse transform from the composite spectral slice. The proposed algorithm is evaluated using 39 sets of pilot images of 23 patients subjectively and objectively. Three expert radiologists have verified the subjective quality of the fused images to ascertain abnormality. Subjective and objective evaluation reveal that the fused images using proposed algorithm are superior in terms of visualisation of abnormalities over the state of the art wavelet based algorithms.

Keywords: multimodality medical image fusion; MMIF; discrete wavelet transform; DWT; rotated wavelet filters; RWFs; non-subsampled rotated wavelet transform; NSRWT; cancer treatment; radiotherapy.

DOI: 10.1504/IJCSYSE.2018.091389

International Journal of Computational Systems Engineering, 2018 Vol.4 No.2/3, pp.96 - 105

Received: 30 Oct 2016
Accepted: 05 Apr 2017

Published online: 30 Apr 2018 *

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