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A novel endoscopy image fusion system: combine white light imaging and compound band imaging

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International Journal of Computer Assisted Radiology and Surgery Aims and scope Submit manuscript

Abstract

Purpose

White light imaging (WLI) is a commonly seen examination mode in endoscopy. The particular light in compound band imaging (CBI) can highlight delicate structures, such as capillaries and tiny structures on the mucosal surface. These two modes complement each other, and doctors switch between them manually to complete the examination. This paper proposes an endoscopy image fusion system to combine WLI and CBI.

Methods

We add a real-time rotatable color wheel in the light source device of the AQ-200 endoscopy system to achieve rapid imaging of two modes at the same position of living tissue. The two images corresponding to the pixel level can avoid registration and lay the foundation for image fusion. We propose a multi-scale image fusion framework, which involves Laplacian pyramid (LP) and convolutional sparse representation (CSR) and strengthens the details in the fusion rule.

Results

Volunteer experiments and ex vivo pig stomach trials are conducted to verify the feasibility of our proposed system. We also conduct comparative experiments with other image fusion methods, evaluate the quality of the fused images, and verify the effectiveness of our fusion framework. The results show that our fused image has rich details, high color contrast, apparent structures, and clear lesion boundaries.

Conclusion

An endoscopy image fusion system is proposed, which does not change the doctor's operation and makes the fusion of WLI and CBI optical staining technology a reality. We change the light source device of the endoscope, propose an image fusion framework, and verify the feasibility and effectiveness of our scheme. Our method fully integrates the advantages of WLI and CBI, which can help doctors make more accurate judgments than before. The endoscopy image fusion system is of great significance for improving the detection rate of early lesions and has broad application prospects.

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Acknowledgements

The authors acknowledge supports from National Key Research and Development Program of China (2022YFC2405200), National Natural Science Foundation of China (82027807, U22A2051), and Beijing Municipal Natural Science Foundation (7212202).

Author information

Authors and Affiliations

  1. Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, 100084, China

    Shipeng Zhang, Xinran Zhang & Hongen Liao

  2. Department of Biomedical Engineering, College of Future Technology, Peking University, Beijing, 100871, China

    Ye Fu & Tianyu Xie

  3. Beijing Tsinghua Changgung Hospital, Beijing, 102218, China

    Zhe Zhao

  4. School of Clinical Medicine, Tsinghua University, Beijing, 100084, China

    Zhe Zhao

Authors
  1. Shipeng Zhang
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  3. Xinran Zhang
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Correspondence to Zhe Zhao or Hongen Liao.

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Appendix

Appendix

See Figs. 11, 12, and Tables 6 and 7.

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Zhang, S., Fu, Y., Zhang, X. et al. A novel endoscopy image fusion system: combine white light imaging and compound band imaging. Int J CARS 19, 331–344 (2024). https://doi.org/10.1007/s11548-023-02988-x

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  • DOI: https://doi.org/10.1007/s11548-023-02988-x

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