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An automatic fuzzy-based multi-temporal brain digital subtraction angiography image fusion algorithm using curvelet

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  • 1Department of Electrical Engineering, Najafabad Branch, Islamic Azad University, 517, Najafabad, Isfahan, Iran.

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This study introduces an automatic fuzzy-based fusion algorithm for digital subtraction angiography images to improve brain vascular disease diagnosis. The novel method enhances image clarity by optimizing vessel map extraction and fusion techniques.

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Area of Science:

  • Medical Image Processing
  • Biomedical Engineering
  • Radiology

Background:

  • Image fusion is crucial for diagnosing and treating diseases.
  • Digital subtraction angiography (DSA) is vital for brain vascular imaging and radiosurgery.
  • Existing DSA fusion methods require improvement for enhanced diagnostic accuracy.

Purpose of the Study:

  • To propose an automatic fuzzy-based multi-temporal fusion algorithm for 2-D DSA images.
  • To enhance the diagnosis of brain vascular diseases and aid in radiosurgery planning.
  • To improve the clarity and diagnostic value of DSA images through advanced fusion techniques.

Main Methods:

  • Automatic selection of valuable frames for DSA image formation based on vessel dispersion.
  • A novel content selection strategy using sample correlation of curvelet transform coefficients.
  • Fuzzy-based fusion incorporating weighted averaging and maximum selection rules for high-frequency coefficients and local energy criterion for low-frequency coefficients.

Main Results:

  • The proposed algorithm effectively extracts blood vessel maps and fuses multi-temporal DSA images.
  • Demonstrated superior performance compared to common and basic fusion algorithms in evaluations.
  • Achieved enhanced visual perception and diagnostic information from fused images.

Conclusions:

  • The developed automatic fuzzy-based fusion algorithm is effective and efficient for 2D DSA.
  • This method offers significant improvements for diagnosing brain vascular diseases using DSA.
  • The algorithm shows promise for advancing medical image processing in neuroradiology.