J Med Syst - An automatic fuzzy-based multi-temporal brain digital subtraction angiography image fusion algorithm using curvelet transform and content selection strategy.

Tópicos

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Resumo

Recently image fusion has prominent role in medical image processing and is useful to diagnose and treat many diseases. Digital subtraction angiography is one of the most applicable imaging to diagnose brain vascular diseases and radiosurgery of brain. This paper proposes an automatic fuzzy-based multi-temporal fusion algorithm for 2-D digital subtraction angiography images. In this algorithm, for blood vessel map extraction, the valuable frames of brain angiography video are automatically determined to form the digital subtraction angiography images based on a novel definition of vessel dispersion generated by injected contrast material. Our proposed fusion scheme contains different fusion methods for high and low frequency contents based on the coefficient characteristic of wrapping second generation of curvelet transform and a novel content selection strategy. Our proposed content selection strategy is defined based on sample correlation of the curvelet transform coefficients. In our proposed fuzzy-based fusion scheme, the selection of curvelet coefficients are optimized by applying weighted averaging and maximum selection rules for the high frequency coefficients. For low frequency coefficients, the maximum selection rule based on local energy criterion is applied to better visual perception. Our proposed fusion algorithm is evaluated on a perfect brain angiography image dataset consisting of one hundred 2-D internal carotid rotational angiography videos. The obtained results demonstrate the effectiveness and efficiency of our proposed fusion algorithm in comparison with common and basic fusion algorithms.

Resumo Limpo

recent imag fusion promin role medic imag process use diagnos treat mani diseas digit subtract angiographi one applic imag diagnos brain vascular diseas radiosurgeri brain paper propos automat fuzzybas multitempor fusion algorithm d digit subtract angiographi imag algorithm blood vessel map extract valuabl frame brain angiographi video automat determin form digit subtract angiographi imag base novel definit vessel dispers generat inject contrast materi propos fusion scheme contain differ fusion method high low frequenc content base coeffici characterist wrap second generat curvelet transform novel content select strategi propos content select strategi defin base sampl correl curvelet transform coeffici propos fuzzybas fusion scheme select curvelet coeffici optim appli weight averag maximum select rule high frequenc coeffici low frequenc coeffici maximum select rule base local energi criterion appli better visual percept propos fusion algorithm evalu perfect brain angiographi imag dataset consist one hundr d intern carotid rotat angiographi video obtain result demonstr effect effici propos fusion algorithm comparison common basic fusion algorithm

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