J Med Syst - Morphological multiscale enhancement, fuzzy filter and watershed for vascular tree extraction in angiogram.

Tópicos

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Resumo

This paper presented an automatic morphological method to extract a vascular tree using an angiogram. Under the assumption that vessels are connected in a local linear pattern in a noisy environment, the algorithm decomposes the vessel extraction problem into several consecutive morphological operators, aiming to characterize and distinguish different patterns on the angiogram: background, approximate vessel region and the boundary. It started with a contrast enhancement and background suppression process implemented by subtracting the background from the original angiogram. The background was estimated using multiscale morphology opening operators by varying the size of structuring element on each pixel. Subsequently, the algorithm simplified the enhanced angiogram with a combined fuzzy morphological opening operation, with linear rotating structuring element, in order to fit the vessel pattern. This filtering process was then followed by simply setting a threshold to produce approximate vessel region. Finally, the vessel boundaries were detected using watershed techniques with the obtained approximate vessel centerline, thinned result of the obtained vessel region, as prior marker for vessel structure. Experimental results using clinical digitized vascular angiogram and some comparative performance of the proposed algorithm were reported.

Resumo Limpo

paper present automat morpholog method extract vascular tree use angiogram assumpt vessel connect local linear pattern noisi environ algorithm decompos vessel extract problem sever consecut morpholog oper aim character distinguish differ pattern angiogram background approxim vessel region boundari start contrast enhanc background suppress process implement subtract background origin angiogram background estim use multiscal morpholog open oper vari size structur element pixel subsequ algorithm simplifi enhanc angiogram combin fuzzi morpholog open oper linear rotat structur element order fit vessel pattern filter process follow simpli set threshold produc approxim vessel region final vessel boundari detect use watersh techniqu obtain approxim vessel centerlin thin result obtain vessel region prior marker vessel structur experiment result use clinic digit vascular angiogram compar perform propos algorithm report

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