METHOD FOR OBTAINING STRUCTURAL IMAGES IN ENDOSCOPIC OPTICAL COHERENT TOMOGRAPHY Russian patent published in 2019 - IPC A61B6/00 A61B1/00 G02B27/48 

FIELD: medicine.

SUBSTANCE: invention relates to medical technology, in particular to the means of enhancing or restoring images in endoscopic coherent optical tomography. Method of obtaining structural images in endoscopic optical coherent tomography involves obtaining a group of A-scans that characterize the structure of a biological object under study or its part in a predetermined direction, preliminary noise reduction for a group of A-scans, conversion of a group of A-scans to one or a group of B-scans, the noise for the group of A-scans is preliminarily reduced by means of a threshold limitation with a given threshold of the intensity of the interference signal and band-pass filtering with given upper and lower cut-off frequencies of the band-pass filter, after converting a group of A-scans to one or a group of B-scans, one or a group of B-scans are filtered by means of convolution with a given convolution kernel, then, morphological processing of one or a group of B-scans obtained after filtration is performed by successively performing morphological erosion and morphological expansion for them, while the number of iterations for the operation of morphological erosion and masks for each iteration of this operation is selected so as to ensure that during the operation of morphological erosion, the values of all or part of the pixels corresponding to the speckle noise are zero, and the number of iterations and masks for each iteration of the morphological expansion operation are selected so as to ensure that all or part of the pixels that were zeroed during the morphological erosion operation are filled, then, smoothing the morphological processing of one or a group of B-scans with a median filter with a given rank is performed and one or a group of B-scans smoothed with a median filter is visualized by means of a user interface.

EFFECT: use of the invention allows to improve the quality of structural images in endoscopic optical coherent tomography by reducing the level of speckle noise, taking into account their morphological features.

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