An optical coherence tomography imaging apparatus for enhancing a contrast in one or more volumetric optical coherence tomography images by filtering of data, comprising: at least one first arrangement comprising a light source and configured to provide a particular radiation which is split into at least one first electro-magnetic radiation directed to at least one sample and into at least one second electro-magnetic radiation directed to a reference; at least one second arrangement configured to apply the at least one first electro-magnetic radiation having a particular cross-sectional width to at least one portion of the at least one sample to generate at least one third electro-magnetic radiation, wherein the at least one second arrangement is further configured to translate the at least one first electro-magnetic radiation in the at least one portion along a particular axis X for a distance between a multiplier of 0.5 and 100 of the particular cross-sectional width; wherein the at least one second arrangement is configured to translate the at least one first electro-magnetic radiation in the at least one portion along a further axis Y which is different from the particular axis X at least one third arrangement configured to detect an interference between the at least one third electro-magnetic radiation associated with the at least one first electro-magnetic radiation and at least one fourth electro-magnetic radiation associated with the at least one second electro-magnetic radiation, at least one fourth arrangement configured to convert the detected interference to A-lines in the Z dimension, to obtain 3-dimensional OCT data and to generate at least one image associated with the at least one portion as a function of the detected interference by using said 3-dimensional OCT data, wherein said fourth arrangement comprises a volumetric median filter, said filter being configured to filter the 3-dimensional OCT data in-plane corresponding to the section plane in dimensions XZ and to filter the 3-dimensional OCT data out-of-plane corresponding to the Y dimension, and wherein the volumetric filter is asymmetric in size with minimal filtering in plane and substantial filtering out of plane. at least one first arrangement comprising a light source and configured to provide a particular radiation which is split into at least one first electro-magnetic radiation directed to at least one sample and into at least one second electro-magnetic radiation directed to a reference; at least one second arrangement configured to apply the at least one first electro-magnetic radiation having a particular cross-sectional width to at least one portion of the at least one sample to generate at least one third electro-magnetic radiation, wherein the at least one second arrangement is further configured to translate the at least one first electro-magnetic radiation in the at least one portion along a particular axis X for a distance between a multiplier of 0.5 and 100 of the particular cross-sectional width; wherein the at least one second arrangement is configured to translate the at least one first electro-magnetic radiation in the at least one portion along a further axis Y which is different from the particular axis X at least one third arrangement configured to detect an interference between the at least one third electro-magnetic radiation associated with the at least one first electro-magnetic radiation and at least one fourth electro-magnetic radiation associated with the at least one second electro-magnetic radiation, at least one fourth arrangement configured to convert the detected interference to A-lines in the Z dimension, to obtain 3-dimensional OCT data and to generate at least one image associated with the at least one portion as a function of the detected interference by using said 3-dimensional OCT data, wherein said fourth arrangement comprises a volumetric median filter, said filter being configured to filter the 3-dimensional OCT data in-plane corresponding to the section plane in dimensions XZ and to filter the 3-dimensional OCT data out-of-plane corresponding to the Y dimension, and wherein the volumetric filter is asymmetric in size with minimal filtering in plane and substantial filtering out of plane.