Comput Methods Programs Biomed - Improving reliability of live/dead cell counting through automated image mosaicing.

Tópicos

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Resumo

Cell counting is one of the basic needs of most biological experiments. Numerous methods and systems have been studied to improve the reliability of counting. However, at present, manual cell counting performed with a hemocytometer still represents the gold standard, despite several problems limiting reproducibility and repeatability of the counts and, at the end, jeopardizing their reliability in general. We present our own approach based on image processing techniques to improve counting reliability. It works in two stages: first building a high-resolution image of the hemocytometer's grid, then counting the live and dead cells by tagging the image with flags of different colours. In particular, we introduce GridMos (http://sourceforge.net/p/gridmos), a fully-automated mosaicing method to obtain a mosaic representing the whole hemocytometer's grid. In addition to offering more significant statistics, the mosaic "freezes" the culture status, thus permitting analysis by more than one operator. Finally, the mosaic achieved can thus be tagged by using an image editor, thus markedly improving counting reliability. The experiments performed confirm the improvements brought about by the proposed counting approach in terms of both reproducibility and repeatability, also suggesting the use of a mosaic of an entire hemocytometer's grid, then labelled trough an image editor, as the best likely candidate for the new gold standard method in cell counting.

Resumo Limpo

cell count one basic need biolog experi numer method system studi improv reliabl count howev present manual cell count perform hemocytomet still repres gold standard despit sever problem limit reproduc repeat count end jeopard reliabl general present approach base imag process techniqu improv count reliabl work two stage first build highresolut imag hemocytomet grid count live dead cell tag imag flag differ colour particular introduc gridmo httpsourceforgenetpgridmo fullyautom mosaic method obtain mosaic repres whole hemocytomet grid addit offer signific statist mosaic freez cultur status thus permit analysi one oper final mosaic achiev can thus tag use imag editor thus mark improv count reliabl experi perform confirm improv brought propos count approach term reproduc repeat also suggest use mosaic entir hemocytomet grid label trough imag editor best like candid new gold standard method cell count

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