Improved imaging of immunomagnetically enriched rare cells

G - Physics – 01 – N

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G01N 33/574 (2006.01) B03C 1/033 (2006.01) G01N 15/00 (2006.01)

Patent

CA 2724978

A method for removing excess unbound ferrofluid and imaging immunomagnetically enriched circulating tumor cells is provided. A vessels having a preformed grooves in the viewing surface is optimally designed for cell alignment and imag-ing. After separating the unbound particles by centrifugation, an externally-applied force is applied to transport magnetically re-sponsive particle-CTC complex toward the transparent collection wall. The grooved inner surface of the viewing face of the cham-ber provide uniform distribution of the particles for easy imaging. The invention is also useful in conducting quantitative analysis and sample preparation in conjunction with automated cell enumeration techniques as in quantitative analysis of CTC in disease.

L'invention porte sur un procédé pour éliminer un ferrofluide non lié en excès et pour effectuer une imagerie de cellules tumorales circulantes immuno-magnétiquement enrichies. Un récipient ayant des rainures préformées dans la surface de visualisation est mis au point de façon optimale pour un alignement de cellules et une imagerie. Après séparation des particules non liées par centrifugation, une force appliquée de façon externe est appliquée au complexe particules-CTC magnétiquement sensible au transport vers la paroi de collecte transparente. La surface interne rainurée de la face de visualisation de la chambre assure une distribution uniforme des particules pour une imagerie aisée. L'invention est également utile pour conduire une analyse quantitative et une préparation d'échantillon conjointement avec des techniques automatisées d'énumération cellulaire comme dans l'analyse quantitative des CTC dans une maladie.

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