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Published byHerbert Daniel Modified over 9 years ago
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Automated Gating of Flow Cytometry Data using Rho Path Distance http://www.genengnews.com/insight-and-intelligenceand153/flow-cytometry-goes-atomic/77899583/ Keyi Wu Project Leader: Matthew Hirn
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Flow Cytometry Laser based Used in: cell counting cell sorting biomarker detection indicates normal biological & pathogenic processes protein engineering Physical & chemical properties of cells Diagnosis of health disorders http://www.scq.ubc.ca/flow-cytometry-a-technology-to-count-and-sort-cells/
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Gating Sequentially separate regions based on fluorescence intensity Specific protocol exists for diagnostic and clinical purposes
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Path Distance
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rho -> 0 : shortest path measured purely based on adding local distance rho -> Inf : distance defined by “worst” segment in path
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Compute in Parallel Divide data (size N) into sections each with less than a desired amount of points (n) Define boundary points for all boxes Calculate local and global distance within each box & for boundary points Find path between points not in same box through boundary paths
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Principal Component Analysis (PCA) Linear dimensionality reduction technique Finds dimension in which variance is maximal
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Partitioning Data BoxesPCA
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Ratio of distance computed from parallel vs. regular
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Future work Increase efficiency of code FlowCAP - Flow Cytometry: Critical Assessment of Population Identification Methods
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