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Automated Gating of Flow Cytometry Data using Rho Path Distance

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Presentation on theme: "Automated Gating of Flow Cytometry Data using Rho Path Distance"— Presentation transcript:

1 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

2 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/

3 Gating Sequentially separate regions based on fluorescence intensity Specific protocol exists for diagnostic and clinical purposes

4 Path Distance

5 rho -> 0 : shortest path measured purely based on adding local distance rho -> Inf : distance defined by “worst” segment in path

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7 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

8 Principal Component Analysis (PCA) Linear dimensionality reduction technique Finds dimension in which variance is maximal

9 Partitioning Data BoxesPCA

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11 Ratio of distance computed from parallel vs. regular

12 Future work Increase efficiency of code FlowCAP - Flow Cytometry: Critical Assessment of Population Identification Methods


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