Supervised machine learning in microfluidic impedance flow cytometry for improved particle size determination

Douwe S. de Bruijn*, Henricus R.A. ten Eikelder, Vasileios A. Papadimitriou, Wouter Olthuis, Albert van den Berg

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)
38 Downloads (Pure)

Abstract

The assessment of particle and cell size in electrical microfluidic flow cytometers has become common practice. Nevertheless, in flow cytometers with coplanar electrodes accurate determination of particle size is difficult, owing to the inhomogeneous electric field. Pre-defined signal templates and compensation methods have been introduced to correct for this positional dependence, but are cumbersome when dealing with irregular signal shapes. We introduce a simple and accurate post-processing method without the use of pre-defined signal templates and compensation functions using supervised machine learning. We implemented a multiple linear regression model and show an average reduction of the particle diameter variation by 37% with respect to an earlier processing method based on a feature extraction algorithm and compensation function. Furthermore, we demonstrate its application in flow cytometry by determining the size distribution of a population of small (4.6 ± 0.9 μm) and large (5.9 ± 0.8 μm) yeast cells. The improved performance of this coplanar, two electrode chip enables precise cell size determination in easy to fabricate impedance flow cytometers.

Original languageEnglish
Pages (from-to)221-226
JournalCytometry Part A
Volume103
Issue number3
DOIs
Publication statusPublished - 2022

Keywords

  • impedance flow cytometry
  • machine learning
  • multiple linear regression
  • neural network
  • particle size

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