Overview

CellFace aims to establish digital, holographic flow cytometry as a label-free platform technology for cellular diagnostics. We are an interdisciplinary project of TU Munich coordinated by the Chair for Biomedical Electronics and the Chair for Data Processing in cooperation with several departments of the University Hospital Klinikum rechts der Isar.



Motivation

Blood delivers a variety of insights into health conditions of an organism, especially in the field of in-vitro diagnostics. Therefore, hematological analysis such as complete blood count (CBC) represent a high share of laboratory tests in the health care sector. Despite the availability of largely automated analyzers, the gold standard for the routine diagnosis of hematological disorders is the tedious Giemsa stained blood smear [1] which suffers from inter-observer variations. Further drawbacks of current approaches are a high effort for sample preparation, material expenses, a long processing time or missing clinical relevance [2]. To overcome the mentioned issues and specially to reduce time-consuming manual intervention, the CellFace project was created. Flow cytometry in combination with digital holographic microscopy (DHM) [3] enables researchers to record 3D images of each single cell, while sustaining a high throughput stream of blood cells. The overall goal is to establish this label- and reagent-free approach as a platform technology for automated blood cell diagnosis [4]. The best methodologies to analyze the recorded phase images are subject to research. Therefore, this work will investigate classical and modern techniques in the field of computer vision and machine learning on their suitability for interpreting the images and the contained information.


Scientific and Technical Goals

We develop a novel in vitro diagnostic method for cell analysis and biomarkers which are not accessible today for clinical routine. With access to clinical samples, a highly accurate sample presentation and imaging solution, we can offer AI-induced data exploration and interpretations of volatile biomarker panels.

A tiny drop of blood gives us a detailed picture of patient health and lets us support clinicians in their decision-making. Our label-free technology enables us to provide insights in different health aspects varying from cardiovascular risk assessment to leukemia detection and all that within just a few minutes.


Contact


Email: cellface@ei.tum.de

Lab: see here Locations


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References

  1. J. J. Barcia, “The giemsa stain: Its history and applications,” International Journal of Surgical Pathology, vol. 15, no. 3, pp. 292–296, 2007.
  2. A. Filby, “Sample preparation for flow cytometry benefits from some lateral thinking,” Cytometry Part A: the journal of the International Society for Analytical Cytology, vol. 89, pp. 1054–1056, 2016.
  3. Y. Jo, H. Cho, S. Yun Lee, G. Choi, G. Kim, H.-s. Min, and Y. Park, “Quantitative phase imaging and artificial intelligence: A review,” IEEE Journal of Selected Topics in Quantum Electronics, vol. 25, pp. 1–14, 2018.
  4. Z. El-Schich, S. Kamlund, B. Janicke, K. Alm, and A. Wingren, “Holography: The usefulness of digital holographic microscopy for clinical diagnostics,” in Holographic Materials and Optical Systems, pp. 319– 333, Intech, 2017.
  5. S. Prieto, A. Powless, J. W. Boice, S. Sharma, and T. Muldoon, “Proflavine hemisulfate as a fluorescent contrast agent for point-of-care cytology,” PLoS ONE, vol. 10, p. e0125598, 2015.
  6. M. Ugele, M. Weniger, M. Stanzel, M. Bassler, S. W. Krause, O. Friedrich, O. Hayden, and L. Richter, “Labelfree high-throughput leukemia detection by holographic microscopy,” Advanced Science, vol. 1800761, 2018.
  7. M. Rinehart, H. Sang Park, and A. Wax, “Influence of defocus on quantitative analysis of microscopic objects and individual cells with digital holography,” Biomedical Optics Express, vol. 6, no. 6, pp. 2067–2075, 2015.
  8. Y. Li, B. Cornelis, A. Dusa, G. Vanmeerbeeck, D. Vercruysse, E. Sohn, K. Blaszkiewicz, D. Prodanov, P. Schelkens, and L. Lagae, “Accurate label-free 3-part leukocyte recognition with single cell lens-free imaging flow cytometry,” Computers in biology and medicine, vol. 96, pp. 147–156, 2018.
  9. D. Vercruysse, A. Dusa, R. Stahl, G. Vanmeerbeeck, K. de Wijs, C. Liu, D. Prodanov, P. Peumans, and L. Lagae, “Three-part differential of unlabeled leukocytes with a compact lens-free imaging flow cytometer,” Nature biotechnology, vol. 15, pp. 1123–1132, 2013.
  10. E.-A. D. Amir, K. L. Davis, M. Tadmor, E. Simonds, J. Levine, S. Bendall, D. Shenfeld, S. Krishnaswamy, G. Nolan, and D. Pe’er, “visne enables visualization of high dimensional single-cell data and reveals phenotypic heterogeneity of leukemia,” Lab on a Chip, vol. 31, no. 6, pp. 545–52, 2013.
  11. D. Roitshtain, L. Wolbromsky, E. Bal, H. Greenspan, L. L. Satterwhite, and N. T. Shaked, “Quantitative phase microscopy spatial signatures of cancer cells,” Cytometry Part A: the journal of the International Society for Analytical Cytology, vol. 91, pp. 482–493, 2017.
  12. J. Yoon, Y. Jo, M.-h. Kim, K. Kim, S. Lee, S.-J. Kang, and Y. Park, “Identification of non-activated lymphocytes using three-dimensional refractive index tomography and machine learning,” Scientific reports, vol. 7, no. 1, p. 6654, 2017.
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