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Journal of Biomedical Optics • Open Access

Fourier ptychographic microscopy for filtration-based circulating tumor cell enumeration and analysis
Author(s): Anthony J. Williams; Jaebum Chung; Xiaoze Ou; Guoan Zheng; Siddarth Rawal; Zheng Ao; Ram Datar; Changhuei Yang; Richard J. Cote

Paper Abstract

Circulating tumor cells (CTCs) are recognized as a candidate biomarker with strong prognostic and predictive potential in metastatic disease. Filtration-based enrichment technologies have been used for CTC characterization, and our group has previously developed a membrane microfilter device that demonstrates efficacy in model systems and clinical blood samples. However, uneven filtration surfaces make the use of standard microscopic techniques a difficult task, limiting the performance of automated imaging using commercially available technologies. Here, we report the use of Fourier ptychographic microscopy (FPM) to tackle this challenge. Employing this method, we were able to obtain high-resolution color images, including amplitude and phase, of the microfilter samples over large areas. FPM’s ability to perform digital refocusing on complex images is particularly useful in this setting as, in contrast to other imaging platforms, we can focus samples on multiple focal planes within the same frame despite surface unevenness. In model systems, FPM demonstrates high image quality, efficiency, and consistency in detection of tumor cells when comparing corresponding microfilter samples to standard microscopy with high correlation (R2=0.99932). Based on these results, we believe that FPM will have important implications for improved, high throughput, filtration-based CTC analysis, and, more generally, image analysis of uneven surfaces.

Paper Details

Date Published: 20 June 2014
PDF: 8 pages
J. Biomed. Opt. 19(6) 066007 doi: 10.1117/1.JBO.19.6.066007
Published in: Journal of Biomedical Optics Volume 19, Issue 6
Show Author Affiliations
Anthony J. Williams, Univ. of Miami Miller School of Medicine (United States)
Jaebum Chung, California Institute of Technology (United States)
Xiaoze Ou, California Institute of Technology (United States)
Guoan Zheng, California Institute of Technology (United States)
Siddarth Rawal, Univ. of Miami Miller School of Medicine (United States)
Zheng Ao, Univ. of Miami Miller School of Medicine (United States)
Ram Datar, Univ. of Miami Miller School of Medicine (United States)
Changhuei Yang, California Institute of Technology (United States)
Richard J. Cote, Univ. of Miami Miller School of Medicine (United States)


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