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Updated: Jun 18, 2026
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Lensless On-chip Imaging of Cells Provides a New Tool for High-throughput Cell-Biology and Medical Diagnostics
Published on: December 14, 2009
Lensless imaging for point-of-care testing
SangJun Moon1, Hasan Onur Keles, Yun-Gon Kim
1Bio-Acoustic-MEMS in Medicine Laboratory, Center for Bioengineering, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
Summary
A new microfluidic chip with lensless imaging rapidly counts CD4(+) T-lymphocytes. This low-cost platform offers a potential solution for point-of-care testing in resource-limited settings.
Area of Science:
- Biomedical Engineering
- Immunology
- Optical Imaging
Background:
- Accurate CD4(+) T-lymphocyte counts are crucial for managing HIV/AIDS.
- Existing methods for CD4(+) T-lymphocyte enumeration can be complex and require specialized infrastructure, limiting their use in resource-limited settings.
Purpose of the Study:
- To develop and validate an integrated microfluidic chip and lensless imaging platform for rapid CD4(+) T-lymphocyte counting.
- To assess the performance of the platform in terms of capture efficiency, specificity, and overall accuracy.
Main Methods:
- Immobilization of anti-CD4 antibodies on a microfluidic chip to capture CD4(+) T-lymphocytes.
- Utilization of lensless shadow imaging with a charge-coupled device (CCD) sensor for cell detection.
- Automated image analysis for rapid cell enumeration.
Main Results:
- The platform demonstrated a CD4(+) T-lymphocyte capture efficiency of 70.2 +/- 6.5% and a specificity of 88.8 +/- 5.4%.
- The CCD sensor achieved 96 +/- 1.6% efficiency, with an overall platform performance of 83.5 +/- 2.4% (n = 9 devices).
- Cell counting was achieved within three seconds using automated software.
Conclusions:
- The integrated microfluidic and lensless imaging platform provides a rapid and efficient method for CD4(+) T-lymphocyte counting.
- This technology holds significant potential for point-of-care testing (POCT) applications, particularly in resource-limited environments.
- The platform's ability to process unprocessed whole blood simplifies sample handling and accelerates diagnostic capabilities.
