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Annals of Biomedical Engineering

, Volume 42, Issue 1, pp 231–240 | Cite as

Optical Systems for Point-of-care Diagnostic Instrumentation: Analysis of Imaging Performance and Cost

  • Mark C. Pierce
  • Shannon E. Weigum
  • Jacob M. Jaslove
  • Rebecca Richards-Kortum
  • Tomasz S. TkaczykEmail author
Article

Abstract

One of the key elements in point-of-care (POC) diagnostic test instrumentation is the optical system required for signal detection and/or imaging. Many tests which use fluorescence, absorbance, or colorimetric optical signals are under development for management of infectious diseases in resource limited settings, where the overall size and cost of the device is of critical importance. At present, high-performance lenses are expensive to fabricate and difficult to obtain commercially, presenting barriers for developers of in vitro POC tests or microscopic image-based diagnostics. We recently described a compact “hybrid” objective lens incorporating both glass and plastic optical elements, with a numerical aperture of 1.0 and field-of-view of 250 μm. This design concept may potentially enable mass-production of high-performance, low-cost optical systems which can be easily incorporated in the readout path of existing and emerging POC diagnostic assays. In this paper, we evaluate the biological imaging performance of these lens systems in three broad POC diagnostic application areas; (1) bright field microscopy of histopathology slides, (2) cytologic examination of blood smears, and (3) immunofluorescence imaging. We also break down the fabrication costs and draw comparisons with other miniature optical systems. The hybrid lenses provided images with quality comparable to conventional microscopy, enabling examination of neoplastic pathology and infectious parasites including malaria and cryptosporidium. We describe how these components can be produced at below $10 per unit in full-scale production quantities, making these systems well suited for use within POC diagnostic instrumentation.

Keywords

POC optics Miniature optics Cost assessment Diagnostic imaging performance 

Notes

Acknowledgments

We thank Dr. Nadarajah Vigneswaran at The University of Texas Health Science Center, Dental Branch, Houston, for his help and expertise in reviewing the oral pathology slides. We also thank Dr. Robert Kester at Rice University for his initial editing input of the paper material. This research was supported by the National Cancer Institute (NCI) under Grants R01 CA124319 and R01 CA103830.

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Copyright information

© Biomedical Engineering Society 2013

Authors and Affiliations

  • Mark C. Pierce
    • 1
  • Shannon E. Weigum
    • 2
  • Jacob M. Jaslove
    • 1
  • Rebecca Richards-Kortum
    • 2
    • 3
  • Tomasz S. Tkaczyk
    • 2
    • 4
    Email author
  1. 1.Department of Biomedical EngineeringRutgers, The State University of New JerseyPiscatawayUSA
  2. 2.Department of BioengineeringRice UniversityHoustonUSA
  3. 3.Rice 360° - Institute for Global Health TechnologiesRice UniversityHoustonUSA
  4. 4.Department of Electrical and Computer EngineeringRice UniversityHoustonUSA

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