A low-cost LED-based multispectral capillaroscopy system for oximetry of the nailfold

Michaela Taylor-Williams; Steven Mead; Travis W. Sawyer; Lina Hacker; Calum Williams; Michael Berks; Andrea Murray; Sarah E. Bohndiek

doi:10.1117/12.2575869

5 March 2021 A low-cost LED-based multispectral capillaroscopy system for oximetry of the nailfold

Michaela Taylor-Williams, Steven Mead, Travis W. Sawyer, Lina Hacker, Calum Williams, Michael Berks, Andrea Murray, Sarah E. Bohndiek

Author Affiliations +

Proceedings Volume 11651, Optical Diagnostics and Sensing XXI: Toward Point-of-Care Diagnostics; 116510J (2021) https://doi.org/10.1117/12.2575869
Event: SPIE BiOS, 2021, Online Only

Abstract

Nailfold capillaroscopy is a technique for imaging the capillary bed in the finger nailfold, that is used in the diagnosis of scleroderma. Knowledge of the capillary oxygenation profile would be a substantial advantage in disease evaluation. A compact, low-cost LED-illuminated capillaroscopy system was conceived based on inexpensive parts and optical hardware. The system uses a compact Raspberry Pi to control a custom-designed LED ring light, with white-light LEDs interleaved with three narrowband LEDs, and a Raspberry Pi camera. Capillary visualisation and distinction of haemoglobin contrast is demonstrated, suggesting future promise for application of multispectral nailfold capillaroscopy in low-resource settings.

Conference Presentation

Citation Download Citation

Michaela Taylor-Williams, Steven Mead, Travis W. Sawyer, Lina Hacker, Calum Williams, Michael Berks, Andrea Murray, and Sarah E. Bohndiek "A low-cost LED-based multispectral capillaroscopy system for oximetry of the nailfold", Proc. SPIE 11651, Optical Diagnostics and Sensing XXI: Toward Point-of-Care Diagnostics, 116510J (5 March 2021); https://doi.org/10.1117/12.2575869

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available