The importance of illumination in a non-contact photoplethysmography imaging system for burn wound assessment

Weirong Mo; Rachit Mohan; Weizhi Li; Xu Zhang; Eric W. Sellke; Wensheng Fan; J. Michael DiMaio; Jeffery E. Thatcher

doi:10.1117/12.2080699

26 February 2015 The importance of illumination in a non-contact photoplethysmography imaging system for burn wound assessment

Weirong Mo, Rachit Mohan, Weizhi Li, Xu Zhang, Eric W. Sellke, Wensheng Fan, J. Michael DiMaio, Jeffery E. Thatcher

Author Affiliations +

Proceedings Volume 9303, Photonic Therapeutics and Diagnostics XI; 93030M (2015) https://doi.org/10.1117/12.2080699
Event: SPIE BiOS, 2015, San Francisco, California, United States

Abstract

We present a non-contact, reflective photoplethysmogram (PPG) imaging method and a prototype system for identifying the presence of dermal burn wounds during a burn debridement surgery. This system aims to provide assistance to clinicians and surgeons in the process of dermal wound management and wound triage decisions. We examined the system variables of illumination uniformity and intensity and present our findings. An LED array, a tungsten light source, and eventually high-power LED emitters were studied as illumination methods for our PPG imaging device. These three different illumination sources were tested in a controlled tissue phantom model and an animal burn model. We found that the low heat and even illumination pattern using high power LED emitters provided a substantial improvement to the collected PPG signal in our animal burn model. These improvements allow the PPG signal from different pixels to be comparable in both time-domain and frequency-domain, simplify the illumination subsystem complexity, and remove the necessity of using high dynamic range cameras. Through the burn model output comparison, such as the blood volume in animal burn data and controlled tissue phantom model, our optical improvements have led to more clinically applicable images to aid in burn assessment.

Citation Download Citation

Weirong Mo, Rachit Mohan, Weizhi Li, Xu Zhang, Eric W. Sellke, Wensheng Fan, J. Michael DiMaio, and Jeffery E. Thatcher "The importance of illumination in a non-contact photoplethysmography imaging system for burn wound assessment", Proc. SPIE 9303, Photonic Therapeutics and Diagnostics XI, 93030M (26 February 2015); https://doi.org/10.1117/12.2080699

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