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Proceedings Paper

A portable device using a single-board computer for white light and fluorescence widefield images
Author(s): Patrick Oliveira Feitosa; Marlon Rodrigues Garcia; Daniel José Chianfrone; Anderson Luiz Zanchin; Sebastião Pratavieira
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Paper Abstract

In a world with a growing need for rapid medical diagnosis, point-of-care devices based on optics have become an interesting solution. Moreover, the low cost, simplicity, and ease of use also become essential to be applied in a clinical environment. Nowadays, smartphones are an attractive, user-friendly option, but the rapid changes in the models, the variety of brands, and the risk of contamination of personal smartphones in a clinical situation make this choose not the best one. Single-board computers as Raspberry Pi can be an alternative for a low-cost imaging device that allows image acquisition, visualization, and processing. This study describes a portable system capable of acquiring and processing white light and fluorescence images, suitable for clinical purposes. The system consists of a single-board computer (Raspberry Pi 3B+, Raspberry Pi Foundation, UK) coupled to a digital camera and a touchscreen display. The portable device comprises six violet LEDs (emitting at 407 nm) to excite the tissue and a long-pass optical filter to acquire the fluorescence images; four white LEDs to obtain the white light one, besides a digital camera to perform the acquisition itself. The images are saved in the singleboard computer, where an algorithm written in Python (Python Foundation) calibrates the camera, acquires, and processes the acquired images, interacting with the user through touch with a GUI. Being a portable, easy to use, low-cost system, this device is convenient to be used in a clinical environment and allows a fast diagnosis and the possibility to be reproduced for widespread point-of-care use.

Paper Details

Date Published: 21 February 2020
PDF: 7 pages
Proc. SPIE 11230, Optics and Biophotonics in Low-Resource Settings VI, 112300Y (21 February 2020); doi: 10.1117/12.2541457
Show Author Affiliations
Patrick Oliveira Feitosa, Instituto de Física de São Carlos (Brazil)
Marlon Rodrigues Garcia, Instituto de Física de São Carlos (Brazil)
Daniel José Chianfrone, Instituto de Física de São Carlos (Brazil)
Anderson Luiz Zanchin, Instituto de Física de São Carlos (Brazil)
Sebastião Pratavieira, Instituto de Física de São Carlos (Brazil)

Published in SPIE Proceedings Vol. 11230:
Optics and Biophotonics in Low-Resource Settings VI
David Levitz; Aydogan Ozcan, Editor(s)

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