| Texto completo | |
| Autor(es): |
de Lima, Vanessa F.
;
Bachour, Raquel P. de Souza
;
Cardoso, George C.
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | NOVEL OPTICAL SYSTEMS, METHODS, AND APPLICATIONS XXVII; v. 13130, p. 4-pg., 2024-01-01. |
| Resumo | |
Capillary refill time (CRT) is a traditional, semi-quantitative method used to estimate blood flow return to the skin after compression, with times over a few seconds deemed abnormal. Quantitative CRT (qCRT) aims to enhance traditional CRT by offering precise, mobile measurements crucial for telehealth. This study addresses important qCRT challenges, such as variation in skin phototype and the creation of a consistent, phototype-independent algorithm to reduce variability. We employed cross-polarized imaging and cocircular setups to reduce specular reflection, analyzing CRT decay across various color spaces in thirty-two volunteers of all Fitzpatrick phototypes. The sensing system was an RGB camera. We have showed that it is possible to produce qCRT results that are insensitive to phototype (melanin). However, the qCRT results, even for the same operational mechanics, show high sensitivity to the specific algorithm used for CRT determination. Since different algorithms exist to determine CRT, we discuss specific examples using two methods to analyze the CRT decay curve and three color spaces (green channel, grayscale, and hemoglobin obtained by image processing). (AU) | |
| Processo FAPESP: | 18/16939-8 - Desenvolvimento e implementação de novas técnicas acústicas, magnéticas e ópticas para aplicações diagnósticas e terapêuticas |
| Beneficiário: | Antonio Adilton Oliveira Carneiro |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 22/16344-0 - Desenvolvimento de modelos para determinação robusta de tempo de enchimento capilar por video |
| Beneficiário: | Vanessa Ferreira de Lima |
| Modalidade de apoio: | Bolsas no Brasil - Iniciação Científica |