Design and implementation of a protocol for acquisition and processing of infrared images obtained from hands

Abstract

Disorders associated with repeated trauma account for about 60% of all occupational illnesses, being Carpal Tunnel Syndrome (CTS), the most consulted today. Infrared Thermography (IT) has come to play an important role in the field of medicine, where diseases are detected by temperature variations. In this paper we present the extraction of temperature variations in space and time from hands of healthy and ill subjects with CTS. These features are expected to give support to the analysis of CTS using IT. The paper presents a theoretical framework of CTS, a protocol to acquire infrared images and create a standardized collection. The techniques used for image registration and feature extraction are included. Finally, the results obtained with representative features in images of healthy subjects are presented and compared against features extracted from patientss with CTS.

Quantitative Models for Prediction of Cumulative Trauma Disorders Applied to the Maquiladora Industry

“…Prior to taking the thermograms and in order to eliminate uncertainties in temperature measurements, the following restrictions were imposed on participants, based on the protocols of Glamorgan [ 44 ], Standard Procedures for Infrared Imaging in Medicine [ 45 ], and Design and Application of a Protocol for Acquiring and Processing Infrared Images from the Hands [ 46 ].…”

“…Before each shot, the camera was kept turned on for 15 minutes to maintain thermal equilibrium with its surroundings. The camera was placed perpendicular to the subject’s hand at a minimum distance of 0.601 m [ 46 ]. For this study, a distance of two meters was considered.…”

El ensayo no destructivo usando termografía infrarroja en el mundo y en América Latina: Una revisión

“…En el área biomédica algunas aplicaciones derivan sus resultados del análisis de imágenes térmicas; por ejemplo, en la identificación biométrica utilizando imágenes IR de la red vascular de la cara dorsal de la mano [70]. El uso de IRT representa una herramienta valiosa para detectar síndrome de Túnel Carpiano [71], al aplicar técnicas para registro y extracción de características de las imágenes térmicas que permite realizar una comparación entre sujetos sanos y aquellos que presentan el síndrome. De manera similar en [72] se presenta la aplicación del método TSR para observar el comportamiento térmico en regiones vasculares de un ser humano, encontrando diversas evidencias sobre los patrones de calentamiento entre venas y válvulas venosas, permitiendo así su identificación y funcionalidad.…”

Termografia aplicada ao Fenômeno de Raynaud: Artigo de Revisão Bibliométrica

“…Contudo, as inúmeras diferenças metodológicas entre os estudos, causa insegurança na adoção de qualquer um deles. 20 Assim, o objetivo deste estudo foi identificar os diversos protocolos para: a) verificar os que tiveram resultados positivos na detecção do F.R. e b) identificar os pontos em comum entre eles.…”

“…12 Os Protocolos para aquisição de imagens infravermelhas envolvem: a preparação da área para a tomada de imagens, a adequação do local, distância entre a região e a câmera, escala térmica e posição do sujeito na aquisição de imagem. 20 O cold stress (estresse ao frio) está presente na metodologia da aplicação da termografia no estudo do F.R. na maior parte dos artigos (80,92%).…”