Teste de reatividade vascular por termografia usando imagens infravermelhas

Abstract

The paper presents a research and the development of a method for the processing of the obtained images, use the term digital thermal allied to thermography. Digital Thermal Monitoring (DTM) is a technique for assessing the vascular reactivity of an individual through the thermal monitoring of fingerprints during an occlusion of the brachial artery. The acquisition of images of the index fingers of the hands is performed during compression of the brachial artery (brachial test), where the temperatures of the extremities of the fingers decrease and after decompression an extremity temperature tends to self-regulate. To identify as fingertips, apply a thresholding technique and aperture and tuning operations on the images. Complication of the mean temperature of the fingers indicating one right hand (vascular reactivity) and another for a left hand (neurovascular reactivity). Analyzing the curve pattern, after a decompression, is a finger temperature to a higher temperature in the stabilization phase indicates that the individual has a good vascular reactivity. Otherwise, the individual has a low vascular reactivity and, therefore, an increased risk of cardiovascular disease. This work aims to develop methods to help evaluate the potential of cardiovascular dysfunction in patients, using infrared images of the hands after compression and brachial pneumatic decompression.