Departamento de Educação Física, Universidade Federal de Viçosa, Viçosa 36570-900, Brazil.
Departamento de Educação Física, Universidade Federal de Juiz de Fora, Governador Valadares 35010-180, Brazil.
Int J Environ Res Public Health. 2023 Mar 1;20(5):4405. doi: 10.3390/ijerph20054405.
Infrared thermography (IRT) is a technology easy to use for clinical purposes as a pre-diagnostic tool for many health conditions. However, the analysis process of a thermographic image needs to be meticulous to make an appropriate decision. The adipose tissue is considered a potential influence factor in the skin temperature (Tsk) values obtained by IRT. This study aimed to verify the influence of body fat percentage (%BF) on Tsk measured by IRT in male adolescents. A total of 100 adolescents (16.79 ± 0.97 years old and body mass index of 18.41 ± 2.32 kg/m²) was divided into two groups through the results of a dual-energy X-ray absorptiometry analysis: obese ( = 50, %BF 30.21 ± 3.79) and non-obese ( = 50, %BF 11.33 ± 3.08). Thermograms were obtained by a FLIR T420 infrared camera and analyzed by ThermoHuman software version 2.12, subdividing the body into seven regions of interest (ROI). The results showed that obese adolescents presented lower mean Tsk values than the non-obese for all ROIs ( < 0.05), with emphasis on the global Tsk (0.91 °C) and anterior (1.28 °C) and posterior trunk (1.18 °C), with "very large" effect size values. A negative correlation was observed in all the ROI ( < 0.01), mainly in the anterior (r = -0.71, < 0.001) and posterior trunk (r = -0.65, < 0.001). Tables of thermal normality were proposed for different ROIs according to the classification of obesity. In conclusion, the %BF affects the registered Tsk values in male Brazilian adolescents assessed by IRT.
红外热成像（IRT）是一种易于在临床中使用的技术，可作为许多健康状况的预诊断工具。然而，热像图的分析过程需要细致入微，才能做出适当的决策。脂肪组织被认为是 IRT 获得的皮肤温度（Tsk）值的潜在影响因素。本研究旨在验证体脂百分比（%BF）对男性青少年 IRT 测量的 Tsk 的影响。通过双能 X 射线吸收法分析的结果，将 100 名青少年（16.79 ± 0.97 岁，体重指数为 18.41 ± 2.32 kg/m²）分为两组：肥胖组（n=50，%BF 30.21 ± 3.79）和非肥胖组（n=50，%BF 11.33 ± 3.08）。使用 FLIR T420 红外相机获得热像图，并使用 ThermoHuman 软件版本 2.12 进行分析，将身体分为七个感兴趣区域（ROI）。结果表明，肥胖青少年的所有 ROI 的平均 Tsk 值均低于非肥胖青少年（<0.05），尤其是全身 Tsk（0.91°C）、前（1.28°C）和后躯干（1.18°C），具有“非常大”的效应量值。所有 ROI 均呈负相关（<0.01），主要在前部（r = -0.71，<0.001）和后躯干（r = -0.65，<0.001）。根据肥胖的分类，为不同的 ROI 提出了热正常值表。总之，%BF 影响 IRT 评估的巴西男性青少年的 Tsk 值。
