在与金属板的受控接触过程中对手部冷却动力学的定量红外热成像评估
Quantitative Infrared Thermographic Assessment of Hand Cooling Dynamics During Controlled Contact with Metal Plates
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中文总结 AI 辅助
该研究通过SWIR、MWIR和LWIR热成像技术，研究人体手部受控接触冷却时的热响应。在五个区域分析温度变化并提取定量指标，发现手指区域热敏感性高，MWIR和LWIR冷却动力学一致，频域分析有特定范围，还明确了关键因素，证明动态红外热成像可评估外周体温调节和血管功能。
中文摘要 AI 辅助
本研究使用短波红外（SWIR）、中波红外（MWIR）和长波红外（LWIR）热成像技术，研究了人体手部在受控接触冷却过程中的时空热响应。三名参与者同时将一只手放在冷却金属板上，另一只手放在接近室温的参考板上。在五个解剖区域分析温度变化，包括手指远端、手指近端、血管相关区域、非血管区域和前臂。从热图像序列中提取了温度变化、双侧温差、初始冷却速率和频域幅度等定量指标。结果表明，手指区域温度降低最大，冷却速率最高，对热刺激的敏感性高于手背和前臂。MWIR和LWIR测量显示出高度一致的冷却动力学，而LWIR成像提供了增强的热对比度和灵敏度。频域分析表明，主要热响应集中在低于0.05Hz的低频范围内。此外，逐像素冷却速率图突出了整个手部表面的显著空间异质性。数值生物热模拟证实，血液灌注和皮肤与板的接触电导是控制冷却响应的关键因素。这些发现证明了动态红外热成像作为一种非接触工具，在受控冷却实验中评估外周体温调节和血管功能的潜力。
英文摘要
This study investigates the spatiotemporal thermal response of human hands during controlled contact cooling using short wave infrared (SWIR), mid wave infrared (MWIR), and long wave infrared (LWIR) thermography. Three participants simultaneously placed one hand on a cooling metal plate and the contralateral hand on a reference plate maintained near room temperature. Temperature evolution was analyzed in five anatomical regions, including the distal finger, proximal finger, vessel associated region, non vessel region, and forearm. Quantitative metrics, including temperature variation, bilateral temperature difference, initial cooling rate, and frequency-domain amplitude, were extracted from the thermal image sequences. The results showed that the finger regions exhibited the largest temperature reductions and highest cooling rates, indicating greater sensitivity to thermal stimulation than the dorsal hand and forearm. MWIR and LWIR measurements revealed highly consistent cooling dynamics, while LWIR imaging provided enhanced thermal contrast and sensitivity. Frequency-domain analysis demonstrated that the dominant thermal response was concentrated in the low frequency range below 0.05 Hz. Furthermore, pixel-wise cooling rate maps highlighted substantial spatial heterogeneity across the hand surface. Numerical bioheat simulations confirmed that blood perfusion and skin plate contact conductance are key factors governing the cooling response. These findings demonstrate the potential of dynamic infrared thermography as a non-contact tool for assessing peripheral thermoregulation and vascular function during controlled cooling experiments.
