In laser treatments, the difference in patient's degree of skin pigmentation is an important factor that can lead to medical accidents. However, the conventional heat transfer model is not available to analyze the effect of degree of pigmentation on the laser treatments. Therefore, we propose a new microscopic radiation heat transfer model that takes into account the point heat sources for the laser treatments. In the proposed model, skin considered as a bulk medium consisting of two layers, namely normal and pigmentation layers with the latter containing a larger number of melanosomes having a specific volume fraction (f_v,mel) as the degree of pigmentation. Using the proposed model, it was found that the distribution of the absorbed laser energy and temperature rise of the skin tissue is affected by the degree of pigmentation. When f_v,mel is high, the absorbed energy per single melanosome and thus the temperature rise of the pigmentation layer is lower than that in the deeper skin tissue. It was also shown that depending on f_v,mel, the distance between melanosomes decreases. When f_v,mel is high, the temperature of skin tissue between melanosomes increases.

在激光治疗中，患者皮肤色素沉着程度的差异是可能导致医疗事故的重要因素。但是，传统的传热模型无法用于分析色素沉着程度对激光处理的影响。因此，我们提出了一种新的微观辐射传热模型，该模型考虑了激光处理的点热源。在建议的模型中，皮肤被视为由两层组成的整体介质，即正常层和色素沉着层，后者包含大量具有特定体积分数（f _v，mel的黑素体））作为色素沉着的程度。使用提出的模型，发现吸收的激光能量的分布和皮肤组织的温度升高受色素沉着程度的影响。当f _v，mel高时，每个单黑素体的吸收能量，因此色素沉着层的温度上升低于较深层皮肤组织的温度上升。还显示出，取决于f _v，mel，黑素体之间的距离减小。当f _v，mel高时，黑素体之间的皮肤组织温度升高。