Figure 5: Comparison of irradiation with water-filtered infrared-A and with conventional infrared
Thermographical comparison of skin surface temperatures in the lumbar region 12 minutes after beginning of irradiation with water-filtered infrared-A (left) and conventional infrared (right) with the same irradiance: the skin surface temperature is higher in case of irradiation with conventional infrared (presented in the thermography), while temperature in 1 cm depth of tissue is higher when irradiating with water-filtered infrared-A (from [45]). So water-filtered infrared-A presents a high tissue penetration combined with a low thermal load to the skin surface.