Uncertainty contribution at NIS phototherapy irradiance facility

国家标准研究所光线疗法辐照设备的不确定度分配（英文）

Phototherapy lamps are the most effective and safest in the treatment of several medical treatments such as bilirubin. They transfer radiant energy expressed by irradiance unit in W/m2 into the skin specifically to achieve a therapeutic reduction in the bilirubin concentration in the blood. National Institute for Standards （NIS） in Egypt builds up a radiometric method to en- sure the competence of phototherapy sources （luminaire） to the standard international and national requirements. Hence, NIS provides traceability to customer through unbroken chain of phototherapy radiometer calibrated as irradiance response in W/m2. Uncertainty model including all parameters accompanied with the measurements is studied.