Nokia litter boxer

What is the name of the method to prevent melanoma? - melanoma photos

Hello, I have learned that one way of melanoma in a systematic inspection of the skin by a doctor. I know the doctor is limited to visual inspection, but I've heard that it is a powerful. It is on the pictures of moles and the comparison of the following images based (made with an interval of time). I would like to know the name of the method.