The result of applying the algorithm. It automatically recognizes areas subjected to forcing and marks them in red. This makes possible to calculate errors due to the presence of irradiation-overlapping, as well as irradiation-free areas. The evaluation of these areas is critical from a clinical point of view; stacking or overlapping of pulses, and/or excessive number of laser passes all may result in excessive tissue damage. Repeated CO2 laser passes will dehydrate and coagulate dermis, which subsequently limits the penetration of laser energy. Because a large part of the heat in subsequent passes or overlapping pulses is not actually used to ablate the skin, the thermal loading of tissue increases.