Patent ID: 8435234

Claim:
A method of dermatological treatment, the method comprising: applying a viscous material to a region of skin tissue to be treated; emitting treatment energy from a handpiece towards the region of skin tissue to effect tissue treatment, the treatment energy comprising a variable operational parameter that affects a dosage of the tissue treatment; moving the handpiece across the region of skin tissue, the movement of the handpiece comprising a variable positional parameter that affects the dosage of the tissue treatment; forming an imageable pattern comprising a plurality of ridges of the viscous material that are produced as the viscous material conforms under the movement of the handpiece over the viscous material and across the region of skin tissue; directing illumination toward the ridges of the viscous material in the imageable pattern; imaging in real-time a pattern of the illumination that is reflected from the ridges of the viscous material; determining the variation in the positional parameter from the imaged pattern of the illumination; and controllably adjusting in real-time the operational parameter in response to the variation in the positional parameter determined from the imaged pattern of the illumination, wherein the viscous material has a viscosity greater than 2*10 3 cP such that the shape of the ridges is retained in the viscous material while the pattern of illumination is detected in real-time.