Patterned thermal treatment using patterned cryogen spray and irradiation by light

摘要

A spray of cryogen is patterned to create a pattern of cooled regions on a target tissue for cosmetic dermatological treatment. In one embodiment, the cryogen is patterned using a heated mask. An optical source is configured to irradiate the target tissue in a region at least partially overlapping the cooled regions to create a pattern of treatment zones. A control unit adjusts the timing of between the cryogen and optical pulses.