Abstract: A method for protecting mammalian skin against photodamage caused by an exposure to a damaging radiation. The method includes irradiating the mammalian skin before the exposure to the damaging radiation with a protective radiation, the protective radiation including radiation having a wavelength larger than the wavelength of the damaging radiation, the protective radiation being irradiated onto the mammalian skin under conditions suitable for reducing photodamage to the mammalian skin caused by the damaging radiation.

Abstract: A method and device for causing a predetermined physiological change in a mammalian tissue. The method includes irradiating the tissue with a radiation having a power density in the tissue substantially larger than an activation threshold power density, the tissue being irradiated under conditions suitable to cause the predetermined physiological change. The device can emit raditation and forms to the anatomy of a patient. The device can both cool the patient and treatment head using one cooling system.

Abstract: A method and device for causing a predetermined physiological change in a mammalian tissue. The method includes irradiating the tissue with a radiation having a power density in the tissue substantially larger than an activation threshold power density, the tissue being irradiated under conditions suitable to cause the predetermined physiological change. The device can emit radiation and forms to the anatomy of a patient. The device can both cool the patient and treatment head using one cooling system.

Abstract: A photoactivation device for modulating the physiology of a target biological activity by directing a photoactivating beam of light having a predetermined set of photoactivating light parameters on a target surface, the device comprising: a photoactivating light source for emitting the photoactivating beam of light; a positioning means operatively coupled to the photoactivating light source for allowing selective positioning of the photoactivating light source relative to the target surface; a position evaluating means for evaluating the position of the photoactivating light source relative to the target surface.