Devices and methods for radiation-based dermatological treatments

A device for providing a dermatological treatment, the device comprising:

• a device body;
• a radiation delivery system for delivering radiation to the skin to provide a dermatological treatment,
• a situation-specific control system, comprising:
• a plurality of sensors including (a) at least two movement sensors configured to detect movement of the device across the skin and (b) at least two skin contact sensors configured to detect contact with the skin;
• electronics programmed to:
• receive signals from the plurality of sensors;
• before radiation is initiated, determine, based on signals received from the plurality of sensors, whether a first set of conditions for initiating radiation delivery by the radiation delivery system is satisfied, the first set of conditions requiring (a) detection of contact with the skin by a first number of the skin contact sensors and (b) detection of a predefined device movement across the skin by a second number of the movement sensors;
• initiating radiation delivery by the radiation delivery system if the first set of conditions is satisfied;
• and
• once radiation is initiated, determine, based on signals received from the plurality of sensors, whether a second set of conditions for continuing radiation delivery by the radiation delivery system is satisfied, the second set of conditions requiring (a) detection of contact with the skin by a third number of the skin contact sensors, wherein the third number is less than the first number and (b) detection of a predefined device movement across the skin by a fourth number of the movement sensors, wherein the fourth number is less than the second number.