A method and system for ultrasound treatment are provided. Acoustic energy, including ultrasound, can serve as input energy to a mask with apertures, such apertures acting as secondary acoustic sources to create a modulated output acoustic energy in a treatment region and treatment effects. Under proper control output energy can be precisely placed and controlled in tissue. In some embodiments, methods and systems are configured for ultrasound treatment based on creating an output energy distribution in tissue. In some embodiments, methods and systems are configured based on creating an output temperature distribution in tissue.
