System and method for variable depth ultrasound treatment

An ultrasound system for providing energy deposition at more than one depth, the system comprising:

• a variable depth transducer system comprising a transducer and a variable depth element, the variable depth transducer operable to provide energy deposition into tissue comprising at least a deep region and an inner region, the transducer comprising at least one surface configured to emit ultrasound energy at a frequency, the variable depth element comprising a frequency dependent device configured for spatial control of a focal depth of the energy deposition into the tissue by changing the frequency of the ultrasound energy emitted from the at least one surface of the transducer;
• and
• a controller in communication with the transducer and the variable depth element, the controller comprising a control of a frequency range of the ultrasound energy emitted from the at least one surface of the transducer.

An ultrasound system for providing energy deposition at more than one depth, the system comprising:

• a variable depth transducer system comprising a transducer having at least one surface configured to emit energy to a region of interest at a frequency, and a variable depth element comprising a frequency dependent device configured to simultaneously convert the energy, emitted by the at least one surface of the transducer, into at least three different frequencies and provide energy deposition to at least three different depths in the region of interest;
• and
• a controller in communication with the transducer and the variable depth element, the controller comprising a control of a frequency range of the energy emitted by the at least one surface of the transducer.