| abstract |
In a method for removing hair using ultrasound, one or more pulses of ultrasound energy are applied to the tissue at a frequency (e.g. 5-15 MHz) selected to deliver the energy a tissue depths corresponding to those at which hair follicles are located. Pulse widths are selected to correspond to thermal relaxation times for hair. The skin may be optionally cooled before, during, and/or after ultrasound exposure. |