The Vaser procedure is a significantly less invasive form of liposuction. It offers more effective and faster results and less discomfort for the patient. The traditional procedure consists of mechanically dislodging fat cells, with a back-and-forth movement of the cannula. The Vaser method is ultrasound-assisted and uses an added step that liquefies the fat cells before removing them. You can find more info about liposuction here