The type of ultrasound used with Ultherapy is called micro-focused ultrasound (MFU). This is a narrower, more focused type of ultrasound than high-intensity focused ultrasound (HIFU), which is also marketed for aesthetic purposes. The problem with HIFU technologies is that they can reach bone and fat, which can be more painful. They also do not come with imaging screens. This means their treatments must be done ‘blindly.’ Hitting the wrong areas with ultrasound can have adverse results, such as unintentional fat loss, or worse. Or, they can simply have no effect. For this reason, Ultherapy is by far, the safer, more effective choice.