Ultrasound treatment head for an apparatus for treating a patient with ultrasound

An ultrasound treatment head for an apparatus for treating a patient with ultrasound, comprising:

• at least one ultrasound active element, wherein the active element is provided with a positioning ring protruding with respect to the active element;
• and
• a vacuum cup configured to hold the treatment head on a body part of a patient, when an underpressure is generated within a vacuum chamber with a holding space within the vacuum cup, the vacuum cup comprising:
• an upper portion wherein the active element is mounted in the upper portion, the upper portion having a first wall thickness;
• a middle stiffening portion extending from the upper portion;
• and
• a bottom portion extending from the middle portion, the bottom portion having a second wall thickness that is greater than the first wall thickness, a lower aperture having a first area bounded by a bottom edge, and an upper aperture having a second area opening into the middle portion, the first area being greater than the second area, wherein when an underpressure is generated within the vacuum chamber, the bottom edge of the bottom portion is configured to form a seal with the patient's skin and wherein when a seal is formed with the skin a greater underpressure is generated which causes the upper portion to draw into the vacuum chamber such that the ultrasound active element is positioned proximate the patient's skin, and wherein the upper portion is configured to act as a spring suspension to raise the active element from the bottom portion when there is no underpressure in the vacuum cup.