| abstract |
During hyperthermia treatment of the head and neck region, conventional water bladders used to direct electromagnetic waves and cool the patient's skin in such treatments may collapse onto the patient's face due to the weight and/or pressure of the water within the water bladder. An insert may be provided inside the water bladder to remedy this, wherein the insert provides additional rigidity and thus resistance to the weight and pressure of water. However, the insert should not be too resistant to the shape of the patient, and therefore, the insert provides a first stiffness in the first load direction and a second stiffness in the second load direction, wherein the first stiffness is not equal to the second stiffness. |