| abstract |
During thermal treatment of the head and neck region, a conventional water bolus used for a treatment that induces electromagnetic waves and cools the patient's skin may fall on the patient's face due to the weight and/or pressure of water in the water bolus. To improve this, an insert may be provided inside the water bolus, and the insert provides additional rigidity to provide resistance to the weight and pressure of water. However, since the insert should not have undue resistance to the shape of the patient, the insert is provided with a first stiffness in a first load direction and a second stiffness in a second load direction, wherein the first stiffness equals the second stiffness don't |