The 3D Systems VSP Bolus product is a device that will be placed on the skin of a patient as a radiotherapy accessory intended to help control the radiation dose received by the patient. VSP Bolus is generated using input from radiation therapy professionals and medical imaging data to produce a bolus that is specific to the patient being treated. The VSP Bolus product is verified and approved by the radiation therapy professional prior to use on the patient, and is intended for patients of all ages receiving radiotherapy treatment. VSP Bolus was evaluated using 6 MV photons but has not been assessed for use with protons, electrons, or at orthovoltage X-rays.
A pliable, solid, non-sterile material (e.g., firm gel, paraffin, silicone) that has the properties of skin when irradiated and is intended to be applied to the skin to modify radiation dose at the skin surface or depth. It is available in various static thicknesses (e.g., 0.5 to 4.0 cm), which may be cut by the operator, to provide a reproducible radiation beam modifier for a prescribed dose depth during treatment of a particular site and disease. This is a single-use device.