Spiral fault radiotherapy equipment output dose calibration die body

The invention relates to a spiral fault radiotherapy equipment output dose calibration die body, which comprises a cylindrical water body box, the water body box is provided with an ionization chamber socket for an ionization chamber to be inserted along the axial direction, and the end face of the water body box is provided with a water injection port. The ionization chamber is inserted into the water body tank from the ionization chamber conduit and is in direct contact with water. The beneficial effects of the invention are that the water body box with the same structure as a cheese die body is adopted, and water is used as a medium for radiotherapy dose calibration, so that calibration errors caused by using the cheese die body to calibrate the dose of tomo equipment are eliminated, and a real and accurate output dose is obtained; the structural design that the ionization chamber is directly inserted into water is adopted, the structure of the water injection port can prevent gas from being left in the wa