Radiation therapy test phantom

general purpose

Stationary water phantom Completely closed stationary water phantom for high energy photon dosimetry with PTW Farmer chambersMakes it possible to perform quick and reproducible photon calibration measurementsAccommodates a PTW Farmer chamber at a fixed measuring depth of 50 mmBeam markers on the top plateCompensates changes of the water volume caused by ambient temperature changesThe phantom T41014 is a stationary water phantom for absolute dosimetry and calibration measurements in radiation therapy. It is completely covered by acrylic (PMMA) plates. The external dimensions are approximately 20 cm x 20 cm x 10 cm. The entrance wall thickness is 3 mm, the measuring depth 50 mm. PTW Farmer ionization chambers fit exactly into the built-in chamber holder. The top plate features markers for beam adjustment. The phantom is filled with approximately 4 liters of water through a sealed fill plug. It is fitted with two elastic expansion vessels to adapt the phantom to different ambient temperatures and to ensure a constant measuring depth