Patent ID: 8183522
Filing Date: 2012-05-22
Classification: A61N,G01T

Abstract:
1. A water phantom which measures and determines a dose distribution of radiation produced by a beam selected from the group consisting of a particle beam or photon radiation beam, the water phantom comprising: a water tank, the water tank having an upper tank and a lower tank, an upper base between the upper and lower tank, a lower base at a bottom of the lower tank, and side walls, the upper base having an array of a plurality of water admission passages extending through the upper base; and a water supply system which supplies water to the water tank, the lower tank configured to be connected to the water supply system to allow a flow of water upward from the lower tank into the upper tank through the array of the plurality of water admission passages in the upper base, the array effective to provide an unturbulent water flow within the upper tank.