Water die body used for long distance radiotherapy equipment output measurement and application thereof

Abstract

The invention relates to a water die body used for long distance radiotherapy equipment output measurement and an application thereof. A water die body portion mainly comprises a box body. A top of the box body possesses a groove. Te box body is provided with an ionization chamber jack. A side portion of the box body is provided with a water injection knob. A bottom portion of the box body possesses a water discharge knob. The bottom portion of the box body also possesses a gas release knob. An internal portion of the box body possesses a separation plate. The separation plate divides the internal portion of the box body into a first chamber and a second chamber. The separation plate is provided with an embossment portion. The embossment portion possesses a through hole used for connecting the first chamber and the second chamber. The water discharge knob possesses a groove portion used for accommodating the embossment portion. The water discharge knob is used for controlling on and off of the first chamber and the second chamber. In the invention, an existing standard water tank is improved, the water tank possesses an internal interlayer and a medium of the interlayer is water containing a gas so that a water volume in the interlayer and an air volume are in a dynamic balancing state and then a condition that the water die body is damaged because of thermal expansion and cold contraction of water is avoided.

Description

technical field [0001] The invention relates to the field of radiotherapy equipment, in particular to a water phantom used for output measurement of teletherapy equipment and its application. Background technique [0002] At present, there are two types of water phantoms used for the output measurement of the known teletherapy equipment: open type and sealed type. The sealed water tank has the advantages of simple measurement and almost no change in parameter control, but the distance from the ionization chamber to the surface of the sealed water phantom is fixed. The known open water model body has a water discharge valve (faucet) and one or more ionization chamber jacks, by controlling the water tap to release water into the bucket, the water depth can be changed. If it is necessary to increase the water depth, use a water cup to scoop water from the bucket to the water tank, so as to control the distance from the water surface to the ionization chamber. The distance vari...

AI Technical Summary

Problems solved by technology

[0003] However, the structure of the standard water phantom does not take into account the thermal expansion and contraction caused by the change in the volume of water due to temperature changes.

When the temperature changes greatly, the volume of water will also change, which will cause certain damage to the water model body wall and affect the normal operation of the detection work.

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