| 摘要 |
<p>A device for generating helical electron beams that can be used for radiation therapy is disclosed. The device contains a tertiary collimating cone (50) that can be attached to a gantry (51) of a linear accelerator or placed directly below the gantry. The tertiary collimating cone has a dynamic energy compensator (3) and a magnetic electron collimator (16) to modify the energy of electrons and to generate a helical trajectory. A multileaf collimator (12) may be present within the tertiary collimating cone. A computer (7) coordinates the movements of various components. The helical electron beam produced by this device can be targeted to tumors better and safer and reduce the amount of radiation hitting normal tissue than current devices.</p> |
