Unfiltered radiation therapy
First Claim
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1. A method for producing high energy X-rays for radiation therapy at patient'"'"'s level comprising the steps of:
- using a linear accelerator without a flattening filter to provide a high radiation dose having a dose distribution;
wherein the radiation dose is high energy X-rays ranging from 6 MV to 25 MV;
using inverse planning to shape the dose distribution, increase dose rate and shorten treatment time; and
radiating a patient in need of radiation therapy with the shaped radiation field.
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Abstract
This is a new technique of producing high energy X-rays for radiation therapy at a patient'"'"'s level. The dose delivery system uses a linear accelerator with no flattening filter. The technique improves patient radiation therapy by reducing radiation scattered to surrounding normal tissue and reducing electron contamination. It increases dose rate to shorten treatment time. The flattening filter reduces the efficiency of the beam by reducing the fluence and increasing scattered radiation. This technique involves removal of the flattening filter. It uses inverse planning to shape the dose distribution.
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11 Claims
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1. A method for producing high energy X-rays for radiation therapy at patient'"'"'s level comprising the steps of:
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using a linear accelerator without a flattening filter to provide a high radiation dose having a dose distribution; wherein the radiation dose is high energy X-rays ranging from 6 MV to 25 MV; using inverse planning to shape the dose distribution, increase dose rate and shorten treatment time; and radiating a patient in need of radiation therapy with the shaped radiation field. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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