Beam Modification for Cancer Radiation Therapy.
Abstract
A method for designing radiation therapy beam modifiers is proposed in this thesis. The design is based on a calculated dose distribution in the patient from an unmodified treatment beam. The modifier alters the beam before it reaches the patient in a way that yields the desired dose profile at the tumor while minimizing the dose to healthy tissues. The design can be generalized to include any modifier material and any beam energy. The design was applied to an anthropomorphic phantom and verified using thermoluminescent dosimetry. The modifier was constructed of 1/2 inch square aluminum blocks. The dose distribution in the phantom, with and without beam modification, was measured. The modified dose profile approaches the desired distribution (maximum deviation of + or - 5%). Procedures for improving the results are suggested for further work. Additional keywords: tissue compensation; charts. (Author).
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1985
- Accession Number
- ADA154634
Entities
People
- J. M. Keller
Organizations
- Air Force Institute of Technology