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Field equivalence for clinical electron beams
1Department of Radiation Oncology, Fairview University Medical Center, Minneapolis, MN 55455, USA.
Physics in Medicine and Biology
|February 24, 2001
Abstract:
The concept of field equivalence for electron beams is examined using a pencil beam theory applied to circular fields. It is shown that a circular field can be found for a field of any size, shape and energy for which the depth dose distribution is approximately equivalent. The usefulness of the concept in clinical dosimetry is discussed.