Abutment of high energy electron fields

William B. Harms, James A. Purdy

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


The problem of positioning multiple electron fields on the skin surface is complicated by the fact that the scattering properties of electrons result in constriction of the higher value isodoses and bulging out of the lower value isodoses. We have studied the dose distributions in the junction region for adjacent electron fields using our 3-dimensional radiation treatment planning system by investigating the effects of field separation for several field size, air gap, and beam energy combinations. Film dosimetry was used to measure specific test cases. Using our 3-dimensional radiation treatment planning system, we are able to display the calculated dose distribution, calculate dose-volume histograms, and compare calculations with the film dosimetry measurements. Results of our study are presented.

Original languageEnglish
Pages (from-to)853-858
Number of pages6
JournalInternational journal of radiation oncology, biology, physics
Issue number4
StatePublished - Apr 1991


  • Electron beams
  • Field abutment
  • Field gapping


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