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A study of dose distribution patterns from cobalt-60 and Varian Clinac-4 beams.

Authors
  • Nair, R
  • Kartha, M
Type
Published Article
Journal
AJR. American journal of roentgenology
Publication Date
Jan 01, 1978
Volume
130
Issue
1
Pages
150–153
Identifiers
PMID: 413401
Source
Medline
License
Unknown

Abstract

Dose distribution patterns of 4 MV x-rays from a Varian Clinac 4 linear accelerator are compared with those from a 60Co teletherapy machine. Field flatteners of lead and depleted uranium were used. Dose distribution maps display the off-axis high dose or "horns" with lead filters and circular dose distribution patterns. The uranium field flattener clearly "clipped the horns" and eliminated circular dose distribution patterns with larger fields.

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