25 MV X-ray beam characteristics from a 35 MeV linear accelerator

James A. Purdy; David J. Keys; Fred G. Abrath

doi:10.1016/0360-3016(78)90162-1

25 MV X-ray beam characteristics from a 35 MeV linear accelerator

James A. Purdy, David J. Keys, Fred G. Abrath

Department of Radiation Oncology

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

This manuscript presents characteristic dosimetry measurements for the 25 MV X-ray beam from the Varian Associates Clinac^® 35 linear accelerator. The quality of the beam is expressed by its attenuation as a narrow beam in lead. Percentage depth dose tables are given as a function of field size for square fields. Tissue-phantom ratios are tabulated for square field sizes. A study of the variation of the dose in the buildup region demonstrates that surface dose and the depth of maximum dose is a strong function of the field size. Other beam parameters measured and discussed include field flatness and symmetry, penumbra, and applicability of inverse square law.

Original language	English
Pages (from-to)	337-343
Number of pages	7
Journal	International journal of radiation oncology, biology, physics
Volume	4
Issue number	3-4
DOIs	https://doi.org/10.1016/0360-3016(78)90162-1
State	Published - 1978

Keywords

Dosimetry
Linear accelerator
Measurement techniques

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10.1016/0360-3016(78)90162-1

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title = "25 MV X-ray beam characteristics from a 35 MeV linear accelerator",

abstract = "This manuscript presents characteristic dosimetry measurements for the 25 MV X-ray beam from the Varian Associates Clinac{\textregistered} 35 linear accelerator. The quality of the beam is expressed by its attenuation as a narrow beam in lead. Percentage depth dose tables are given as a function of field size for square fields. Tissue-phantom ratios are tabulated for square field sizes. A study of the variation of the dose in the buildup region demonstrates that surface dose and the depth of maximum dose is a strong function of the field size. Other beam parameters measured and discussed include field flatness and symmetry, penumbra, and applicability of inverse square law.",

keywords = "Dosimetry, Linear accelerator, Measurement techniques",

author = "Purdy, {James A.} and Keys, {David J.} and Abrath, {Fred G.}",

note = "Funding Information: tProject partially supported by United States Public Health Service (USPHS) Cancer Center No. 1 PO 2 CA 13053, National Cancer Institute, National Institutes of Health, USPHS. SProject partially supported by USPHS Cancer Center",

year = "1978",

doi = "10.1016/0360-3016(78)90162-1",

language = "English",

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pages = "337--343",

journal = "International journal of radiation oncology, biology, physics",

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T1 - 25 MV X-ray beam characteristics from a 35 MeV linear accelerator

AU - Purdy, James A.

AU - Keys, David J.

AU - Abrath, Fred G.

N1 - Funding Information: tProject partially supported by United States Public Health Service (USPHS) Cancer Center No. 1 PO 2 CA 13053, National Cancer Institute, National Institutes of Health, USPHS. SProject partially supported by USPHS Cancer Center

PY - 1978

Y1 - 1978

N2 - This manuscript presents characteristic dosimetry measurements for the 25 MV X-ray beam from the Varian Associates Clinac® 35 linear accelerator. The quality of the beam is expressed by its attenuation as a narrow beam in lead. Percentage depth dose tables are given as a function of field size for square fields. Tissue-phantom ratios are tabulated for square field sizes. A study of the variation of the dose in the buildup region demonstrates that surface dose and the depth of maximum dose is a strong function of the field size. Other beam parameters measured and discussed include field flatness and symmetry, penumbra, and applicability of inverse square law.

AB - This manuscript presents characteristic dosimetry measurements for the 25 MV X-ray beam from the Varian Associates Clinac® 35 linear accelerator. The quality of the beam is expressed by its attenuation as a narrow beam in lead. Percentage depth dose tables are given as a function of field size for square fields. Tissue-phantom ratios are tabulated for square field sizes. A study of the variation of the dose in the buildup region demonstrates that surface dose and the depth of maximum dose is a strong function of the field size. Other beam parameters measured and discussed include field flatness and symmetry, penumbra, and applicability of inverse square law.

KW - Dosimetry

KW - Linear accelerator

KW - Measurement techniques

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U2 - 10.1016/0360-3016(78)90162-1

DO - 10.1016/0360-3016(78)90162-1

M3 - Article

C2 - 640908

AN - SCOPUS:0017863839

SN - 0360-3016

VL - 4

SP - 337

EP - 343

JO - International journal of radiation oncology, biology, physics

JF - International journal of radiation oncology, biology, physics

IS - 3-4

ER -

25 MV X-ray beam characteristics from a 35 MeV linear accelerator

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