Measurements of secondary neutron dose from 15 MV and 18 MV IMRT

Rebecca M. Howell; Michele S. Ferenci; Nolan E. Hertel; Gary D. Fullerton; Timothy Fox; Lawrence W. Davis

doi:10.1093/rpd/nci041

Measurements of secondary neutron dose from 15 MV and 18 MV IMRT

Rebecca M. Howell, Michele S. Ferenci, Nolan E. Hertel, Gary D. Fullerton, Timothy Fox, Lawrence W. Davis

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

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Abstract

Secondary neutron dose-equivalents were determined for conventional and intensity modulated radiation therapy (IMRT) prostate treatments for 15 and 18 MV X-ray beams. Conventional and IMRT treatment plans were generated to deliver 45 Gy to the prostate, seminal vessicles and external and internal iliac lymph nodes. Neutron spectra were determined by unfolding measurements from a TLD-based Bonner sphere system. Treatments using 18 MV IMRT and conventional plans result in neutron ambient dose-equivalents of 687 and 112 mSv, respectively. Delivery of the 15 MV IMRT and conventional plans results in neutron ambient dose-equivalents of 327 and 52 mSv, respectively. The data illustrate that using lower photon energies for IMRT reduces the secondary neutron dose, while still achieving comparable treatment volume coverage and sparing critical normal tissue.

Original language	English (US)
Pages (from-to)	508-512
Number of pages	5
Journal	Radiation protection dosimetry
Volume	115
Issue number	1-4
DOIs	https://doi.org/10.1093/rpd/nci041
State	Published - Dec 2005

All Science Journal Classification (ASJC) codes

Public Health, Environmental and Occupational Health
Radiation
Radiological and Ultrasound Technology
Radiology Nuclear Medicine and imaging

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10.1093/rpd/nci041

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title = "Measurements of secondary neutron dose from 15 MV and 18 MV IMRT",

abstract = "Secondary neutron dose-equivalents were determined for conventional and intensity modulated radiation therapy (IMRT) prostate treatments for 15 and 18 MV X-ray beams. Conventional and IMRT treatment plans were generated to deliver 45 Gy to the prostate, seminal vessicles and external and internal iliac lymph nodes. Neutron spectra were determined by unfolding measurements from a TLD-based Bonner sphere system. Treatments using 18 MV IMRT and conventional plans result in neutron ambient dose-equivalents of 687 and 112 mSv, respectively. Delivery of the 15 MV IMRT and conventional plans results in neutron ambient dose-equivalents of 327 and 52 mSv, respectively. The data illustrate that using lower photon energies for IMRT reduces the secondary neutron dose, while still achieving comparable treatment volume coverage and sparing critical normal tissue.",

author = "Howell, {Rebecca M.} and Ferenci, {Michele S.} and Hertel, {Nolan E.} and Fullerton, {Gary D.} and Timothy Fox and Davis, {Lawrence W.}",

note = "Funding Information: Work performed by R. M. H. in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Medical Physics in the Department of Radiological Sciences at the University of Texas Health Science Center at San Antonio. This work was funded in part by the Georgia Cancer Coalition.",

year = "2005",

month = dec,

doi = "10.1093/rpd/nci041",

language = "English (US)",

volume = "115",

pages = "508--512",

journal = "Radiation protection dosimetry",

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publisher = "Oxford University Press",

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T1 - Measurements of secondary neutron dose from 15 MV and 18 MV IMRT

AU - Howell, Rebecca M.

AU - Ferenci, Michele S.

AU - Hertel, Nolan E.

AU - Fullerton, Gary D.

AU - Fox, Timothy

AU - Davis, Lawrence W.

N1 - Funding Information: Work performed by R. M. H. in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Medical Physics in the Department of Radiological Sciences at the University of Texas Health Science Center at San Antonio. This work was funded in part by the Georgia Cancer Coalition.

PY - 2005/12

Y1 - 2005/12

N2 - Secondary neutron dose-equivalents were determined for conventional and intensity modulated radiation therapy (IMRT) prostate treatments for 15 and 18 MV X-ray beams. Conventional and IMRT treatment plans were generated to deliver 45 Gy to the prostate, seminal vessicles and external and internal iliac lymph nodes. Neutron spectra were determined by unfolding measurements from a TLD-based Bonner sphere system. Treatments using 18 MV IMRT and conventional plans result in neutron ambient dose-equivalents of 687 and 112 mSv, respectively. Delivery of the 15 MV IMRT and conventional plans results in neutron ambient dose-equivalents of 327 and 52 mSv, respectively. The data illustrate that using lower photon energies for IMRT reduces the secondary neutron dose, while still achieving comparable treatment volume coverage and sparing critical normal tissue.

AB - Secondary neutron dose-equivalents were determined for conventional and intensity modulated radiation therapy (IMRT) prostate treatments for 15 and 18 MV X-ray beams. Conventional and IMRT treatment plans were generated to deliver 45 Gy to the prostate, seminal vessicles and external and internal iliac lymph nodes. Neutron spectra were determined by unfolding measurements from a TLD-based Bonner sphere system. Treatments using 18 MV IMRT and conventional plans result in neutron ambient dose-equivalents of 687 and 112 mSv, respectively. Delivery of the 15 MV IMRT and conventional plans results in neutron ambient dose-equivalents of 327 and 52 mSv, respectively. The data illustrate that using lower photon energies for IMRT reduces the secondary neutron dose, while still achieving comparable treatment volume coverage and sparing critical normal tissue.

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IS - 1-4

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Measurements of secondary neutron dose from 15 MV and 18 MV IMRT

Abstract

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