The midline dose distribution for a three-field radiotherapy technique

Sanford L Meeks; Revlon O Williams; Francis J Bova; William M Mendenhall; John M Buatti

doi:10.1016/S0958-3947(99)00008-4

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The midline dose distribution for a three-field radiotherapy technique

Journal article

Peer reviewed

The midline dose distribution for a three-field radiotherapy technique

Sanford L Meeks, Revlon O Williams, Francis J Bova, William M Mendenhall and John M Buatti

Medical dosimetry : official journal of the American Association of Medical Dosimetrists, Vol.24(2), pp.91-98

1999

DOI: 10.1016/S0958-3947(99)00008-4

PMID: 10379506

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Abstract

At the University of Florida, head and neck cancer often is irradiated using parallel opposed lateral fields (with inferior borders slanted superiorly) and an anterior low neck field. A common criticism is that overlap may occur at the match-line junction of the three fields, resulting in an increased risk of radiation myelitis. One setup for treatment of the oropharynx and two for the larynx were irradiated in an anthropomorphic head and neck phantom made of tissue-equivalent polyacrylamide gel with a two-dimensional thermoluminescent dosimeter array in its sagittal midplane. The results showed that no excess radiation dose was measured at the junction of the three fields. The “spinal cord dose,” as percentage of dose to the central axis of the primary field, was as follows: oropharynx setup, 15% to 100%; larynx setup with midline tracheal block, 10% to 90%; larynx setup without tracheal block, 10% to 90%. In conclusion, the University of Florida three-field technique for head and neck cancer produces no measured increase in dose at field junctions.

Oropharyngeal neoplasms

Head and neck neoplasms

Radiotherapy dosage

Laryngeal neoplasms

Computer-assisted radiotherapy planning

Details

Title: Subtitle: The midline dose distribution for a three-field radiotherapy technique
Creators: Sanford L Meeks - Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, FL, USA
Revlon O Williams - Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, FL, USA
Francis J Bova - Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, FL, USA
William M Mendenhall - Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, FL, USA
John M Buatti - Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, FL, USA
Resource Type: Journal article
Publication Details: Medical dosimetry : official journal of the American Association of Medical Dosimetrists, Vol.24(2), pp.91-98
Publisher: Elsevier Inc
DOI: 10.1016/S0958-3947(99)00008-4
PMID: 10379506
ISSN: 0958-3947
eISSN: 1873-4022
Language: English
Date published: 1999
Academic Unit: Radiation Oncology; Neurosurgery; Otolaryngology
Record Identifier: 9984040577402771

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