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Title: Dosimetric Characteristics of the Siemens IGRT Carbon Fiber Tabletop

Abstract

In this work, the dosimetric characteristics of a new commercial carbon fiber treatment table are investigated. The photon beam attenuation properties of the Siemens image-guided radiation therapy (IGRT) tabletop were studied in detail. Two sets of dosimetric measurements were performed. In the first experiment a polystyrene slab phantom was used: the central axis attenuation and the skin-sparing detriment were investigated. In the second experiment, the off-axis treatment table transmission was investigated using a polystyrene cylindrical phantom. Measurements were taken at the isocenter for a 360 deg. rotation of the radiation beam. Our results show that the photon beam attenuation of the Siemens IGRT carbon fiber tabletop varies from a minimum of 2.1% (central axis) to a maximum of 4.6% (120 deg. and 240 deg. beam incidence). The beam entrance dose increases from 82% to 97% of the dose at the depth of maximum for a clinical 6-MV radiation field. The depth of maximum also decreases by 0.4 cm. Despite the wedge cross section of the table the beam attenuation properties of the IGRT tabletop remain constant along the longitudinal direction. American Association of Medical Dosimetrists.

Authors:
 [1];  [2]
  1. Servizio di Fisica Sanitaria, Policlinico S. Orsola-Malpighi, Bologna (Italy)
  2. Servizio di Fisica Sanitaria, Policlinico S. Orsola-Malpighi, Bologna (Italy), E-mail: aferri@aosp.bo.it
Publication Date:
OSTI Identifier:
21045986
Resource Type:
Journal Article
Resource Relation:
Journal Name: Medical Dosimetry; Journal Volume: 32; Journal Issue: 4; Other Information: DOI: 10.1016/j.meddos.2006.11.006; PII: S0958-3947(07)00053-2; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
61 RADIATION PROTECTION AND DOSIMETRY; ATTENUATION; CARBON FIBERS; CROSS SECTIONS; DEPTH DOSE DISTRIBUTIONS; IMAGES; PERTURBED ANGULAR CORRELATION; PHANTOMS; PHOTON BEAMS; POLYSTYRENE; RADIATION DOSES; RADIOTHERAPY; SKIN

Citation Formats

Spezi, Emiliano, and Ferri, Andrea. Dosimetric Characteristics of the Siemens IGRT Carbon Fiber Tabletop. United States: N. p., 2007. Web. doi:10.1016/j.meddos.2006.11.006.
Spezi, Emiliano, & Ferri, Andrea. Dosimetric Characteristics of the Siemens IGRT Carbon Fiber Tabletop. United States. doi:10.1016/j.meddos.2006.11.006.
Spezi, Emiliano, and Ferri, Andrea. Mon . "Dosimetric Characteristics of the Siemens IGRT Carbon Fiber Tabletop". United States. doi:10.1016/j.meddos.2006.11.006.
@article{osti_21045986,
title = {Dosimetric Characteristics of the Siemens IGRT Carbon Fiber Tabletop},
author = {Spezi, Emiliano and Ferri, Andrea},
abstractNote = {In this work, the dosimetric characteristics of a new commercial carbon fiber treatment table are investigated. The photon beam attenuation properties of the Siemens image-guided radiation therapy (IGRT) tabletop were studied in detail. Two sets of dosimetric measurements were performed. In the first experiment a polystyrene slab phantom was used: the central axis attenuation and the skin-sparing detriment were investigated. In the second experiment, the off-axis treatment table transmission was investigated using a polystyrene cylindrical phantom. Measurements were taken at the isocenter for a 360 deg. rotation of the radiation beam. Our results show that the photon beam attenuation of the Siemens IGRT carbon fiber tabletop varies from a minimum of 2.1% (central axis) to a maximum of 4.6% (120 deg. and 240 deg. beam incidence). The beam entrance dose increases from 82% to 97% of the dose at the depth of maximum for a clinical 6-MV radiation field. The depth of maximum also decreases by 0.4 cm. Despite the wedge cross section of the table the beam attenuation properties of the IGRT tabletop remain constant along the longitudinal direction. American Association of Medical Dosimetrists.},
doi = {10.1016/j.meddos.2006.11.006},
journal = {Medical Dosimetry},
number = 4,
volume = 32,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}