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Calibration of {sup 192}Ir high dose rate brachytherapy sources

Abstract

A method for calibration of high dose rate sources used in afterloading brachytherapy systems is described. The calibration for {sup 192}Ir is determined by interpolating {sup 60}Co gamma-rays and 250 kV x-rays calibration factors. All measurements were done using the same build up caps as described by Goetsch et al and recommended by AAPM. The attenuation correction factors were determined to be 0.9903, 0.9928 and 0.9993 for {sup 192}Ir, {sup 60}Co and 250 kV x-ray, respectively. A wall + cap thickness of 0.421 g.cm{sup -2} is recommended for all measurements to ensure electronic equilibrium for {sup 60}Co and {sup 192}Ir gamma-ray beams. A mathematical formalism is described for determination of (N{sub x}){sub Ir}. (author). 5 refs, 1 fig.
Authors:
Marechal, M H; [1]  Almeida, C.E. de; [2]  Sibata, C H [3] 
  1. Instituto de Radioprotecao e Dozimetria, Rio de Jainero (Brazil)
  2. Laboratorio de Ciencias Radiologicas, UERL, Rio de Janeiro (Brazil)
  3. Roswell Park Cancer Inst., Buffalo, NY (United States)
Publication Date:
Aug 01, 1996
Product Type:
Technical Report
Report Number:
IAEA-TECDOC-896; CONF-940864-
Reference Number:
SCA: 070207; 550603; PA: AIX-28:018253; EDB-97:024703; SN: 97001735927
Resource Relation:
Conference: Interregional seminar on radiotherapy dosimetry: radiation dose in radiotherapy from prescription to delivery, Rio de Janeiro (Brazil), 27-30 Aug 1994; Other Information: PBD: Aug 1996; Related Information: Is Part Of Radiation dose in radiotherapy from prescription to delivery; PB: 293 p.
Subject:
07 ISOTOPE AND RADIATION SOURCE TECHNOLOGY; 55 BIOLOGY AND MEDICINE, BASIC STUDIES; IRIDIUM 192; CALIBRATION; RADIATION SOURCES; RADIOTHERAPY; ATTENUATION; CALIBRATION STANDARDS; COBALT 60; CORRECTIONS; DOSE RATES; EXPERIMENTAL DATA; GAMMA RADIATION; GAMMA SOURCES; INTERPOLATION; IONIZATION CHAMBERS; MATHEMATICAL MODELS; MEASURING METHODS; X RADIATION
OSTI ID:
429958
Research Organizations:
International Atomic Energy Agency, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 1011-4289; Other: ON: DE97614216; TRN: XA9642861018253
Availability:
INIS; OSTI as DE97614216
Submitting Site:
INIS
Size:
pp. 203-206
Announcement Date:

Citation Formats

Marechal, M H, Almeida, C.E. de, and Sibata, C H. Calibration of {sup 192}Ir high dose rate brachytherapy sources. IAEA: N. p., 1996. Web.
Marechal, M H, Almeida, C.E. de, & Sibata, C H. Calibration of {sup 192}Ir high dose rate brachytherapy sources. IAEA.
Marechal, M H, Almeida, C.E. de, and Sibata, C H. 1996. "Calibration of {sup 192}Ir high dose rate brachytherapy sources." IAEA.
@misc{etde_429958,
title = {Calibration of {sup 192}Ir high dose rate brachytherapy sources}
author = {Marechal, M H, Almeida, C.E. de, and Sibata, C H}
abstractNote = {A method for calibration of high dose rate sources used in afterloading brachytherapy systems is described. The calibration for {sup 192}Ir is determined by interpolating {sup 60}Co gamma-rays and 250 kV x-rays calibration factors. All measurements were done using the same build up caps as described by Goetsch et al and recommended by AAPM. The attenuation correction factors were determined to be 0.9903, 0.9928 and 0.9993 for {sup 192}Ir, {sup 60}Co and 250 kV x-ray, respectively. A wall + cap thickness of 0.421 g.cm{sup -2} is recommended for all measurements to ensure electronic equilibrium for {sup 60}Co and {sup 192}Ir gamma-ray beams. A mathematical formalism is described for determination of (N{sub x}){sub Ir}. (author). 5 refs, 1 fig.}
place = {IAEA}
year = {1996}
month = {Aug}
}