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.
Marechal, M H;
[1]
Almeida, C.E. de;
[2]
Sibata, C H
[3]
- Instituto de Radioprotecao e Dozimetria, Rio de Jainero (Brazil)
- Laboratorio de Ciencias Radiologicas, UERL, Rio de Janeiro (Brazil)
- Roswell Park Cancer Inst., Buffalo, NY (United States)
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}
}
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}
}