Abstract
Background: We measured and assessed ways to reduce the secondary neutron dose from a system for proton eye treatment.Methods: Proton beams of 60.30 MeV were delivered through an eye-treatment snout in passive scattering mode. Allyl diglycol carbonate (CR-39) etch detectors were used to measure the neutron dose in the external field at 0.00, 1.64, and 6.00 cm depths in a water phantom. Secondary neutron doses were measured and compared between those with and without a high-hydrogen-boron-containing block. In addition, the neutron energy and vertices distribution were obtained by using a Geant4 Monte Carlo simulation.Results: The ratio of the maximum neutron dose equivalent to the proton absorbed dose (H(10)/D) at 2.00 cm from the beam field edge was 8.79 ± 1.28 mSv/Gy. The ratio of the neutron dose equivalent to the proton absorbed dose with and without a high hydrogen-boron containing block was 0.63 ± 0.06 to 1.15 ± 0.13 mSv/Gy at 2.00 cm from the edge of the field at depths of 0.00, 1.64, and 6.00 cm.Conclusions: We found that the out-of-field secondary neutron dose in proton eye treatment with an eye snout is relatively small, and it can be further reduced by installing a borated neutron absorbing material.
| Original language | English |
|---|---|
| Article number | 182 |
| Journal | Radiation Oncology |
| Volume | 8 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2013 Jul 17 |
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Keywords
- Boron
- CR-39
- Eye
- Neutron
- Proton
- Secondary
ASJC Scopus subject areas
- Oncology
- Radiology Nuclear Medicine and imaging
Cite this
Secondary neutron dose measurement for proton eye treatment using an eye snout with a borated neutron absorber. / Kim, Dong Wook; Chung, Weon Kuu; Shin, Jungwook; Lim, Young Kyung; Shin, Dongho; Lee, Se Byeong; Yoon, Myonggeun; Park, Sung Yong; Shin, Dong Oh; Cho, Jung Keun.
In: Radiation Oncology, Vol. 8, No. 1, 182, 17.07.2013.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Secondary neutron dose measurement for proton eye treatment using an eye snout with a borated neutron absorber
AU - Kim, Dong Wook
AU - Chung, Weon Kuu
AU - Shin, Jungwook
AU - Lim, Young Kyung
AU - Shin, Dongho
AU - Lee, Se Byeong
AU - Yoon, Myonggeun
AU - Park, Sung Yong
AU - Shin, Dong Oh
AU - Cho, Jung Keun
PY - 2013/7/17
Y1 - 2013/7/17
N2 - Background: We measured and assessed ways to reduce the secondary neutron dose from a system for proton eye treatment.Methods: Proton beams of 60.30 MeV were delivered through an eye-treatment snout in passive scattering mode. Allyl diglycol carbonate (CR-39) etch detectors were used to measure the neutron dose in the external field at 0.00, 1.64, and 6.00 cm depths in a water phantom. Secondary neutron doses were measured and compared between those with and without a high-hydrogen-boron-containing block. In addition, the neutron energy and vertices distribution were obtained by using a Geant4 Monte Carlo simulation.Results: The ratio of the maximum neutron dose equivalent to the proton absorbed dose (H(10)/D) at 2.00 cm from the beam field edge was 8.79 ± 1.28 mSv/Gy. The ratio of the neutron dose equivalent to the proton absorbed dose with and without a high hydrogen-boron containing block was 0.63 ± 0.06 to 1.15 ± 0.13 mSv/Gy at 2.00 cm from the edge of the field at depths of 0.00, 1.64, and 6.00 cm.Conclusions: We found that the out-of-field secondary neutron dose in proton eye treatment with an eye snout is relatively small, and it can be further reduced by installing a borated neutron absorbing material.
AB - Background: We measured and assessed ways to reduce the secondary neutron dose from a system for proton eye treatment.Methods: Proton beams of 60.30 MeV were delivered through an eye-treatment snout in passive scattering mode. Allyl diglycol carbonate (CR-39) etch detectors were used to measure the neutron dose in the external field at 0.00, 1.64, and 6.00 cm depths in a water phantom. Secondary neutron doses were measured and compared between those with and without a high-hydrogen-boron-containing block. In addition, the neutron energy and vertices distribution were obtained by using a Geant4 Monte Carlo simulation.Results: The ratio of the maximum neutron dose equivalent to the proton absorbed dose (H(10)/D) at 2.00 cm from the beam field edge was 8.79 ± 1.28 mSv/Gy. The ratio of the neutron dose equivalent to the proton absorbed dose with and without a high hydrogen-boron containing block was 0.63 ± 0.06 to 1.15 ± 0.13 mSv/Gy at 2.00 cm from the edge of the field at depths of 0.00, 1.64, and 6.00 cm.Conclusions: We found that the out-of-field secondary neutron dose in proton eye treatment with an eye snout is relatively small, and it can be further reduced by installing a borated neutron absorbing material.
KW - Boron
KW - CR-39
KW - Eye
KW - Neutron
KW - Proton
KW - Secondary
UR - http://www.scopus.com/inward/record.url?scp=84880334170&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84880334170&partnerID=8YFLogxK
U2 - 10.1186/1748-717X-8-182
DO - 10.1186/1748-717X-8-182
M3 - Article
C2 - 23866307
AN - SCOPUS:84880334170
VL - 8
JO - Radiation Oncology
JF - Radiation Oncology
SN - 1748-717X
IS - 1
M1 - 182
ER -