Shielding implications on secondary radiation doses in prostate cancer treatment

Medeiros, Marcos Paulo Cavaliere de; Silva, Ademir X.; Rebello, Wilson F.; Santos, Raphael F.G.; Stenders, Ricardo M.; Braz, Delson; Braga, Kelmo L.; Thalhofer, Jardel L.; Berdeguez, Mirta Bárbara Torres; Andrade, Edson R.

doi:10.1016/j.apradiso.2020.109163

Cited by 3 publications

(1 citation statement)

References 9 publications

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“…Shielding properties of different materials and compositions were also evaluated by attenuation and energy transmission measurements (Kase et al 2003, Facure and Silva 2007, Frota et al 2008, Cordeiro and Silva 2012. It is possible to register works evaluating the contributions of steel and lead used as shielding in bunkers (Medeiros et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Brazilian regulatory authority contribution to the shielding dimensioning model of radiotherapy rooms proposed by the NCRP 151

Braga¹,

Gomes²,

Terra³

et al. 2020

Biomed. Phys. Eng. Express

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The National Council on Radiation Protection and Measurements (NCRP) Report No. 151 is an essential document for bunker design commonly applied for radiotherapy treatment rooms. This document is used as a reference by several countries, including Brazil. The objective of this study is to evaluate the shielding dimensioning methodology recommended by NCRP 151, and compare it with the one adopted by the Brazilian regulatory authority. Radiotherapy rooms and respective doors were designed to use linear accelerators operating at 6, 10, 15, and 18 MeV under two different ways: (a) applying exclusively the methodology recommended by the NCRP 151, and (b) taking into consideration the complementary recommendations from the Brazilian authorities. The results suggest that designers in Brazil can count on at least 4 and 11% safety margin for dimensioning primary barriers in controlled and free areas respectively. Also 8% for secondary barriers in controlled areas, 9.7% for secondary barriers adjacent to the primary belt of free areas, and 6.6% for the lead of the doors.

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Section: Introductionmentioning

confidence: 99%

Brazilian regulatory authority contribution to the shielding dimensioning model of radiotherapy rooms proposed by the NCRP 151

Braga¹,

Gomes²,

Terra³

et al. 2020

Biomed. Phys. Eng. Express

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Influence of radiotherapy room shielding on ambient dose equivalent due to photons H(10)p and neutrons H(10)n in the patient’s plane

Mendes

Silva

Rebello

et al. 2022

Applied Radiation and Isotopes

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Clay and Cement Shielding Behavior from Gamma Sources

Eisa,

Ali,

Abualreish

2024

Eng. Technol. Appl. Sci. Res.

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Clay is a native building material in Sudan and is utilized by most low-income people. The radiation shielding characteristics of clay and cement were tested with a specific thickness to explore the behavior of gamma radiation through these materials. The results were compared and estimated by the Phy-X, XCOM, and Py-MLBUF software packages. Mass Attenuation Coefficient (MAC), Linear Attenuation Coefficient (LAC), Half-Value Layer (HVL), Tenth-Value Layer (TVL), Mean Free Path (MFP), and equivalent atomic number (Zeq), which describe the shielding properties of the examined materials, were all determined and compared. The comparison of calculations by software and experimental data of all selected samples showed a high degree of agreement, with discrepancies ranging between 0.01 and 5%. The experiments were carried out in a chamber close to 137Cs and 60Co sources at energies of 662, 1173, and 1332 keV.

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Shielding implications on secondary radiation doses in prostate cancer treatment

Cited by 3 publications

References 9 publications

Brazilian regulatory authority contribution to the shielding dimensioning model of radiotherapy rooms proposed by the NCRP 151

Brazilian regulatory authority contribution to the shielding dimensioning model of radiotherapy rooms proposed by the NCRP 151

Influence of radiotherapy room shielding on ambient dose equivalent due to photons H(10)p and neutrons H(10)n in the patient’s plane

Clay and Cement Shielding Behavior from Gamma Sources

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Shielding implications on secondary radiation doses in prostate cancer treatment

Cited by 3 publications

References 9 publications

Brazilian regulatory authority contribution to the shielding dimensioning model of radiotherapy rooms proposed by the NCRP 151

Brazilian regulatory authority contribution to the shielding dimensioning model of radiotherapy rooms proposed by the NCRP 151

Influence of radiotherapy room shielding on ambient dose equivalent due to photons H*(10)p and neutrons H*(10)n in the patient’s plane

Clay and Cement Shielding Behavior from Gamma Sources

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Product

Resources

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Influence of radiotherapy room shielding on ambient dose equivalent due to photons H(10)p and neutrons H(10)n in the patient’s plane