Characteristics of Bolus Using Silicone Rubber with Silica Composites for Electron Beam Radiotherapy

Astuti, Santi Yuli; Sutanto, Heri; Hidayanto, Eko; Jaya, Gede Wiratma; Supratman, Astri Suppa; Saraswati, Galih Puspa

doi:10.14710/jpa.v1i1.3914

Cited by 11 publications

(4 citation statements)

References 5 publications

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“…This causes the electron beam fluence to increase due to the larger scattering angle (Podgorsak, 2005). This affects the build-up region that occurs not too deep after passing through the solid surface of the phantom, so that the ratio of the surface dose to the maximum dose becomes smaller at the use of low energy electrons (Astuti et al, 2018).…”

Section: Percentage Of Surface Dose (Psd)mentioning

confidence: 99%

Impact of In-House Bolus Thickness on The Percentage of Surface Dose for 10 and 12 MeV Electron Beams

Rismawati

Noor

Yueniwati

et al. 2022

jppipa, pendidikan ipa, fisika, biologi, kimia

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The surface dose on electron irradiation which is received by the skin does not reach 100%, so a bolus is needed as a compensator material in order to reach or approach 100%. This study aims to create, test, and describe the effect of different thicknesses of boluses that are made of 3D printed TPU, silicone sealant and resin on equivalence with tissue and the percentage of surface dose produced. A bolus with a size of 15x15 cm2 and with variations in thickness of 0.3 cm, 0.5 cm, and 1 cm was imaged by a CT-Scan to analyze the CT-Number value and relative electron density using imageJ software. After that, the bolus was irradiated by a Linac with an energy of 10 MeV and 12 MeV to measure the surface dose using an advances marcus detector. The result of this study showed that 3D printed TPU, silicone sealant and resin are similar to some soft tissues. Silicone sealant has the highest flexibility of the two boluses. In addition, silicone sealant also produces the highest increase in the percentage of surface dose in phantom.

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Section: Percentage Of Surface Dose (Psd)mentioning

confidence: 99%

Impact of In-House Bolus Thickness on The Percentage of Surface Dose for 10 and 12 MeV Electron Beams

Rismawati

Noor

Yueniwati

et al. 2022

jppipa, pendidikan ipa, fisika, biologi, kimia

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“…The function of the bolus is to ensure that the radiation dose has the correct value when it is received by the cancer cells [2]. Various bolus materials were selected which had properties such as elasticity, flexibility, safe for the skin, non-toxic, having the equivalent of soft tissue and being able to increase the surface dose [3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Determination of Effective Atomic Number and Radiation Mass Attenuation Coefficient of the Bolus from Alginate Impression Material

Guswantoro,

Hidayat,

Haryanto

et al. 2023

AMM

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Alginate impression material is a material that is commonly used to print dentures. This material is made from alginate. The properties of this material are rubbery, elastic, and not easily deformed so it can be applied as a bolus. This study aims to determine the tissue equivalence of this material by looking at aspects of the effective atomic number and radiation mass attenuation coefficient. To determine the effective atomic number, we used the EDX results from the SEM machine and input the concentration data of each element from alginate gel with 20% water content into the Autozeff software. The radiation mass attenuation coefficient is simulated by calculations involving each element’s concentration, then confirmed by CT-Number obtained from CT-Scan images. We obtained an effective atomic number and mass attenuation coefficient from the calculation results, which are described as a function of photon energy. Based on the results obtained, it can be concluded that the bolus made from alginate impression material is equivalent to soft tissue and breast tissue.

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“…The energy is capable of destroying the tissue it is exposed to, both normal and abnormal tissue. Giving the right dose plays an important role in shooting gamma radiation on target tissues such as tumors and cancer so that it will not damage surrounding healthy tissue (Astuti et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Comparison of Absorbed Dose in Plasticine Bolus and Silicone Rubber Bolus

Leony

Hanif

Defira

et al. 2022

J. Phys.: Theor. Appl.

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<p class="AbstractEnglish">Bolus is a radiotherapy device used to increase the surface dose in the skin surface area when using electron or photon beams. The most commonly used bolus is a bolus made from plasticine, in addition to a plasticine bolus there is also a bolus made from silicone rubber which is currently being developed. This study aims to determine which bolus is more effectively used in radiotherapy, by comparing the absorbed dose, the value of Relative Electron Density (RED), and the transmission factor of each bolus. In this study, silicone rubber and plasticine boluses were made with dimensions of 12 cm x 12 cm, the variation of energy used in LINAC was 9 MeV and 12 MeV and the thickness variation of each bolus was 0.5 cm, 1.0 cm, 1, 5 cm and 2.0 cm. The RED value obtained from the plasticine bolus for a thickness of 0.5 cm is 0.837 g/cm3, a thickness of 1.0 cm is 1.011 g/cm3, a thickness of 1.5 cm is 1.06 g/cm3, and a thickness of 2.0 cm of 1.072 g/cm3, while for silicone rubber bolus for a thickness of 0.5 cm is 1.146 g/cm3, a thickness of 1.0 cm is 1.151 g/cm3, a thickness of 1.5 cm is 1.17 g/cm3, and a thickness of 1.5 cm is 1.17 g/cm3 2.0 cm is 1.193 g/cm3. From the results of the study for the RED value of each bolus, it can be concluded that the silicone rubber bolus has a RED value that is more consistent with the water density value compared to the plasticine bolus. Silicone rubber and plasticine boluses can also be said to be absorbent materials because the transmission factor value of both boluses is below 100%. From the results of the study, silicone rubber boluses were more able to reduce the range of absorbed doses compared to plasticine boluses.</p>

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Characteristics of Bolus Using Silicone Rubber with Silica Composites for Electron Beam Radiotherapy

Cited by 11 publications

References 5 publications

Impact of In-House Bolus Thickness on The Percentage of Surface Dose for 10 and 12 MeV Electron Beams

Impact of In-House Bolus Thickness on The Percentage of Surface Dose for 10 and 12 MeV Electron Beams

Determination of Effective Atomic Number and Radiation Mass Attenuation Coefficient of the Bolus from Alginate Impression Material

Comparison of Absorbed Dose in Plasticine Bolus and Silicone Rubber Bolus

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