Karakterisasi Dosimetri Dari Bolus Karet Alam dan Komersial Menggunakan Radiasi Energi Elektron 6, 9 dan 12 MeV

Aisyah, Siti (2019) Karakterisasi Dosimetri Dari Bolus Karet Alam dan Komersial Menggunakan Radiasi Energi Elektron 6, 9 dan 12 MeV. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Bolus digunakan dalam dunia terapi radiasi eksternal sebagai “tissue substitute”. Pada studi ini material yang digunakan sebagai bolus adalah karet alam, play-doh dan lilin malam dimana ketiga bolus ini akan dibandingkan satu sama lain. Tujuan studi ini untuk memperoleh hasil densitas elektron, faktor transmisi, koefisien atenuasi massa, dosis permukaan, kurva percentage depth dose, kedalaman dosis maksimal sebagai parameter bolus yang layak. Uji densitas menggunakan CT Simulator dan treatment planning system dan untuk uji dosimetri menggunakan Linear Accelerator dengan sumber energi elektron 6, 9, 12 MeV ditambah variasi ketebalan bolus 0.5, 1, 1.5 cm. Hasilnya mengidentifikasikan bahwa densitas elektron relatif bolus karet alam sebesar (0.80, 0.84, 0.98) play-doh (0.91, 0.97, 1.14), lilin malam (0.79, 1.04, 1.12), nilai densitas ke-3 bolus masuk dalam rentang jaringan lunak yakni (paru, payudara, otot, hati) dan air. Berdasarkan hasil faktor transmisi dan koefisien atenuasi massa bolus karet alam memiliki sifat daya serap radiasi yang lebih kecil dibandingkan bolus komersial, untuk bolus komersial (play-doh dan lilin malam) memperlihatkan kemampuan daya serap yang semakin besar seiring bertambahnya ketebalan. Berdasarkan kurva percentage depth dose, bolus karet alam, play-doh dan lilin malam dapat meningkatkan dosis ke permukaan. Maka, dapat disimpulkan sintesis bolus karet alam dapat dijadikan alternatif “tissue substitute” pada kanker di area permukaan tubuh menggunakan energi elektron megavolt.
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Bolus has been used in external radiation therapy as a tissue substitute. In this study, bolus was synthesized using natural rubber, play-doh, and plasticine. The three boluses then will be compared to each other. This study aimed to evaluate the relative electron density bolus, transmission factor, mass attenuation coefficient, surface dose, percentage depth dose curve and the depth of dose maximum as a bolus parameter that is feasible to use. Relative electron density was measured and analyzed using CT Simulator and Treatment planning system. Meanwhile, dosimetry test was performed using LINAC with electron beam energy sources of 6, 9, 12 MeV. The results showed that the relative electron density for natural rubber bolus (0.80, 0.84, and 0.98) play-doh (0.91, 0.97, 1.14), and plasticine (0.79, 1.04, 1.12) has close to the value of soft tissues such as lung, breast, muscle, liver, and water. Moreover, the value of transmission factors and mass attenuation coefficient of natural rubber bolus have radiation absorption properties are smaller than those of commercial boluses whereas for commercial bolus (play-doh and plasticine) show greater absorption ability with increasing thickness. Based on the percentage depth dose curve, natural rubber, play-doh and plasticine bolus can be increased the percentage of surface dose. The fact indicates that the synthesized bolus of natural rubber has potentially can be used as an alternative “tissue substitute” for radiation therapy, especially for megavolt electron energy.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Bolus karet alam, densitas elektron, dosis permukaan.
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User:	St. Aisyah
Date Deposited:	17 Oct 2025 08:36
Last Modified:	17 Oct 2025 08:36
URI:	http://repository.its.ac.id/id/eprint/67363

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