Ramadhani, Amanda Nur (2025) Uji Performa Bolus Cetak Tiga Dimensi untuk Terapi Radiasi dengan Berkas Foton 6 MV. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Bolus merupakan material tambahan dalam radioterapi yang berfungsi meningkatkan dosis permukaan dan mendistribusikan dosis secara optimal. Penelitian ini menganalisis beberapa jenis bolus lembaran berbahan dasar Silicone Rubber (SR), Silicone Rubber dengan Bismuth (SR+B), serta filamen 3D-Print PETG dan PLA. Evaluasi dilakukan berdasarkan keseragaman, uji celahudara, Relative Electron Density (RED), transmisi, atenuasi, dan Percentage Depth Dose (PDD). Pengujian mencakup pencitraanCT-Scan untuk mendapatkan nilai Hounsfield Unit (HU) yang dikonversi menjadi RED, serta pengukuran PDD dan atenuasi menggunakan water phantom dengan iradiasi berkas foton 6 MV dari LINAC. Hasil menunjukkan bahwa bolus 3D-Print PETG memiliki keseragaman terbaik dan bebas celah udara. Bolus SR menunjukkan koefisien atenuasi massa terbaik, sementara PLA memiliki faktor transmisi terendah. Semua bolus memiliki nilaiRED yang setara dengan jaringan tubuh manusia dengan 3D-PrintPETG setara jaringan lemak, SR+B setara dengan jaringanpayudara, serta 3D-Print PLA, SR, dan bolus komersial setara jaringan hati. Seluruh bolus berhasil meningkatkan dosis permukaan dan mendistribusikan dosis secara optimal, dengan performa terbaik ditunjukkan oleh 3D-Print PETG. Penelitian ini mendukung penggunaan material bolus alternatif yang efektif, klinis layak, serta ekonomis melalui teknologi 3D-Printing.
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Bolus is an additional material in radiotherapy that serves to increase surface dose and distribute the dose optimally. This study analyzes several types of sheet boluses made from Silicone Rubber (SR), Silicone Rubber with Bismuth (SR+B), and 3D-printed PETG and PLA filaments. Evaluation was conducted based on uniformity, air gap testing, Relative Electron Density (RED), transmission, attenuation, and Percentage Depth Dose (PDD). The testing included CT-Scan imaging to obtain Hounsfield Unit (HU) values converted into RED, as well as PDD and attenuation measurements using a water phantom with 6 MV photon beam irradiation from a LINAC. The results showed that the 3D-Print PETG bolus had the best uniformity and was free of air gaps. The SR bolus exhibited the best mass attenuation coefficient, while PLA had the lowest transmission factor. All boluses had RED values equivalent to human body tissues, with 3D-Print PETG equivalent to fat tissue, SR+B equivalent to breast tissue, and 3D-Print PLA, SR, and commercial boluses equivalent to liver tissue. All boluses successfully increased surface dose and optimally distributed dose, with the best performance demonstrated by 3D-Print PETG. This study supports the use of effective, clinically viable, and economical alternative bolus materials through 3D-Printing technology.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Bolus, Relative Electron Density (RED), Hounsfield Unit (HU), Percentage Depth Dose (PDD). |
| Subjects: | Q Science Q Science > QC Physics Q Science > QC Physics > QC795.5 Radioactivity and radioactive Instruments and apparatus (General) |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis |
| Depositing User: | Amanda Nur Ramadhani |
| Date Deposited: | 22 Jul 2025 07:32 |
| Last Modified: | 23 Jul 2025 01:34 |
| URI: | http://repository.its.ac.id/id/eprint/120574 |
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