Naulita, Mazaya Anantya (2025) Evaluasi dan Komparasi Indeks Dosis Tomografi Terkomputasi Toraks-Abdomen Pediatri menggunakan 3D Printed In-House Computed Tomography Dose Index (CTDI) Phantom. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penelitian ini bertujuan untuk mengevaluasi kelayakan bahan Polylactic Acid (PLA) sebagai alternatif pengganti Polymethyl Methacrylate (PMMA) sebagai fantom CT dose index (CTDI). Evaluasi dilakukan dengan membandingkan nilai Hounsfield Unit (HU) dan parameter CT dose index berupa CTDI100, CTDIw, CTDIvol, dan Dose Length Product (DLP) antara fantom PLA dan PMMA. Pengujian dilakukan pada tiga variasi tegangan tabung, yaitu 80, 120, dan 140 kVp. Hasil uji statistik terhadap nilai HU menggunakan independent samples t-test menunjukkan tidak terdapat perbedaan yang signifikan antara PLA dan PMMA (p > 0,05), yang mengindikasikan bahwa karakteristik radiologis keduanya mendekati. Sementara itu, hasil pengukuran menunjukkan bahwa sebagian besar nilai CTDI100 PLA memiliki deviasi di bawah 20% terhadap PMMA, meskipun terdapat satu titik dengan deviasi yang melebihi batas tersebut. Nilai CTDIw dan CTDIvol menunjukkan deviasi maksimum sebesar 11,26% pada tegangan 140 kVp, yang masih berada dalam batas toleransi BAPETEN (±20%). Nilai DLP pada seluruh variasi tegangan juga menunjukkan kesesuaian yang baik dengan nilai pada fantom PMMA. Secara keseluruhan, hasil penelitian ini menunjukkan bahwa PLA dapat digunakan sebagai bahan alternatif pengganti PMMA untuk pembuatan fantom CT dalam pengukuran dosis radiasi.
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This study aims to evaluate the feasibility of using Polylactic Acid (PLA) as an alternative material to Polymethyl Methacrylate (PMMA) for a Computed Tomography Dose Index (CTDI) phantom. The evaluation was conducted by comparing the Hounsfield Unit (HU) values and CT dose index parameters, including CTDI100, CTDIw, CTDIvol, and Dose Length Product (DLP), between PLA and PMMA phantoms. Measurements were performed at three tube voltage settings: 80, 120, and 140 kVp. Statistical analysis of the HU values using an independent samples t-test showed no significant difference between PLA and PMMA (p > 0.05), indicating similar radiological characteristics. Most CTDI₁₀₀ values for the PLA phantom deviated by less than 20% compared to PMMA, although one data point exceeded this threshold. The maximum deviation of CTDIw and CTDIvol was 11.26% at 140 kVp, which remains within BAPETEN’s acceptable tolerance limit (±20%). DLP values across all voltage settings also showed good agreement with those of the PMMA phantom. Overall, the results indicate that PLA can be used as a viable alternative to PMMA for CT phantom fabrication in radiation dose measurements.
Item Type: | Thesis (Other) |
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Uncontrolled Keywords: | Computed Tomography, Dose Index, CTDI, 3D Printed Phantom, Polylactic Acid, PMMA, Computed Tomography, Dose Index, CTDI, 3D Printed Phantom, Polylactic Acid, PMMA |
Subjects: | Q Science Q Science > QC Physics R Medicine > RC Internal medicine > RC78 Diagnosis, Radioscopic--Examinations, questions, etc. R Medicine > RJ Pediatrics |
Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis |
Depositing User: | Mazaya Anantya Naulita |
Date Deposited: | 04 Aug 2025 07:50 |
Last Modified: | 04 Aug 2025 07:50 |
URI: | http://repository.its.ac.id/id/eprint/126929 |
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