Evaluasi Kadar dan Distribusi Efek Radiasi di Chamber CT Scan Variasi Tempat Pengukuran

Ghuffran, Muhammad Anshar AL Farizy (2025) Evaluasi Kadar dan Distribusi Efek Radiasi di Chamber CT Scan Variasi Tempat Pengukuran. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini bertujuan untuk mengukur dan menganalisis tingkat radiasi latar di ruangCT scan rumah sakit X, serta mengevaluasi efektivitas shielding dalam mengurangi paparanradiasi. Pengukuran dilakukan di berbagai lokasi dalam ruang CT scan dan area sekitarnya,termasuk ruang kontrol, lorong, dan dinding pembatas. Data radiasi yang diperoleh kemudiandiolah menggunakan program Python dan toolsets Geant4 untuk menghasilkan simulasidistribusi dosis radiasi yang akurat. Hasil penelitian menunjukkan bahwa distribusi radiasidalam ruang CT scan tidak merata, dengan intensitas tertinggi ditemukan di wilayah yangberdekatan langsung dengan sumber radiasi. Simulasi juga menunjukkan variasi nilai dosispada berbagai titik yang relevan di dalam ruang. Pengukuran lapangan memperkuat hasilsimulasi, di mana nilai laju dosis tertinggi tercatat di area pintu masuk CT scan dan ruangoperator. Rata-rata laju dosis tertinggi mencapai 0,12 µSv/h dengan puncak mencapai 0,42µSv/h. Di sisi lain, beberapa area seperti koridor, ruang tunggu, dan taman mencatat laju dosisyang relatif rendah. Penelitian ini juga mengevaluasi efektivitas shielding radiasi pada beberapalokasi di sekitar fasilitas CT scan. Hasil pengukuran menunjukkan bahwa efektivitas shieldingdi semua lokasi berada pada rentang 94,7% hingga 96,9%. Meskipun tidak ada satu pun lokasiyang mencapai efektivitas 100%, seluruh nilai dosis radiasi yang terukur masih berada di bawahbatas maksimum yang ditetapkan oleh BAPETEN. Hal ini menandakan bahwa sistemperlindungan radiasi yang diterapkan sudah sangat efektif dalam menurunkan paparan radiasike lingkungan sekitar sehingga aman bagi pekerja maupun masyarakat umum sesuai denganstandar regulasi nasional. Secara keseluruhan, penelitian ini menunjukkan bahwa meskipunterdapat sedikit kebocoran radiasi akibat keterbatasan material atau desain shielding, tingkatpaparan tetap terkendali dan tidak melebihi ambang batas keselamatan yang berlaku. Penerapanprinsip ALARA perlu terus diperkuat dengan strategi optimasi teknis dan pemantauan berkalaoleh fisikawan medis, agar keselamatan pekerja medis dan masyarakat tetap terjaga.
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This study aims to measure and analyze background radiation levels in the CT scan roomof Hospital X and evaluate the effectiveness of shielding in reducing radiation exposure.Measurements were taken at various locations within the CT scan room and surrounding areas,including the control room, corridors, and partition walls. The radiation collected data was processed using Python and Geant4 toolsets to generate accurate simulations of radiation dosedistribution. The results show that radiation distribution within the CT scan room is uneven,with the highest intensity found in areas directly adjacent to the radiation source, the X-ray tube.The simulation also shows variations in dose values at various relevant points within the room.Field measurements reinforce the simulation results, with the highest dose rates recorded at theCT scan entrance and operator room. The average highest dose rate reached 0,12 µSv/h, with peaks up to 0,42 µSv/h. In contrast, some areas such as corridors, waiting rooms, and gardensrecorded relatively low dose rates. This study also evaluates the effectiveness of radiation shielding at several locations around the CT scan facility. Measurement results show that shielding effectiveness at all locations ranges from 94,7% to 96,9%. Although no locationachieved 100% effectiveness, all measured radiation dose values were still below the maximum limit set by BAPETEN. This indicates that the applied radiation protection system is very effective in reducing radiation exposure to the surrounding environment, making it safe forworkers and the general public according to national regulatory standards. Overall, this study shows that although there is some radiation leakage due to material limitations or shieldingdesign, exposure levels remain controlled and do not exceed applicable safety thresholds. Theapplication of the ALARA principle needs to be continuously strengthened with technicaloptimization strategies and regular monitoring by medical physicists to ensure the safety of medical workers and the public.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Radiasi Latar, CT scan, Shielding, Distribusi Dosis, Efektivitas Proteksi Radiasi, Background Radiation, CT scan, Shielding, Dose Distribution, Radiation Protection Effectiveness
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:	Muhammad Anshar Alfarizy Ghuffran
Date Deposited:	04 Aug 2025 02:31
Last Modified:	04 Aug 2025 02:31
URI:	http://repository.its.ac.id/id/eprint/124774

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