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All Journal Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) JFA (Jurnal Fisika dan Aplikasinya) Jurnal Standardisasi
Okky Agassy Firmansyah
Laboratorium Dosimetri Standar Sekunder Pusat Teknologi Keselamatan dan Metrologi Radiasi Badan Tenaga Nuklir Nasional Jakarta, Indonesia
Biochemistry, Genetics & Molecular Biology Economics, Econometrics & Finance Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Social Sciences Other

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ANALISIS PENENTUAN PDD BERKAS FOTON 6 DAN 10 MV FREE FLATTENING FILTER (FFF) PADA LAPANGAN KECIL MENGGUNAKAN TIGA DETEKTOR YANG BERBEDA Okky Agassy Firmansyah; Assef Firnando Firmansyah
Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) Vol 20, No 2 (2019): Agustus 2019
Publisher : BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (445.324 KB) | DOI: 10.17146/jstni.2019.20.2.5385

Abstract

ANALISIS PENENTUAN PDD BERKAS FOTON 6 DAN 10 MV FREE FLATTENING FILTER (FFF) PADA LAPANGAN KECIL MENGGUNAKAN TIGA DETEKTOR YANG BERBEDA. Analisis penentuan persentase dosis kedalaman untuk berkas foton 6 dan 10 MV flattening filter free (FFF) pada lapangan kecil menggunakan variasi detektor. Makalah ini menguraikan penentuan persentase dosis kedalaman dari berkas foton 6 dan 10 MV FFF yang dipancarkan pesawat pemercepat linier medik Versa HD. Pengukuran dilakukan menggunakan 3 jenis detektor yaitu IBA Razor dioda, PTW PinPoint 3D dan IBA CC13 yang dihubungkan dengan elektrometer IBA Dose 1.  Pengukuran  dilakukan di dalam fantom air Blue Fantom IBA yang dilengkapi dengan perangkat lunak MyQA Accept pada jarak sumber radiasi ke permukaan 100 cm dengan variasi lapangan radiasi 1 x 1 cm2, 2 x 2 cm2, 3 x 3 cm2 dan 4 x 4 cm2. Berdasarkan data yang didapatkan deviasi pengukuran antara detektor IBA Razor terhadap detektor PinPoint 3D didapatkan rentang deviasi 1.8% - 2.1%. Berbeda dengan deviasi pengukuran antara detektor IBA CC13 terhadap dektektor PinPoint 3D yang mendapatkan rentang deviasi 0,15% - 0,21%. Maka dapat disimpulkan bahwa pengukuran menggunakan tiga tipe detektor ini menunjukkan adanya kesesuaian dengan deviasi terbesar lebih kecil dari 3,5%. Detektor PinPoint 3D, Detektor IBA Razor, dan IBA CC13 dapat digunakan untuk melakukan pengukuran relatif pada lapangan kecil hingga 1 x 1 cm2 pesawat pemercepat linier medik.
Evaluation of Well-Type Chamber Calibration Factor for Measurement of Ir-192 Brachytherapy Source Over 10 Institutions Assef Firnando Firmansyah; Okky Agassy Firmansyah; Sri Inang Sunaryati; Nurman Rajagukguk
Jurnal Fisika dan Aplikasinya Vol 16, No 2 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i2.6406

Abstract

This paper describes about the evaluation of well-type chamber calibration factor for measurement Ir-192 brachytherapy source. Data were collected at ten institutions that have modalities of Ir-192 brachytherapy. The well-type chamber measures the Ir-192 brachytherapy sources in terms of air kerma strength. Calibration was carried out using the substitution method which adopted from a protocol published by the International Atomic Energy Agency. The well-type chamber standard used was HDR-1000 Plus. The results obtained that NAKS for well-type chamber from PTW manufacturers have a range of values from 9.063 x 105 – 9.875 x 105 Gy m2 h-1 A-1 with an average value 9.522 x 105 Gy m2 h-1 A-1, while the well-type chamber from Standard Imaging manufacturers have a range of values from 4.634 x 105 – 4.662 x 105 Gy m2 h-1 A-1 with an average value 4.648 x 105 Gy m2 h-1 A-1. The range of deviations obtained between NAKS new and NAKS old ranges from 0.8% to -1.8%, while the range of normalization results of NAKS new to the average value of NAKS new ranges from 0.952 - 1.029. There was one calibration factor that has a deviation of more than 1% over the NAKS old. Based on the calculation of uncertainty, all the calibration factor results obtained were still within the accepted range
BATAN PERSONAL DOSE EQUIVALENT Hp (10) AND Hp (3) INTERCOMPARISON RESULTS AT 2018 & 2019 Assef Firnando Firmansyah; Okky Agassy Firmansyah; Rizka Sarah Melinda
JURNAL STANDARDISASI Vol 23, No 2 (2021)
Publisher : Badan Standardisasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31153/js.v23i2.892

Abstract

One of the methods to ensure the quality of a laboratory is participating in an intercomparison activity. For the dosimetry laboratory network in Indonesia, the intercomparison activity is managed by the Secondary Standard Dosimetry Laboratory (SSDL) Jakarta. This paper describes the intercomparison among processing laboratory for personal dose equivalent Hp(10) and Hp(3) using thermoluminescent dosimeter (TLD)/films in 2018 & 2019. The SSDL Jakarta irradiated packages of participant's TLDs/films with Cs-137 and X-rays at a specific equivalent dose. The irradiated dosimeters were sent back to the participants by mail, and then the result was sent to the SSDL Jakarta for evaluation. The evaluation was carried out using the trumpet curve under the International Atomic Energy Agency (IAEA) publication. The results obtained for the 2018 intercomparison show the success rates of 98%, and 2% were outside the acceptable range, whereas for the 2019 Intercomparison, the success rates were 96% and 4% outside the acceptable range. The potential failure of reading the dose value was in the film dosimeter/badge. For those recent two years of intercomparison activities, the success rate was more than 95%. This result of the intercomparison activity showed the excellent quality of the personal dose equivalent Hp(10) and Hp(3) measurement in Indonesia.
Co-Authors Assef Firnando Firmansyah Assef Firnando Firmansyah Nurman Rajagukguk Rizka Sarah Melinda Sri Inang Sunaryati