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All Journal Buletin Udayana Mengabdi Jurnal Biologi Udayana Bumi Lestari BERKALA FISIKA BULETIN FISIKA Jurnal Keselamatan Radiasi dan Lingkungan Kappa Journal
Gusti Ngurah Sutapa
Program Studi Fisika, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Udayana
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology Physics Other

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Penentuan Nilai Work Level Month (WLM) Maksimum Pekerja Pada Ruangan Berbahan Gipsum Setiono, Made Budi; Sutapa, Ngurah; Sudarsan, I Wayan Balik
Kappa Journal Vol 3, No 1 (2019): KAPPA JOURNAL
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (332.842 KB) | DOI: 10.29408/kpj.v3i1.1530

Abstract

Research has been done to identify radioactive elements and determine  Work Level Month (WLM) values on workers in the sized room of 2m x 2m using gypsum material. Identification of radioactive elements in gipsum samples using Laser Induced Breakdown Spectroscopy (LIBS) methods and measurement of radiation dose in gypsum walls using surveymeter methods. Identification of radioactive elements to the LIBS method showed an element of Th, U, K were detected. The accumulated dose of radiation detected in the room using gypsum walls is (1,6993±0,0169) μSv and the accumulated dose of radiation detected in the room without gypsum walls is (0,5657±0,0292) μSv. WLM values from the room use a gypsum walls if workers work for 1 years is 0,9924 WLM, then it is still considered safe because it is still below the RR values that has been determined that is equal to 50 WLM.
Penentuan Dosis Paparan Radiasi Pesawat Sinar-X Pemeriksaan Thorax Berdasarkan Indeks Massa Tubuh (IMT) Aulia Nur Aisah; I Gusti Ngurah Sutapa; Nyoman Wendri
Kappa Journal Vol 5 No 2 (2021): Desember
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v5i2.4110

Abstract

Telah dilakukan penelitian yang bertujuan untuk mengetahui pengaruh dosis paparan dan indeks eksposi pada pemeriksaan thorax terhadap IMT pasien dewasa. Data peneltian yang digunakan pada saat pengamatan adalah berat dan tinggi badan pasien, faktor eksposi yang terdiri dari tegangan (kV), Arus (mA) dan waktu (s) serta nilai FFD pada saat pemeriksaan. Pengambilan data dengan menggunakan jenis pemeriksaan thorax Posterior-Anterior (PA). Rentang usia pasien yang digunakan saat penelitian sesuai dengan aturan DEPKES pada kategori dewasa yaitu 26-45 tahun. Pengujian pada data menggunakan uji-F dengan taraf signifikansi 0,05. Berdasarkan hasil pengujian data menggunakan uji-F diperoleh nilai signifikansi sebesar 0,000 dan nilai Fhitung sebesar 49,166 dengan nilai taraf signifikansi 0,05 dan nilai Ftabel sebesar 3,35. Dari hasil tersebut dinyatakan memenuhi kriteria pengujian dalam statistik dimana H1 diterima dan H0 ditolak, sehingga dapat disimpulkan bahwa terdapat pengaruh pada nilai dosis paparan dan nilai indeks ekposi terhadap Indeks Massa Tubuh (IMT) dimana nilai indeks eksposi berpengaruh terhadap hasil citra pesawat sinar-X pemeriksaan thorax.
Pengaruh Usia Terhadap Besarnya Dosis Serap Radiasi Sinar-X yang Diterima Pasien Pemeriksaan Toraks I Made Hendra Hadinata; I Gusti Ngurah Sutapa
Kappa Journal Vol 3 No 2 (2019): Desember
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v3i2.1620

Abstract

There’s been research aimed at finding out the effects of age on the large absorbed dose of X-ray radiation received by the patient’s thorax examination. The observation data used to figure out the absorbed dose received by the patient is exposure factor consisting of tube voltage (kV), current (A), time (s), and distance (m) of patient from radiation source. The age range of patient obtained in this research is from 17 years until 48 years old, then it’s grouped by the age category set by Depkes. From the observation data of exposure factor and patients age, further do the test   using Oneway Anova statistical method test, by taking a significance level of a 0,05. The results from Oneway Anova statistic test is obtained FCalculate value is 1,532 amd sig is 0,211 with FTable value is 2,70 and sig is 0,05 therefore based on test criteria in statistic the early hypothesis (H0) is accepted. Presumably that the age is not affect on the large absorbed dose X-ray radiation received by the patient thorax eximination of range 17 years until 48 years old.
Radioterapi Linac Energi 6 MV Terhadap Kanker Serviks Pada Organ Rektum Menggunakan Teknik 3DCRT dan IMRT Di RSUP Sanglah Denpasar Yohana Dian Savitri; Gusti Ngurah Sutapa; I Wayan Balik Sudarsana; Rozi Irhas
Kappa Journal Vol 6 No 1 (2022): Juni
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v6i1.4947

Abstract

Radioterapi kanker serviks pada pesawat Linac menggunakan berkas photon energi 6 MV dengan teknik 3 Dimension Conformal Radiotherapy (3DCRT) dan Intensity Modulation Radiation Therapy (IMRT). Perencanaan radioterapi pada tehnik 3DCRT dan IMRT  kemudian dibandingkan dengan menganalisis distribusi dosis atau planning target volume (PTV) coverage melalui Conformity Index (CI) dan Homogeneity Index (HI) serta Organ At Risk (OAR) dimana organ beresiko yang diperhatikan adalah rektum. Pada penelitian ini menggunakan 30 data pasien kanker servik di Instalasi Radioterapi RSUP Sanglah Denpasar dengan perencanaan menggunakan box system  pada teknik 3DCRT dan teknik IMRT dengan sudut rotasi 00, 900, 1800, dan 2700 dan dosis radiasi 5000 cGy. Perbandingan kedua teknik ini dilakukan dengan menganalisis kurva Dose Volume Histogram (DVH) pada PTV coverage yang terdapat pada komputer Treatment Planning System (TPS). Hasil penelitian ini menunjukan nilai rata-rata CI pada tehnik 3DCRT adalah 1,017542 sedangkan pada tehnik IMRT sebesar 1,019668, dengan uji mann whitney (Asymp.Sig =0,492). Demikian juga dengan nilai HI, dimana pada tehnik 3DCRT rata-ratanya adalah 0,089494 sedangkan pada tehnik IMRT sebesar 0,093126 denga uji mann whitney (Asymp.Sig = 0,487), kedua nilai CI dan HI tidak signifikan. Sedangkan persentase dosis rata-rata organ rektum pada kedua teknik penyinaran 3DCRT dan IMRT berturut-turut yaitu 96% dan 87% dengan hasil uji statistik diperoleh nilai Asimp.Sig = 0.000 yang berarti signifikan. Radioterapi kanker serviks dengan menggunakan teknik IMRT dapat meminimalisir dosis serap pada OAR (rektum).
Analisis Dosis Efektif pada Pemeriksaan Computer Tomography (CT) Scan Abdomen di RSU Bali Jimbaran Farah Sukmana; Gusti Ngurah Sutapa; I Gde Antha Asmawan; Rozy Irhaz
Kappa Journal Vol 6 No 2 (2022): Desember
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v6i2.6115

Abstract

Telah dilakukan analisis dosis efektif dalam pemeriksaan CT Scan abdomen di RSU Bali Jimbaran. Penelitian dilakukan dengan menggunakan data sekunder hasil pemeriksaan CT Scan abdomen seperti nilai CTDIVol, DLP, arus, tegangan dan panjang scan. Data dikelompokkan berdasarkan jenis kelamin yakni 25 orang pasien laki laki dan 25 orang pasien perempuan. Nilai dosis efektif didapatkan dari hasil kali nilai DLP dengan faktor konversi (k). Analisis dosis efektif dilakukan menggunakan nilai DRL standar peraturan Kepala Bapeten dan ICRP 102. Dari hasil perhitungan diperoleh dosis efektif pada pasien laki laki sebesar 5,8707±0,80 mSv sedangkan pada pasien perempuan sebesar 5,5261±1,08 mSv. Nilai-nilai dosis tersebut masih sesuai dengan standar yang ditetapkan oleh Bapeten dan ICRP sehingga pesawat CT Scan tersebut masih layak digunakan untuk pemeriksaan CT Scan abdomen
Estimasi Dosis Radiasi Sinar-X Terhadap Efek Herediter Pada Radiografi Konvensional Sylvia Ariska Susanti; Gusti Ngurah Sutapa; Maghfirottul Iffah
Kappa Journal Vol 6 No 2 (2022): Desember
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v6i2.6467

Abstract

A study has been carried out on the estimation of X-ray dose on hereditary effects on conventional radiography. The research was conducted at the Bali Academy of Radiodiagnostic and Radiotherapy Engineering using a Raysafe X-Ray Multimeter. Secondary data was obtained in the form of results of checking the output voltage (kV), exposure time (ms) and exposure (mGy). The data obtained are then grouped according to the voltage used. The data is used to calculate the Entrance Surface Dose (ESD) value, which is then used to find the value of the Hereditary effect on the examination of each organ. In this study, the lowest ESD value was found at the use of a voltage of 40 kV, namely 0.3737 mGy, while the highest ESD value was at the use of a voltage of 80 kV, which was 0.7328 mGy. Based on the calculation of hereditary effects for generation I has the highest probability compared to generation II, this is very dependent on the ability of cells after exposure to radiation. Cells in general can make natural repairs. The longer the time after exposure to radiation, the more cells have the opportunity to repair the effects of radiation. So the probability of the risk of hereditary effects in generation II will be smaller.
Analisis Pengaruh Field of View (FOV) Terhadap Kualitas Citra Pesawat CT Scan di RSU Bali Jimbaran Widya Karulina Imanda Muhamad; Gusti Ngurah Sutapa; I Gde Antha Asmawan; Rozi Irhas
Kappa Journal Vol 6 No 2 (2022): Desember
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v6i2.6116

Abstract

It has been investigated the effect of field of view (FOV) on image quality produced by a CT Scan using the noise uniformity method with a phantom head. The FOV variations used are 180, 200, 220, 240 and 260 mm. The exposure time current and tube voltage used are 220 mAs and 130 kV, while the scan length and slice thickness used were 40 mm and 3 mm. Analysis of the effect of FOV variation on noise uniformity is determined by the standard deviation value obtained when performing ROI. Based on the standard deviation value, which shows that FOV variation affects the noise uniformity value, where the large increase in FOV, the noise uniformity is getting smaller and the resulting image quality is getting better
Pengaruh Sinar Ultraviolet Terhadap Jamur Aspergillus Niger I Gusti Agung Ayu Ratnawati; I Ketut Putra; Ida Bagus Made Suryatika; Gusti Ngurah Sutapa; Ni Luh Putu Trisnawati
Kappa Journal Vol 7 No 1 (2023): April
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i1.12252

Abstract

Along with the development of science and technology, some researchers try to apply knowledge to several biological systems to obtain benefits that can be used. One of them is the use of ultraviolet light to kill the fungus Aspergillus niger. In addition, ultraviolet rays are also used in various fields of the drinking water industry, food, and also for sterilizing operating rooms in hospitals. A method used in this problem is the cork borer method. Data were obtained by measuring the diameter of the inhibition zone of the Aspergillus niger fungus. The results of this study were obtained at the intensity of 12.30 lux and at a distance of 15cm, within 15 minutes of irradiation time, the maximum death of the fungus Aspergillus niger was 40.74%.
Pengaruh Multi Leaf Collimator (MLC) Terhadap Besar Dosis Yang Diterima Bagian Kepala Pasien Kanker Otak Pascalia Agno Marina Huki; Gusti Ngurah Sutapa; I Wayan Balik Sudarsana
Kappa Journal Vol 7 No 1 (2023): April
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i1.6633

Abstract

Research has been conducted on the effect of Multi Leaf Collimator (MLC) on the dose received by the head of brain cancer patients at Sanglah Hospital, Denpasar. This analysis aims to determine the effect of using MLC on dosing to brain cancer patients using Cobalt 60 (Co-60) teletheraphy. The dose given at TPS was 200 cGy but after using MLC the dose was received because MLC protects healthy organs around the irradiation field. If the dose given is still within the range of -5  % and +7  %, it is still acceptable. The amount of radiation dose that can be reduced by using MLC in this study was 1,35 % for brain cases and 0,12 % for Glioblastoma cases. 
Estimasi Dosis Serap dengan Metode Size Specific Dose Estimation (SSDE) dan Risiko Radiasi pada Pemeriksaan CT-Scan Kepala di Rumah Sakit Daerah Mangusada Kabupaten Badung Eka Saputra; Gusti Ngurah Sutapa; I Nyoman Paranditayana
Kappa Journal Vol 7 No 1 (2023): April
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i1.12985

Abstract

CT scan -Scan Those originating from X-rays on the head are very risky considering that the tissue in the brain has a greater sensitivity to ionizing radiation when compared to other organs in the human body. Problems will then arise when the use of CT-Scan sourced from X-rays can pose a radiation risk. Based on research conducted by Mathews et al. (2013) reported that at least 680,211 patients who had performed CT-Scan, 3,150 patients were diagnosed with cancer. There is a more accurate method in estimating the dose received by patients, namely using the SSDE. The dose estimation method using SSDE considers geometric factors (body size). The purpose of this study was to see how weight, gender, and age affect SSDE, using 80 patients classified into 4 age groups (children, adults, elderly, and seniors). The results showed that the average effective dose for children was 4.065 mSv for males and 3.706 mSv for females with a significant effect of weight, sex, and age on SSDE because theFCount as big4,640    FTableof 2.215
Co-Authors A. A. Ngurah Gunawan Aulia Nur Aisah Balik Sudarsana Choirul Anam AM Diponegoro Djarwani Soejoko Eka Saputra Elshaday S.B Siregar Farah Sukmana I Gde Antha Asmawan I Gde Antha Asmawan I Gde Antha Kasmawan I Gusti Agung Ayu Ratnawati I Gusti Agung Ngurah Ari Kusuma Putra I Ketut Putra I Komang Widiana I Made Hendra Hadinata I Made Yuliara I Nyoman Paranditayana I Nyoman Pranditayana I Wayan Balik Sudarsana I Wayan Balik Sudarsana I Wayan Balik Sudarsana I Wayan Balik Sudarsana I Wayan Balik Sudarsana I Wayan Balik Sudarsana I Wayan Putu Sutirta Yasa I. M. Yuliara I. M. Yuliara I.M. Yuliara Ida Ayu Putu Aristia Hutami Ida Bagus Alit Paramarta Ida Bagus Alit Paramartha Ida Bagus Made Suryatika Ida Bagus Made Suryatika Ida Bagus Putra Manuaba Kadek Miniati Kadek Sumaja Kadek Yuda Astina Komang Ngurah Suarbawa M. Zully Amrul Hadi Maghfirottul Iffah Mega Wahyu Muhammad Mada Ramadan Purnama N. L. P. Trisnawati Neviaty P Zamani Ni Kadek Ayu Asari Dewi Ni Kadek Nova Anggarani Ni Komang Tri Suandayani Ni Komang Tri Suandayani Ni Luh Putu Trisnawati Ni Luh Putu Trisnawati NI LUH WIDYASARI Ni Made Purmita Sari Ni Nyoman, Ratini Ni Putu Pande Anita Yulianti Ni Putu Winiayu Veramika Ni Wayan Ekayani Nurfaizah Nurfaizah Nyoman Wendri Pascalia Agno Marina Huki Poniman, S. Putu Gede Agus Krisna Yogantara Retianingsih Oeta Ulan Romadhon Ilham Imani Rozi Irhas Rozi Irhas Rozi Irhas Rozy Irhaz Sanjaya Natadiredja Setiono, Made Budi Suandayani, Ni Komang Tri Sudarsan, I Wayan Balik Sukarasa, I Ketut Sylvia Ariska Susanti Titik Purwanti Venesia Sesilia Br Ginting Wayan Balik Sudarsana Widya Karulina Imanda Muhamad Winardi Tjahyo Baskoro Yohana Dian Savitri Yuli Asri Yuliara, I Made