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All Journal Buletin Udayana Mengabdi Jurnal Biologi Udayana Bumi Lestari BERKALA FISIKA Jurnal Keselamatan Radiasi dan Lingkungan Jurnal Penelitian Pendidikan IPA (JPPIPA) Indonesian Physical Review 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 Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education 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
Determination of Critical Organ Effective Dose in Head CT Scan Examination at Bali Mandara Hospital Sutapa, Gusti Ngurah; Winer Johan Bora; I Gde Antha Kasmawan; Ni Kadek Nova Anggarani; I Ketut Putra; Ni Putu Yuni Nurmalasari
Kappa Journal Vol 9 No 1 (2025): April
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v9i1.28471

Abstract

The study aims to determine the effective dose to critical organs in head CT scans at RSUD Bali Mandara and analyse the difference in effective dose between male and female patients and compare it with BAPETEN's normal threshold. Secondary data including current, voltage, CTDIvol, and DLP were collected and grouped by gender. The effective dose was calculated by multiplying DLP by the conversion factor K and CTDIvol by the organ weight factor (WT). The mean effective dose of male patients was 4.35 ± 0.68 mGy, while that of female patients was 4.00 ± 0.53 mGy. The effective dose of critical organs for males was 0.642 mGy and for females 0.613 mGy, with higher doses for males. Statistical analysis using t-test shows the value of tcount < ttable, which indicates that the effective dose in head CT scan examination at RSUD Bali Mandara is still within normal limits according to the BAPETEN DRL standard Number: 1211/K/V/2021.
Uji Kesesuaian Generator Tabung Sinar-X dan Automatic Exposure Control (AEC) pada Mamografi Digital di RSD Mangusada Badung Silalahi, Johanes J.; Sutapa, Gusti Ngurah; Pranditayana, I Nyoman; Sandi, I Nengah; Kasmawan, I Gde Antha; Nurmalasari, Ni Putu Yuni
Kappa Journal Vol 8 No 2 (2024): Agustus
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v8i2.24341

Abstract

This study focuses on evaluating the quality and performance of the digital mammography system at Mangusada Badung Regional Hospital (RSD) in an effort to prevent and early detect breast cancer. With the prevalence and mortality rate of breast cancer continuing to increase, early detection is important. Digital mammography has an important role in this early detection. This study aims to evaluate the performance of digital mammography at Radiology Installation Mangusada Badung through a series of tests. generator and x-ray tube suitability test and automatic exposure control (AEC). The results showed conformity tests on voltage accuracy (maximum error 0.8%), linearity (CL 0.01), reproducibility (radiation output CV 0.001, peak voltage CV 0.003), emergency timer (stops at 0 mAs), tracking (% patient thickness % exposure index error 7.9%, voltage exposure index error 6%), AEC (voltage CV 0.000, current time CV 0.000), exposure time (large focus t 0.87 seconds, small focus t 1.21 seconds). The test results show that the digital mammography system meets the conformity test criteria in accordance with PERKA BAPETEN no. 2 of 2022. This provides confidence that the device meets the established quality standards. With this fulfillment, it is expected that the accuracy of diagnosis can be improved and the risk of errors in early detection of breast cancer can be reduced. Therefore, the digital mammography system at RSD Mangusada Badung is expected to be.
Analisis Laju Dosis Radiasi di Area Ruang CT_Scan di Instalasi Radiologi RSU Bali Mandara Prameswari, Else Putri Ayu; Sutapa, Gusti Ngurah; Ayu Ratnawati, I Gusti Agung; Ratini, Ni Nyoman; Artawan, I Nengah; Trisnawati, Ni Luh Putu
Kappa Journal Vol 8 No 2 (2024): Agustus
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v8i2.25211

Abstract

Research has been carried out on radiation dose rate analysis in the CT-SCAN area of the radiology room at RSU Mandara Bali. The data used in this research is quantitative data observed from the radiation rate from the CT-SCAN aircraft. This study aims to determine the radiation dose rate in the radiology area and its rationalization based on regulations regarding radiation NBD (dose limit values) that apply to occupational safety and health. The research data is the actual radiation dose rate determined from the dose rate and calibration factors. The results of data calculations show that the highest dose rates are respectively at T2, 30 cm, 50 cm and 100 cm (door) with values of 1.95, 0.94 and 0.05 μSv/year, while the lowest dose rates are respectively at T4, 30 cm, 50 cm and 100 cm (waiting room) with values of 0.08, 0.06 and 0.05 μSv/year. The research results show that the dose rate at each measurement point is still considered safe for radiation workers where the NBD received is still below 20 μSv/year, while the dose rate is classified as safe for the general public at measuring distances of 50 cm and 100 cm, where the NBD received is below 1 μSv/year assuming the community concerned acts as a patient or patient's family with an interest in the radiology room area.
Co-Authors A. A. Ngurah Gunawan Alit Paramarta, Ida Bagus Anandika Putra, I Made Raditya Anastasia Victor, Agnes Maria Salvi Arsana Karang, Ade Rama Ditya Artawan, I Nengah Aulia Nur Aisah Ayu Ratnawati, I Gusti Agung Balik Sudarsana Balik Sudarsana, I Wayan Baskoro, Winardi Tjahyo Br Ginting, Venesia Sesilia Choirul Anam AM Diponegoro Cory Amelia Dali Sinaga, Ade Nisa Dharma Negara, I Putu Surya Djarwani Soejoko Eka Saputra Elshaday S.B Siregar Farah Sukmana Gunawan, A. A. Ngurah Hanzani, Asril Hendra Setiawan Hery Suyanto Huki, Pascalia Agno Marina I G. A. Widagda I Gde Antha Asmawan I Gde Antha Asmawan I Gde Antha Kasmawan I Gusti Agung Ayu Ratnawati I Gusti Agung Ayu Ratnawati I Gusti Agung Ngurah Ari Kusuma Putra I Ketut Putra I Ketut putra, I Ketut I Made Hendra Hadinata I Made Yuliara I Made Yuliara I Nengah Sandi I Nengah Simpen I Nyoman Yosua 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 Wayan Suarya I Wayan Supardi I. M. Yuliara I. M. Yuliara I.M. Yuliara Ida Ayu Putu Aristia Hutami Ida Bagus Alit Paramarta Ida Bagus Alit Paramarta Ida Bagus Alit Paramartha Ida Bagus Made Suryatika Ida Bagus Made Suryatika Ida Bagus Putra Manuaba Ida Bagus Putu Priastana Bawa Ida Bagus Suryatika Irhas, Rozi Kadek Miniati Kadek Sumaja Kadek Yuda Astina Kasmawan, I. G. Antha Komang Ngurah Suarbawa M. Zully Amrul Hadi Made Sumadiyasa Made Suryatika, Ida Bagus Maghfirottul Iffah Marcellino, Nathaniel Mas Janudinata, Gde Ari Mberato, Anastasia Jessing Gamalita Mega Wahyu N. L. P. Trisnawati Nabilla Fatimah NEVIATY PUTRI ZAMANI Ni Kadek Ayu Asari Dewi Ni Kadek Nova Anggarani Ni Kadek Nova Anggarani Ni Komang Tri Suandayani Ni Komang Tri Suandayani Ni Luh Putu Trisnawati NI LUH WIDYASARI Ni Made Purmita Sari Ni Nyoman Rupiasih Ni Nyoman, Ratini Ni Putu Aprillia Artanti Phalosa Ni Putu Pande Anita Yulianti Ni Putu Winiayu Veramika Ni Putu Yuni Nurmalasari Ni Wayan Ekayani Nurfaizah Nurfaizah Nurmalasari, Ni Putu Yuni Nyoman Wendri Paramarta, I. B. Alit Paranditayana, I Nyoman Poniman, S. Prameswari, Else Putri Ayu Pramitha, Ni Luh Emy Pranditayana, I Nyoman Prawistya Putra, I Made Gede Mas Prayuda, I Made Ardi Putra Adnyana, I Gusti Agung Putu Gede Agus Krisna Yogantara Ramadan Purnama, Muhammad Mada Retianingsih Oeta Ulan Romadhon Ilham Imani Rozi Irhas Rozi Irhas Rozi Irhas Rozi Irhas Rozy Irhaz Sanjaya Natadiredja Sari, Kamelin Diah Satriya Wibawa, I Made Setiono, Made Budi Silalahi, Johanes J. Sintiya Biantari, I Dewa Ayu Suandayani, Ni Komang Tri Sudarsan, I Wayan Balik Sudarsana, I Wayan Balik Sudarsana, Wayan Balik Sukarasa, I Ketut Sylvia Ariska Susanti Titik Purwanti Tri Suandayani, Ni Komang Trisnawati, Ni Luh Putu Wayan Balik Sudarsana Wayan Balik Sudarsana Widiana, I Komang Widianingsih, Ni Kadek Indah Widya Karulina Imanda Muhamad Winardi Tjahyo Baskoro Winer Johan Bora Yohana Dian Savitri Yuli Asri Yuliara, I Made Yuliara, Made