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All Journal Jurnal Kimia (Journal of Chemistry) Buletin Udayana Mengabdi Kappa Journal
Ida Bagus Made Suryatika
Program Studi Fisika, Fakultas Matematikadan Ilmu Pengetahuan Alam, Universitas Udayana, Jimbaran, Bali, 80361
Astronomy Chemistry Education Physics Other

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Measurement of Natural and Artificial Radiation as Well as Radiation Applications in The Field of Medical Physics at SMA Negeri II Kuta Badung Bali Gusti Ngurah Sutapa; I Gde Antha Kasmawan; Ida Bagus Made Suryatika; I Made Yuliara; Ni Nyoman Ratini; I Gusti Agung Ayu Ratnawati; Ni Luh Putu Trisnawati; I Ketut Putra; Ni Kadek Nova Anggarani
Kappa Journal Vol 8 No 3 (2024): Kappa Journal
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v8i3.28254

Abstract

The results of research that have been carried out, especially in the field of medical physics such as X-rays, have been widely utilized in the medical field, especially Radiology Units in Several General and Regional Hospitals. Thus, it is very important to be understood and known by the community, especially the community, in this case the students of SMA Negeri 2 Kuta. In 2022/2023, there are 507 male and 597 female students. Seeing these conditions, surveys and observations were carried out as a result, students had difficulty understanding physics because the physics subject matter was dense, memorized and mathematical. Seeing these results, it is necessary to carry out a new paradigm in physics learning. One of the more appropriate methods is to balance theory learning with field applications such as natural and artificial radiation measurements and applications in the field of medical physics. The results of natural radiation measurements in the classroom and outside the classroom were 0.605 ± 0.0024 and 0.182 ± 0.0008 mSv/year, respectively. The limit of the dosage rate allowed by BAPETEN is 1,000 mSv/year. Natural radiation identified in the classroom and outside the classroom is still declared safe
Analisis Peak Ground Accerelation (PGA) di Kabupaten Karangasem Menggunakan Pendekatan Empiris Siti Masitah; I Ketut Sukarasa; I Putu Dedy Pratama; I Made Yuliara; Ida Bagus Made Suryatika; I Gde Antha Kasmawan
Kappa Journal Vol 9 No 1 (2025): Kappa Journal
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v9i1.28647

Abstract

Kabupaten Karangasem merupakan bagian dari busur kepulauan Sunda Kecil yang terbentuk akibat proses subduksi lempeng Indo-Australia kebawah lempeng Eurasia sehingga menyebabkan daerah tersebut rawan bencana gempabumi. Penelitian ini bertujuan untuk menentukan nilai peak ground acceleration (PGA) di Kabupaten Karangasem menggunakan rumus empiris terpilih. Data yang digunakan adalah data skunder yang diperoleh dari alat accelerograph tahun 2019-2023 dan data dari katalog BMKG tahun 1972-2022. Dalam menentukan nilai PGA digunakan metode empiris Donovan (1973), Esteva (1970), Mc.Guirre (1963), Fukushima Tanaka (1990), Setiawan (2012). Pada hasil penelitian menunjukkan bahwa rumus empiris Donovan cocok untuk diterapkan di Kabupaten Karangasem. Kabupaten Karangasem bagian timur memiliki tingkat bahaya bencana gempabumi paling besar dengan skala Intensitas VI MMI mencakup Kecamatan Karangasem dan Kecamatan Abang dengan nilai PGA tertinggi yaitu 96 gals.
Analysis of Radiation Dose Received by Radiation Workers With Physical and Biological Dosimeters in The Radiology Unit of Sanjiwani Hospital Gde Ari Mas Janudinata; Gusti Ngurah Sutapa; I Gde Antha Kasmawan; Ida Bagus Made Suryatika; I Nengah Artawan; Ni Luh Putu Trisnawati
Kappa Journal Vol 9 No 1 (2025): Kappa Journal
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v9i1.29539

Abstract

This study aims to evaluate the impact of radiation exposure on the health of radiation workers at RSUD Sanjiwani Gianyar over the past five years. The evaluation was conducted through a physical approach, measuring radiation doses using Thermoluminescent Dosimeter (TLD), and a biological approach by analyzing the total leukocyte count and its components, namely neutrophils, lymphocytes, monocytes, and eosinophils. The results showed that the highest radiation dose was received by radiology specialists at 0.921 mSv, followed by medical physicists at 0.905 mSv, and radiographers at 0.894 mSv. This variation reflects differences in radiation exposure levels based on each profession's tasks and positions. Leukocyte and component analysis indicated that all values were within normal ranges. Although statistical tests showed significant differences in neutrophil levels between professions, overall radiation doses and leukocyte levels were within the safe limits set by PERKA BAPETEN No. 4 of 2013. The findings underline that radiation protection measures at RSUD Sanjiwani have been effective in minimizing health risks from radiation exposure. However, regular dose monitoring and health evaluations are necessary to ensure long-term protection for radiation workers.  
Analisis Variasi Gantry Terhadap Distribusi Dosis Radiasi Kanker Otak Dengan Teknik Intensity Modulated Radiation Therapy (IMRT) Ade Nisa Dali Sinaga; Gusti Ngurah Sutapa; Cory Amelia; Ida Bagus Made Suryatika; Made Yuliara; I Gde Antha Kasmawan; Rozi Irhas
Kappa Journal Vol 9 No 1 (2025): Kappa Journal
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v9i1.29557

Abstract

Penelitian mengenai Analisis Variasi Gantry Terhadap Distribusi Dosis Radiasi Kanker Otak Dengan Teknik Intensity Modulated Radiation Therapy (IMRT). dengan tujuan, untuk mengetahui pengaruh variasi jumlah sudut gantry terhadap distribusi dosis pada kasus kanker otak berdasarkan nilai HI,CI pada target kanker serta dosis maksimum pada organ at risk (OAR) menggunakan teknik IMRT. Penelitian dilakukan dengan variasi jumlah sudut gantry 4, 5 dan 6 dengan menggunakan 30 sampel. Kemudian dilakukan analisis data dengan menggunakan uji normalitas dengan uji t satu arah. Hasil penelitian menunjukkan bahwa, distribusi dosis pada PTV dengan nilai HI dan CI untuk variasi jumlah sudut 4,5 dan 6 arah sudut gantry adalah 0,118 dan 0,986; 0,116 dan 0,975; 0,108 dan 0,974. Sedangkan distribusi dosis maksimum OAR pada variasi 4,5 dan 6 arah sudut gantry untuk brainstem 4886,55; 4921,47; 4731,23; Eye R 2676,35; 2830,16; 3123,83; Eye L 3226,19; 3268,59; 3162,92; nervus optikus R 2396,23; 2775,52; 2796,94, nervus optikus L, 2939,97; 2983,12; 2912,47; lens R 789,76; 709,76; 717,32; lens L 738,31; 775,33; 724,02; chiasma, 4153,40; 4460,04; 4020,70. Berdasarkan nilai rata-rata tidak terdapat perbedaan antara nilai hasil perhitungan distribusi dosis dengan nilai ketetapan dosis maksimum dalam Radiation Oncology A Question-Based Review. Hasil penelitin ini menunjukkan bahwa perencanaan lapangan 4 arah sudut gantry memiliki hasil distribusi PTV yang lebih baik dan waktu penyinaran yang lebih siangkat dibandingkan dengan perencanaan 5 dan 6 variasi jumlah arah sudut gantry.
Analisis Distribusi Dosis Radiasi terhadap Perencanaan Radioterapi Menggunakan Metode Segmentasi Citra pada Kasus Tumor Otak dengan Teknik Intensity Modulated Radiation Therapy (IMRT) Izza Wahyu Saputri Saputri; Ida Bagus Made Suryatika; Cory Amelia; I Nengah Sandi; Made Sumadiyasa; I Gusti Agung Widagda; Rozi Irhas
Kappa Journal Vol 9 No 1 (2025): Kappa Journal
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v9i1.29562

Abstract

A study has been conducted on the effect of the number of segments on the radiation dose distribution of photon beams in brain tumor cases using the Intensity Modulated Radiation Therapy (IMRT) technique. This study used 20 primary data and 10 secondary data from brain tumor patients with 6 MV photon beams and a total dose of 6000 cGy. Calculations were performed by analyzing the Homogeneity Index (HI) and Conformity Index (CI) values as well as the radiation dose to the Organs at Risk (OAR), followed by statistical testing. Based on the conducted research, the results showed that HI and CI values for 5, 10, and 15 segments were different. For example, the HI value for 5 segments was more homogeneous, approaching 0, and the CI value for 10 segments was closer to 1, which indicates a better match with the PTV shape. The average maximum dose distribution for OARs with 5 segments in the brainstem, chiasma, left eye, right eye, left lens, and right lens were 4541.9 cGy, 3893.8 cGy, 2754.2 cGy, 2516.1 cGy, 740.8 cGy, and 628.0 cGy, respectively. With 10 segments, the doses for these OARs were 4104.2 cGy, 3633.9 cGy, 2583.9 cGy, 3124.2 cGy, 710.5 cGy, and 625.5 cGy, respectively. With 15 segments, the doses for the same OARs were 4123.0 cGy, 3956.2 cGy, 2753.3 cGy, 2433.7 cGy, 667.7 cGy, and 547.8 cGy, respectively. All maximum dose distributions for the OARs received by the patients were still within the tolerance limits stated in the Radiation Oncology A Question-Based Review 2nd Edition.
Radiation Dose Determination and Body Mass Index (BMI) Evaluation in Abdomen CT Scan Examination Patients Using the Size-Specific Dose Estimate (SSDE) Method I Made Gede Mas Prawistya Putra; Gusti Ngurah Sutapa; I Gde Antha Kasmawan; Ida Bagus Made Suryatika; I Gusti Agung Putra Adnyana; I Nengah Simpen
Kappa Journal Vol 9 No 1 (2025): Kappa Journal
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v9i1.29592

Abstract

A study has been conducted on determining radiation doses and evaluating body mass index (BMI) in patients undergoing CT-Scan Abdomen examinations using the Size Specific Dose Estimate Method at the Bali Mandara Radiology Installation. One of the factors that influences the radiation dose received by patients is the Body Mass Index (BMI). The Size Specific Dose Estimate (SSDE) method is used to assess radiation doses based on patient size, which is often associated with BMI. This study aims to determine the estimated radiation dose of each patient and evaluate the relationship between BMI and the dose received. This study used a CT-Scan brand SIEMENS SOMATOM PERSPECTIVE (serial number 78068). The population in this study were patients undergoing CT-Scan Abdomen examinations. The sample consisted of several BMI categories, namely thin, normal, overweight, and obese. The analysis was carried out using linear regression to measure the relationship between BMI and SSDE, as well as a one-way t-test to see the difference in the average SSDE value in each BMI category. The results showed that each increase in one BMI category caused an increase in SSDE values ​​of 1,566 mGy. The R² value of 98.56% indicated that the BMI category explained almost all of the variability in SSDE values. However, a one-way t-test statistic showed that there was no significant difference in the average SSDE values ​​in the thin, normal, overweight, and obese categories (F count <F table, so H₀ was accepted). This study showed that patients with higher BMI tended to receive higher radiation doses, but the differences between categories were not statistically significant.
Co-Authors A.A. Ngurah Gunawan Ade Nisa Dali Sinaga Adnyana, I Gusti Agung Putra Anak Agung Intan Rahmasari Asni Mulyati Jeni Ayu Ratnawati, I Gusti Agung Cory Amelia Cory Amelia Gde Ari Mas Janudinata Gusti Ngurah Sutapa Gusti Ngurah Sutapa Helena Idah I G. A. Widagda I Gde Antha Kasmawan I Gusti Agung Ayu Ratnawati I Ketut Putra I Ketut putra, I Ketut I M. S. Wibawa I Made Gede Mas Prawistya Putra I Made Sutha Negara I Nengah Artawan I Nengah Sandi I Nengah Simpen I Nyoman Sumerta Miwada I Putu Dedy Pratama I Wayan Balik Sudarsana I Wayan Putu Sutirta Yasa I Wayan Suarya I Wayan Supardi I.D.M.B.A. Darmawan I.K.A. Mogi I.W. Sumarjaya Ida Bagus Alit Paramarta Ida Bagus Putra Manuaba Irhas, Rozi Izza Wahyu Saputri Saputri Karel Yesaya Mbaba Lailatul Nuzzulul Safitri Made Sumadiyasa Made Yuliara Ni Kadek Nova Anggarani Ni Luh Putu Trisnawati Ni Nyoman Rupiasih Ni Nyoman, Ratini Nurmalasari, Ni Putu Yuni Nyoman Wendri Nyoman Wendri Oktar Mahardika, I Gusi Putu Gede Poniman, S. Poppy Intan Tjahaja R. Dalem Rio Saputra Rozi Irhas Rozi Irhas Selvi Marcellia Shatriani Wulandary Sipul Silalahi, Dio Carpry Gunawan Siti Masitah Sukarasa, I Ketut Trisnawati, Ni Luh Putu Wayan Balik Sudarsana Yuliara, I Made