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All Journal Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Jurnal Kimia (Journal of Chemistry) Buletin Udayana Mengabdi Bumi Lestari Ecotrophic, Journal of Environmental Science Kappa Journal International Journal of Engineering and Emerging Technology Jurnal Media Sains Jurnal Syntax Transformation
I Nengah Simpen
Program Studi Kimia FMIPA Universitas Udayana, Bukit Jimbaran, Bali
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Immunology & microbiology Law, Crime, Criminology & Criminal Justice Mechanical Engineering Medicine & Pharmacology Physics Social Sciences Other

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Journal : kappa journal

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Optimasi Slice Thickness dengan Nilai Signal to Noise Ratio dan Contrast to Noise Ratio untuk Meningkatkan Kualitas Citra MRI Genu Anastasia Victor, Agnes Maria Salvi; Sutapa, Gusti Ngurah; Gunawan, A. A. Ngurah; Sandi, I Nengah; Rupiasih, Ni Nyoman; Simpen, I Nengah
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.v9i1.29591

Abstract

Research has been conducted on the effect of slice thickness variation on the quality of Genu MRI images. This study was conducted at the Radiology Installation of Bali Mandara Hospital using primary data from Genu MRI examination results.The independent variable in this study is the variation of slice thickness values of 3, 5, and 7 mm. There were 30 patientsmeasured and the tissues analyzed were ligament, bone, fat, and noise as background using the ROI method and the segmentation results wereresults were taken at the mean value and standard deviation in the background. The difference in SNR and CNR values due to variations in slice thickness values can be tested using the Factorial Anova test. The results of this study obtained that there is an effect of slice thickness variation on SNR and CNR values that will have an impact on the quality of MRI Genu images. The greater the slice thickness value analyzed, the greater the SNR and CNR values produced and the better the image quality. In ligament tissue, the average SNR values of 3, 5 and 7 mm are 23.830; 36.594; and 50.524, respectively. In bone tissue, 191.352; 277.399, and 344.170 were obtained. In fat tissue, SNRs of 9,460, 292,022, and 367,463 were obtained. Changing the slice thickness will directly affect the SNR. It can be seen that the higher the slice thickness value given, the higher the SNR and CNR values for each tissue evaluated and the longer the scanning time required. In the slice thickness variation.
Radiation Dose Determination and Body Mass Index (BMI) Evaluation in Abdomen CT Scan Examination Patients Using the Size-Specific Dose Estimate (SSDE) Method Prawistya Putra, I Made Gede Mas; Sutapa, Gusti Ngurah; Kasmawan, I Gde Antha; Made Suryatika, Ida Bagus; Putra Adnyana, I Gusti Agung; Simpen, I Nengah
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.v9i1.29592

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.
Uji Posisi Sumur Bor Terhadap Akuifer Menggunakan Metode Audio Magnetotelluric (ADMT) Silalahi, Dio Carpry Gunawan; Simpen, I Nengah; Putra, I Ketut; Nurmalasari, Ni Putu Yuni; Suryatika, Ida Bagus Made; Kasmawan, I Gde Antha
Kappa Journal Vol 7 No 3 (2023): Desember
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i3.21468

Abstract

Research has been carried out regarding the position test of the drilled well against the aquifer at the Jimbaran Unud Campus on May 12, 2023. The borehole test was carried out using the Audio Magnetotelluric (ADMT) method. To ensure that the water needs of all students at Udayana are met, it is necessary to conduct research on drilled wells at Udayana whether they are suitable for aquifer positions (groundwater). The purpose of this study was to determine the suitability of the position of the drilled well to the aquifer in the ground behind the UNUD Rectorate Building. Based on the interpretation of the results of the research conducted in this paper, the aquifer position sought on line 1 is at a distance of 0–9 m and 21–50 m at a depth of 100–200 m below the ground surface, while on line 2 it is at a distance of 7–50 m at a depth of 100–140 m. Because the position of the Udayana drilled well is at 22.2 m on line 1 and 26.7 m on line 2 with a depth of 74 m, the Udayana drilled well is not yet in the aquifer position sought in this study.
Co-Authors A A I Rahma Prabawanti A.A. B. Putra Anak Agung Gde Raka Dalem Anastasia Victor, Agnes Maria Salvi Arsa Arsa D. A. D. N. Dewi D.M Priyantha Wedagama Dewik Setiyawati Dwi Adhi S, Ni Gusti Ayu Made Dwi Anggraeni Putri Suandi Ewa Satriawijaya Febby Hartesa W G M Arya Sasmita G.M.A. Sasmita Gunawan, A. A. Ngurah Gusti Ngurah Sutapa Hudi Nurwendi I Gde Antha Kasmawan I Gede Andy Andika Parahita I Ketut putra, I Ketut I M. S. Negara I M. S. Negara I M. S. Negara I M. Trimastiya I Made Dupi Andika I Made Sutha Negara I Made Sutha Negara I Made Wisnu Adhi Putra I Nengah Artawan I Nengah Sandi I Nyoman Aribudiman I Nyoman Sumerta Miwada I Nyoman Suprapta Winaya I NYOMAN SUTARPA SUTAMA I Nyoman Widana I W BUDIARSA SUYASA I Wayan Redana I Wayan Suarsa I Wayan Sudiarta I Wayan Suditayasa I. M. S. Negara I.A.G. Widihati I.A.G. Widihati I.M.S. Negara Ida Ayu Agung Pradnyani Ida Bagus Made Suryatika Ika Umratul IM.S. Negara Ketut Gede Dharma Putra Komang Yogi Purnamawati M. Arsa M. Indra Dwitama M. W. Prayani Made Indra Dwitama Made Suryatika, Ida Bagus Muhammad Nasib N. K. A. Oktapiani N. K. D. Astuti N.M. Puspa wati Nanik Ayumi Ni G. A. M. Dwi Adhi Suastuti Ni Ketut Suminten Ni Komang Tria Paramita Septiari Ni LUH ARPIWI Ni Luh Eka Anggarayanti Ni Luh Nyoman Kebayantini Ni Luh Putu Suciptawati Ni Made Puspawati Ni Made Widya Pratiwi Ni Nyoman Pujianiki Ni Nyoman Rupiasih Ni Putu Diantariani Ni Putu Gita Bonita Dewi Ni Putu Widya Tironika Dewi Ni Wayan Trisnadewi, Ni Wayan Nurmalasari, Ni Putu Yuni O. Ratnayani O. Ratnayani O. Ratnayani Oka Ratnayani Olivia Carolyn Sitepu Prawistya Putra, I Made Gede Mas Putra Adnyana, I Gusti Agung Putra, Anak Agung Bawa Putu Suarya R. Dalem S. R. Mustikawati Sihotang, Erikson Sihotang, I Nyoman Silalahi, Dio Carpry Gunawan Sitanggang, Katrin Walensky Siti Helmyati Siti Zulaikah Sri Rahayu Santi Tri Lestari, Komang Ayu W. A. Fauzi Y. N. Handayani Y. Ulfa