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I Wayan Balik Sudarsana
Udayana University
Earth & Planetary Sciences Electrical & Electronics Engineering Environmental Science Materials Science & Nanotechnology Physics

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UJI KELAYAKAN PESAWAT SINAR-X TERHADAP PROYEKSI PA (POSTERO-ANTERIOR) DAN LAT (LATERAL) PADA TEKNIK PEMERIKSAAN FOTO THORAX Kadek Miniati; Gusti Ngurah Sutapa; I Wayan Balik Sudarsana
BULETIN FISIKA Vol 18 No 1 (2017): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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Abstract

Research has been conducted to determine feasibility test of the X-ray planePA and LAT projections on chest x-ray techniques. The study using a water phantom object as a substitute for patients with variations in interval distance ofthe 100-180 cm. Measurement of radiation dose X-rays performed five repetitions , measurable doses had be read on the device electrometer. Exposition factors to the PA projection using a tube voltage of 75 kV, current and time of 3,2 mAs, the irradiation field areaof (30 x 30) cm2.For the LAT projection tube voltage of 80 kV, current and time of 6,3 mAs, and the irradiation field area of (20 x 30) cm2. It the study of the radiation dose X-ray plane projection PA and LAT is optimal is below the limit value at the level of dosage guidelines BAPETEN No 08 of 2011. Obtained PA projections are below the value of 0,4 mGy while LAT projection is below the value of 1,5 mGy. The radiation dose X-rays plane using a variation of 100-180 cm distance is still below the dose limit values ??, thus meeting the objectives anssurance quality and quality control.
PENGARUH GRID RATI TERHADAP TINGKAT KEHITAMAN FILM DENGAN MENGGUNAKAN SINAR-X Yetti Herlina; I Gusti Agung Ayu Ratnawati; I Wayan Balik Sudarsana
BULETIN FISIKA Vol 16 No 1 (2015): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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Abstract

Radiography quality is radiography ability to provide clear information about the object being examined. One of the important things that punch in a radiography with respect to the quality of the radiography contrast. Radiography contrast is obtained by measuring the density with a densitometer. A good radiography can be viewed from various aspect, one of which is contrast, lack of radiation scattering that occurs is essential to obtain optimal contras, it can be obtained in several ways such as irradiation (collimation to taste) and the used of technict kV. Movie density level depends on the density of the material transmitted by, the density on the movie influenced in grid ratio. Density increases with increasing grid ratio. The larger the grid ratio used the greater the darknes of the movies. Measurement with uji t statistic paired where the hypothesis if the Pvalue (sig) ‹ ? (5%) then H0 is the rejected and if the Pvalue (sig) › ? (5%) then H0 is accepted and if the value thitung › ttabel then H0 is rejected and if the thitung ‹ ttabel then H0 ­is accepted so it can be inferrent grid ratio of the obtained significant results, so the larger the grid ratio comparison is used then the grid the greater the darkness of the movie.
Analisis Dosis Radiasi Pasien Pada Pemeriksaan CT Scan Menggunakan Aplikasi Si-INTAN Elshaday S.B Siregar; Gusti Ngurah Sutapa; I Wayan Balik Sudarsana
BULETIN FISIKA Vol 21 No 2 (2020): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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Abstract

CT scan is widely used to diagnose the inside of the human body, so supervision is needed to ensure the health and safety of workers, patients and the public. One surveillance that can be done is to analyze the radiation dose of the patient on CT scan with the application of Si-INTAN. Data processing of the results of CT scan of the head, thorax and abdomen for ages 0-4 years, 5-14 years and ? 15 years using the Si-INTAN application. From the results of the data processing, the highest DRL DLP value and CTDIVOL values were obtained, for CT scan heads were 1732,8 mGycm and 31,92 mGy, the CT scan of the thorax was 2450,78 mGycm and 19,36 mGy, and for CT Abdominal Scans were 3968,85 mGycm and 19,35 mGy.
Perbandingan Radiasi Kanker Serviks Pada Organ Bladder Dengan Radioterapi LINAC Energi 10 MV Menggunakan Teknik 3DCRT dan IMRT Di RSUP Sanglah Denpasar Yuli Asri; Gusti Ngurah Sutapa; I Wayan Balik Sudarsana; Rozi Irhas
BULETIN FISIKA Vol 24 No 2 (2023): BULETIN FISIKA August Edition
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2023.V24.i02.p05

Abstract

A study has been conducted on comparative analysis of cervical cancer radiation to the bladder organ with 10 MV energy LINAC (Linear Accelerator) radiotherapy using the 3DCRT (Three Dimension Conformal Radiotherapy) technique and the IMRT (Intensity Modulated Radiation Therapy) technique at Sanglah Hospital, Denpasar. The 3DCRT and IMRT techniques were compared by analyzing the values ??of the HI (Homogeneity Index), CI (Conformity Index) and radiation dose distribution in the OAR (Organ At Risk), namely the bladder. The data used are 30 cervical cancer patient data with 10 MV photon beam radiotherapy planning and a total radiation dose of 5000 cGy. In calculating the HI and CI values, the data used were radiation dose of 98%, 50%, 2% of target volume and 95% volume on PTV and the average dose on Bladder organs. The data was obtained from the DVH (Dose Volume Histogram) statistics contained in the TPS (Treatment Planning System). The results of the HI value of 0.0818 for the 3DCRT technique and 0.0899 for the IMRT technique with statistical test results obtained the Asimp.Sig (2-tailed) value of 0.056> 0.05 which means it is not significant, while for the results of the CI value of 0.9500 for the 3DCRT technique and 0.9499 for the IMRT technique with statistical test results obtained the Asimp.Sig (2-tailed) value of 0.970> 0.05 which means it is not significant, meanwhile the percentage of the average dose in the bladder organ obtained an average result from the 3DCRT and IMRT irradiation techniques, 96% and 88%, respectively, with statistical test results, the Asimp.Sig (2-tailed) value was 0.000 <0.05, which was significant. Cervical cancer radiation using the IMRT technique is better than the 3DCRT technique because the IMRT technique minimizes the absorbed dose in OAR, it can be seen from the percentage of the average dose in the bladder organ with the IMRT technique getting a smaller dose percentage.
Co-Authors Elshaday S.B Siregar Gusti Ngurah Sutapa I Gusti Agung Ayu Ratnawati Kadek Miniati Rozi Irhas Yetti Herlina Yuli Asri