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All Journal International Journal of Advances in Applied Sciences Reaktor BERKALA FISIKA SAINS DAN MATEMATIKA YOUNGSTER PHYSICS JOURNAL Edumatsains The Indonesian Biomedical Journal Journal of Physics and Its Applications Indonesian Journal of Electrical Engineering and Computer Science
Eko Hidayanto
Departemen Fisika, Fakultas Sains Dan Matematika Universitas Diponegoro Jl. Prof. Soedarto, SH, Tembalang, Semarang Telp./Fax. (024)74680822/(024) 74680822
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Earth & Planetary Sciences Education Energy Environmental Science Materials Science & Nanotechnology Mathematics Physics Public Health

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Journal : YOUNGSTER PHYSICS JOURNAL

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PENGARUH BLOK INDIVIDUAL BERBAHAN CERROBEND PADA DISTRIBUSI DOSIS SERAP BERKAS FOTON 6 MV LINEAR ACCELERATOR (LINAC) Afrio Rika. R; Eko Hidayanto; Zaenal Arifin; Sanggam Ramantisan
Youngster Physics Journal Vol 3, No 3 (2014): Youngster Physics Journal Juli 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Individual blocks were often used as accessories irradiation in radiotherapy to protect organs at risk (OR). Therefore, the study was examined distribution of absorbed dose on the phantom horizontal axis due to the effect of using individual blocks made of cerrobend with variations of individual blocks surface area  and variation form individual blocks divergent and non-divergent then determined whether exceeding the tolerance limit.The used of Irradiation technique was a Linear Accelerator (LINAC) with 6 MV photons at dmax of 1.5 cm with SSD 100 cm, wide field irradiation by 20 cm x 20 cm, with the considered organs protected by 10 cm x 10 cm. Individual block made of cerrobend was shaped divergent and non-divergent with variations of surface area projections by 9 cm x 9 cm, 9.5 cm x 9.5 cm and 10 cm x 10 cm.The use of divergent and non-divergent blocks at the Organ at Risk (OR) and irradiation target exceeded the tolerance limit of the absorbed dose was on the OR transmission dose over the maximum permitted limit of 5%, while the results obtained from the study ranged from 6,0% - 6.8%, on irradiation target results obtained ranged from 101.3% - 109.6% while the tolerance permitted by ICRU  (The International Commission on Radiation Units and Measurements) Report 62 was -5% and +7%. In the transition area doses below 50%, remained <50%. Moreover, the distribution dose on the divergent block was better than the non divergent.Keywords: Absorbed dose distribution, divergent block, non-divergent block, transmission dose, target dose, transition dose, cerrobend.
PENGARUH VARIASI FAKTOR EKSPOSI (TEGANGAN TABUNG DAN ARUS WAKTU) SERTA PITCH TERHADAP COMPUTED TOMOGRAPHY DOSE INDEX (CTDI) DI UDARA MENGGUNAKAN CT DOSE PROFILER Puput Khusnaiatul; Eko Hidayanto; Zaenal Arifin; Choirul Anam
Youngster Physics Journal Vol 3, No 4 (2014): Youngster Physics Journal Oktober 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

The measurements of CTDI have been done as the method used to measure of dose in CT scans. The Measurement method is CTDI air method. Measuremeans of CTDI air using the CT dose profiler was placed in the center of the gantry rotation using tube voltage variations (80 kVp, 100 kVp, 120 kVp and 140 kVp), current time variations (100 mAs, 200 mAs, 300 mAs and 370 mAs) and pitch variations (0,75, 1, 1,25 and 1,5). The results of measurements  tube voltage variations in 370 mAs, pitch 1 and collimation 5 mm were 28,8-105 mGy, current time variations in tube voltage120 kVp, pitch 1 and collimation 5 mm were 19,7-73 mGy and Pitch variation in tube voltage 120 kVp, effective current time 370 mAseff, and collimation 5 mm were 55,9-116 mGy. The measurement results showed that greater the tube voltage, current time and pitch are used then the resulting CTDI air gets greater. The smaller tube voltage, current time and pitch are used then the resulting CTDI air gets smaller. FWHM and  geometric effisiency value of tube voltage variation were 6,2-6,37 mm and 68,40%-71,30%, current time variation were 6,17-6,27 mm and 69,5%-72,5% and pitch variation were 6,19-6,51 mm and 69,2%-71,4%. FWHM values of the three variations were larger than the width of collimation because the penumbra effect and geometric effisiency values were still within tolerance limits of 55%-75%. Keywords: CT dose profiler, CTDI air, FWHM, geometric effisiency 
EFEKTIVITAS RADIACWASH SEBAGAI DEKONTAMINAN Tc99m DAN I131 PADA PERMUKAAN DAERAH KERJA KEDOKTERAN NUKLIR M Rizqi Aditya Rahman; Eko Hidayanto; Rini Shintawati
Youngster Physics Journal Vol 2, No 3 (2013): Youngster Physics Journal Juli 2013
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Telah dilakukan penelitian dengan radiacwash sebagai bahan dekontaminan dari tumpahan Tc99mdan I131 pada tiga permukaan daerah kerja yaitu keramik, kaca dan vinyl untuk mengetahui efektivitas bahan dekontaminan radiacwash dan mengetahui bahan permukaan daerah kerja yang penurunan laju kontaminasinya paling cepat.Sumber Tc99mdan I131diteteskan pada ketiga permukaan, kemudian radiacwash diteteskan pada permukaan tersebut. Proses dekontaminasi dilakukan dengan teknik penyapuan memakai tissue. Laju kontaminasi diukur dengan alat monitor kontaminasi permukaan.Sampai tahap proses dekontaminasi kesepuluh, kontaminasi Tc99m pada bahan permukaan keramik 221,10 cpm, 96,03 cpm pada kaca dan 1713,69 cpm pada vinyl. Sementara untuk kontaminan I131, pada permukaan keramik 52,14 cpm, 38,94 cpm pada kaca dan 335,94 cpm pada vinyl. Dari hasil penelitian didapatkan bahwa pembersih radioaktif radiacwash lebih efektif untuk mengurangi kontaminan I131pada semua sampel permukaan daerah kerja. Selain itu didapatkan bahwa permukaan daerah kerja yang paling cepat mengurangi laju kontaminasi zat radioaktif adalah permukaan kaca.Kata kunci :dekontaminasi, Tc99m, I131, radiacwash
Deposisi, karakterisasi sifat optik dan uji degradasi Db71 pada lapisan tipis Zno:Co konsentrasi tinggi Ahmad Pradana; Heri Sutanto; Eko Hidayanto
Youngster Physics Journal Vol 6, No 3 (2017): Youngster Physics Journal Juli 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

A thin layer of ZnO:Co was deposited on a glass substrate using a spray coating method with the addition of Co doping variations of 5%, 10%, 15%, 20% and 25%. The ZnO:Co thin film is further used to degrade the Direct Blue 71 dye solution under sunlight irradiation. ZnO:Co solution was synthesized by dissolving Zinc acetate dehydrate (ZnAc) into isopropanol and then added monoethanolamine (MEA) and cobalt nitrate at room temperature with concentration of ZnAc 0.3M and molar ratio of MEA and ZnAc of 1:1. Then the stirred solution used a magnetic stirrer at a temperature of 70oC for 30 minutes to obtain a clear and homogeneous gel. Gel ZnO:Co is placed on a spray hole and then sprayed on a heated glass substrate at 400oC. The optical properties of the ZnO:Co coating were characterized using UV-Vis spectroscopy. The results showed that the addition of Co doping on a thin layer of ZnO resulted in an increasingly high absorbance in the Co doping sample at a concentration of 15%. In addition, the greater concentration of Co will decrease the value of the energy band gap. The results of photodegradation test of Direct Blue 71 dye solution on ZnO:Co photocatalyst were able to degrade dye by 16% of entire samples .Keywords: Photocatalyst, Thin film ZnO:Co, Spray Coating, Direct Blue 71
ANALISIS KORELASI INDEKS BIAS DENGAN KONSENTRASI SUKROSA BEBERAPA JENIS MADU MENGGUNAKAN PORTABLE BRIX METER Putri Parmitasari; Eko Hidayanto
Youngster Physics Journal Vol 2, No 4 (2013): Youngster Physics Journal Oktober 2013
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Sucrose concentration of honey solution has been analized by using Portable Brix Meter to determine its refractive index using Abbe refractometer. The materials used are honey randu solution, honey pollen, honey flora, honey klengkeng, honey karet, honey rambutan, white honey royal jelly, and honey kapuk with a concentration of 10 % until 50 %. The meansurement of sucrose concentration was performed by droping a few of sample solution above the sample table in this equipment. The content of sucrose is displayed digitally with units brix (%).    The concentration of sucrose solution proportional to the refractive index. The increase of concentration of sucrose solution will increase the refractive index. Correlation between the concentration of sucrose solution with refractive index by the equation n = 0,001C + 1,334 (R2 = 0,9972), n = 0,001C + 1,354 (R2 = 0,9919), n = 0,0015C +1,334 (R2 = 0,9999), n = 0,002C + 1,333 (R2 = 0,9817), n = 0,0015C + 1,334 (R2 = 0,9819), n = 0,002C + 1,328 (R2 = 0,9969), n = 0,002C + 1,329 (R2 = 0,9936), n = 0,002C + 1,322 (R2 = 0,9830). Refractive index of sucrose solution can be determined from its concentration.Keywords : refractive index, concentration of sucrose, honey, portable brix meter
Analisis Pengaruh Dosis Radiasi Eksternal Akumulasi Dosis yang Diterima Petugas Radiasi di Ruang Penyinaran Radioterapi RSUP dr.Hasan Sadikin Bandung Budi Muhammad AR; Eko Hidayanto; Very Richardina
Youngster Physics Journal Vol 7, No 2 (2018): Youngster Physics Journal April 2018
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

In radiation utilization, the regulation should be applied to minimize radiation dose received by the officer in order not to exceed the provision of Dose Limit Value based on BAPETEN Regulation No. 4 of 2013 that the average of equivalent dose is ≤50 mSv/year and ≤20 mSv for five-year period. The purpose of this study was to analyze the external radiation dose received by each officer at Radiotherapy Installation RSUP dr.Hasan Sadikin Bandung based on the NBD that has been determined. The equivalent dose values were obtained from the Thermoluminisence Dosemeter (TLD) of each officer over a five-year period from 2012 to 2016 that had been read by using a TLD reader. Then the radiation exposure measured by using a surveymeter with a distance of 3 meters from each teleterapi aircraft with radioactive sources to predict the distance factor between officers and radiation sources. The results showed that teleterapi operators received the highest equivalent dose in a five-year period with a dose value of 0.206 mSv/year, then in 2013 the external radiation dose received by officers and medical physicists reached the highest value when compared to another officers, with the average value of equivalent dose was 0.085 mSv/year and 0.55 μSv/hour. If observed from the distance factor, in 2013 each officer tends to come near to the source of radiation at every working hour. All radiotherapy officers at RSUP dr.Hasan Sadikin Bandung from 2012 to 2016 received a safe radiation dose and not exceed the NBD determined by BAPETEN. Keywords: Dose Limit Value, External Radiation Dose, Equivalent Dose, Distance
PENGARUH BEBERAPA JENIS ELEKTRODA UNTUK MENENTUKAN PERPINDAHAN CESIUM-134 di DALAM TANAH MENGGUNAKAN METODE ELEKTROKINETIK Agus Joko Prasetyo; Eko Hidayanto; Zaenal Arifin
Youngster Physics Journal Vol 3, No 4 (2014): Youngster Physics Journal Oktober 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Require to be conducted by impure soil remidiasi to shuting-out of Cesium-134 into human being body with elekrokinetik for the purpose of determining transfer of Cesium-134 and influence of electrode type in soil. This research used by three electrode type that is copper, stainless steel, and graphite. Transfer of Cesium-134 contamination divide by three areas there are zone I (0-7,5 cm from anoda), zone II (7,5-22,5 cm from anode) and zona III (22,5-30 cm from anode). From result of transfer of Cesium-134 comntamination and transfer efficiency got one of the electrode type which the best to be used for the sweeping of Cesium-134 contamination. Result transfer of contamination Cesium-134 using three different electrode type have transfer which much the same to that is zone I  degradation of concentration, zone II unstable concentration and zone III increase of concentration. For the degradation of copper electrode type electrics current 20.80 mA, steel stainless 23.00 mA, and graphite 15,00 mA. While best electrode type this research is graphite with efficiency at zone III equal to 4,48%, 7,43%, and 9,09%. Keywords: Elektrokinetik, Cesium-134, copper, steel stainless, and graphite.
Pengaruh ketebalan dan kombinasi jenis filter terhadap nilai Entrance Skin Exposure (ESE) menggunakan factor eksposi pemeriksaan kepala Salimatul Litasova; Eko Hidayanto; Muchammad Azam
Youngster Physics Journal Vol 7, No 2 (2018): Youngster Physics Journal April 2018
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Research on the analysis of the effect of filter type variation and thickness on mobile X-ray machine against ESE value of head examination. The use of filters aims to eliminate the low-energy X-ray beam so as to minimize the dose. The experiment was conducted to determine the ESE value and the thickness of the beak (HVL) on the combination of type and thickness of the filter. Combination filter used was aluminum (Al) with copper (Cu), aluminum with zinc (Zn), aluminum with galvalum (AlZnSi), aluminum (Al)), copper (Cu) with galvalum (AlZnSi), copper (Cu) with zinc (Zn), stainless steel (SS) with galvalum (AlZnSi) and stainless steel (SS) with zinc (Zn) ). With variation of 70, 81 and 90 kV fixed-time line voltages 20 mAs, 100 cm SSD, and 10 x 10 cm irradiation field measured tube voltage and ESE with combination of type and thickness of the filter. The results showed that ESE value with head examination exposure factor using combination of 1-1,5 mm filter Al with Zn, and combination of 1.5 mm  filter Al with galvalum was at tolerance 0,348 - 0,522 mGy. While the exposure factor with combination of filter, Cu with Zn, Cu with galvalum, Cu with Al, SS with Al, SS with Zn and SS with galvalum with thickness of filter combination 1-2 mm under tolerance limit. So that can be used alternative materials other than filter Al can use combination of  filter SS with AlZnSi. Half-Value Layer (HVL) exposure factor 90 kV with an filter Al with galvalum, we can use a 0.52 mm filter on a 0.71 mm filter Al with Zn. Keywords: x-ray machine, ESE, filter, HVL
Analisis tingkat kontaminasi permukaan daerah kerja dan laju paparan radiasi pada Instalasi Kedokteran Nuklir Ukhti Lailun Nisa; Gani Gunawan; Zaenal Arifin; Eko Hidayanto
Youngster Physics Journal Vol 6, No 1 (2017): Youngster Physics Journal Januari 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

The surface contamination of the work area and the rate of radiation exposure at nuclear medicine installation have an effect to the safety workers and the society directly or indirectly. This study aims to analyze the level of surface contamination and the rate of radiation exposure on the nuclear medicine installation and to identify the activity of half time 99mTc and 131I. The used method is measuring the surface contamination of the work area caused by the use of radiopharmaceutical through the distance between the detector window and the 3 cm measured region. Meanwhile, the rate of radiation exposures is used to measure the sides of each room with a distance 1 meter in the area control and to measure the activity of radioisotope that is monitored once every an hour for 6.03 hours to 99mTc and every day for 8 days to 131I of the initial measurement and compares with the result calculation. The measurement result of the level of the surface contamination in various areas of all rooms is 0.000-5.272 Bq/cm2 and it is classified into low to medium level of contamination. The measurement result of the rate of radiation exposure in the control area is 0.022-1.404 µSv/h which is still classified under 10 µSv/h. So, it can be concluded that it is safe for workers and other patients. The use of radioisotope on the nuclear medicine installation in accordance with their needs and always consider to the principles of the radiation protection, therefore the level of contamination and the rate of radiation exposure is low. The result of the measurement and the calculation of the activity of 99mTc are decays into a half after 6.03 hours and the activity of 131I is decays a half after 8 days. Keywords: Radiation Protection, Contamination, The rate of Radiation Exposure Half Time Activity.
Desain dan realisasi alat pengukur kandungan kolesterol dalam darah non-invasive Indras Marhaendrajaya; Eko Hidayanto; Zaenal Arifin; Heri Sutanto
Youngster Physics Journal Vol 6, No 3 (2017): Youngster Physics Journal Juli 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Excess total blood cholesterol can lead to heart vessel disorders, stroke and the most fatal can result in death. While testing the cholesterol levels in the blood at this time still use the invasive technique that the patient's blood is taken by using a syringe. This is one of the obstacles / causes of some patients are reluctant to check blood cholesterol. One of the health technologies to detect blood cholesterol in non-invasive is by utilizing the absorption of near infrared ray (NIR) and laser. The change in the physical properties of the resistance shows the chemical content of different solutions. Preparation of non-invasive blood cholesterol gauge by utilizing oxymeter sensor capable of producing voltage changes in various liquid medium and Atmega 8535 microcontroller as a minimum system in controlling output value in digital data form. The system or equipment to be fabricated in this study is a non-invasive method (without injuring the patient's body while taking blood samples) to determine the blood cholesterol content by utilizing the physical properties of laser absorption or NIR sensors on various blood cholesterol levels. From the research results have been made series of sensor interfaces and serial data communications are displayed digitally. The test results show that the equipment made has shown good performance but still limited its performance test. The results of the research will be developed into a national program of providing cheap, non-invasive portable and movable health test kits. Keywords: Heart Disease, Blood Cholesterol, NIR, Laser, Microcontroller.
Co-Authors Abdul Rofiq Achmad Chalid Afif Afrio Rika. R Agus Joko Prasetyo Agus Romadhon Agus Subagio Ahmad Pradana Alfia Hanim Ali Khumaeni Ali, Mohd Hanafi Ana Aprilia Anugrah Rahma Ari Wiganti Ardian Handoko Ari Bawono P Ari Bawono Putranto Ariij Naufal Arisa Dwi Sakti Astri Suppa Supratman Bambang Haris Suhartono, Bambang Haris Budi Muhammad AR Candra Ancila Choirul Anam AM Diponegoro Diah Dwiana Lestari Duandini, Ega Elin Nuraini Elvira Rizqi Widyanti Erna Mariani Etika, Eva Anggun Evi Setiawati Galih Puspa Saraswati Galih Puspa Saraswati Gani Gunawan Gede Wiratma Jaya H Hadiyanto Hella Arofah Heri Sugito Heri Sutanto Hidayatullah Hidayatullah I. Istadi Idam Arif Iis Nurhasanah Indras Marhaendrajaya Insiano, Dewi A. Iva Nistiyanti Jhonwesly Manik Josepa ND Simanjuntak Jun Kawai K Sofjan Firdausi Lamtiyah Ikha Indriyana M Rizqi Aditya Rahman Mariatul Khiftiyah Maya, Annisa Tenri Miftahul Aziz Mohammad Haekal Muahamad Irsal Much. Azam Muchammad Azam, Muchammad Muhammad Irwanto Muhammad Nur Muharam Budi Laksono, Muharam Budi Mulatomo, Tunggul Drajat Naufal, Ariij Nur Paramita Nira Mulyono Nurul Hikmantiyah Nurulita, Syaphira Faza Pandji Triadyaksa Poppy Intan Tjahaja Poppy Intan Tjahaja Puput Khusnaiatul Putri Parmitasari Putu Sukmabuana Qalby, Luthfia Rafli Filano Rahmawati Hidayah Rini Shintawati Salimatul Litasova Sanggam Ramantisan Sanggam Ramantisan Sanggam Ramantisan Santi Yuli Astuti Singgih Wibowo Sri Murni Susila Wardaya, Susila Takashi Yamamoto Teruo Tanabe Tiffany Rahma Novestiana Tina Melinda Tri Windarti Ukhti Lailun Nisa Very Richardina Wahyu Setia Budi Wahyu Tri Cahyanto Yoyon Wahyono Yoyon Wahyono Zaenal Arifin