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All Journal International Journal of Science and Engineering (IJSE) BERKALA FISIKA SAINS DAN MATEMATIKA Jurnal Ilmiah Aplikasi Isotop Radiasi YOUNGSTER PHYSICS JOURNAL Jurnal Riset Industri Hasil Hutan Journal of Physics and Its Applications JURNAL MAHASISWA BK AN-NUR : BERBEDA, BERMAKNA, MULIA Jurnal Ilmiah Padma Sri Kreshna Jurnal Abdimas Bina Bangsa Jurnal Ilmiah Agroust
Evi Setiawati
Departemen Fisika, Fakultas Sains Dan Matematika, Universitas Diponegoro, Semarang
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Journal : SAINS DAN MATEMATIKA

 1 
Gamma Spectroscopy Response Analysis of Bismuth Germanium Oxide (BGO) and NaI (Tl) Detector to Determine the Detector Efficiency using the Monte Carlo MCNPX Method Oktajianto, Hammam; Setiawati, Evi; Richardina, Verry
JURNAL SAINS DAN MATEMATIKA Volume 23 Issue 2 Year 2015
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

Simulation of Gamma spectroscopy with Bismuth Germinate Oxide (BGO) and NaI(Tl) detectors has been done using Monte Carlo method in MCNPX computer program. Simulation was conducted by modelling detector scintillator geometry, model of radiation source which was Cobalt-60 and pulse count model. BGO and NaI(Tl) had a diameter of 3 inch and thickness of 3 inch and closed by Aluminium with 0.05 cm thickness. Extended radiation source of Cobalt-60 was in radius of 0.15 cm which was put in front of detector surface with distance of 0.001 cm, 2 cm, 4 cm, and 12 cm. The simulation results showed that the less radiation count with increasing distance of the radiation source which was put in front of detector. Reduce of the radiation count lead to decrease efficiency in each increase of radiation source distance. The detector efficiency to count gamma ray radiation of BGO detectors was better than NaI(Tl) detector. The maximum efficiency of both detectors was occurred at distance of 0.001 cm in front of detector. These results also showed that MCNPX was able to agreeably simulate detector process to determine spectroscopy Gamma response.
Simulasi Pengaruh Kombinasi Target-Filter Tambahan Terhadap Spektrum Sinar-X pada Tabung Pesawat Mammografi dengan Program EGSnrc Budiwati, Trisna; Anam, Choirul; Setiawati, Evi
JURNAL SAINS DAN MATEMATIKA Volume 19 Issue 1 Year 2011
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

The mammography use the specific x-ray energy. At high x-ray energies (>35 keV) the subject contrast between the normal and malignant tissues in the breast is poor, at very low x-ray energies (10-15 keV) the contrast is highest, however the high absorption result in a high tissue dose. To achieve to good result must be used the optimal energy, that could be achieved by using specific x-ray target and additional filter materials to generate characteristic x-ray of the desired energy. This research was aimed to evaluate the influence of target-additional filter combination and filter thickness to the x-ray energy spectrum. The research was conducted by Monte Carlo simulation using EGSnrc program. The model of mammography tube was designed by BEAMnrc program, and phase space file was resulted by BEAMnrc was analyzed by BEAMDP. The tube x-ray contained of target and additional filter from molybdenum (Mo) and rhodium (Rh) material, window from berrylium, and collimator from Pb. Target-additional filter combination were Mo-Mo, Mo-Rh, Rh-Rh and Rh-Mo.  Variation of additional filter thickness that be used are 0,001 mm; 0,03 mm; and 0,05 mm. The results of the simulation indicated that an x-ray consist of bremmstrahlung and characteristic. X-ray spectrum were produced by Mo target had characteristic x-ray energy 17 keV and 19 keV, and Rh target had characteristic energy 20 keV and 23 keV. Target-additional filter combination that allowed are Mo-Mo, Mo-Rh, and Rh-Rh combination. Rh-Mo combination could not be used, because Mo filter would attenuated x-ray characteristic energy. For the Mo-Mo and Rh-Rh, the thicker the additional filter then the x-ray spectrum obtained has a more narrow, but the reduced intensity of the x-ray bremmstrahlung and characteristic.   Keywords: target-filter combination, x-ray spectrum, mammography, EGSnrc.
Penentuan Entrance Skin Exposure (ESE) pada Pesawat Mammografi Mammomat 1000 dengan Filter Molybdenum (Mo) dan Rhodium (Rh) Susanti, Fitri; Anam, Choirul; Setiawati, Evi
JURNAL SAINS DAN MATEMATIKA Volume 22 Issue 1 Year 2014
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

Mammography is a radiographic examination to detect breast cancer earlier. However, the usage of radiation with low kVp can cause high dose and this becomes the reason why monitoring the dosage during the mammography process is an important thing to do. One of the techniques to monitor the radiation level is done based on the Entrance Skin Exposure (ESE) value. This research was aimed to determine the ESE value using molybdenum (Mo) and rhodium (Rh) as the filter at Mammomat 1000 mammographics system.The research was started by measuring the consistency of the X-ray tube voltage (kVp ). After that, the ESE value at the target/filter Mo/Mo and Mo/Rh was measured using a Barracuda Multi Purpose Detector (MPD). The tube voltage during the research was 26, 28, and 30 kVp with fixed electrical current-time 100 mAs. The result shows that ESE value resulted at the target/filter Mo/Mo and Mo/Rh is tolerable, except at tube voltage 30 kVp with target/filter Mo/Mo. The comparison of ESE value shows that Mo/Rh has lower ESE value than Mo/Mo.   Keywords: Entrance Skin Exposure (ESE), mammography, Barracuda Multi Purpose Detector (MPD)    Pemeriksaan mammografi merupakan tindakan efektif dalam mendeteksi adanya kanker payudara sejak dini. Namun demikian, penggunaan teknik radiasi dengan kVp rendah pada mammografi dapat menyebabkan dosis tinggi. Oleh karena itu, pemantauan dosis pada pemeriksaan mammografi sangat penting dilakukan. Salah satu teknik pemantauan dosis radiasi dapat dilakukan dengan nilai Entrance Skin Exposure (ESE). Penelitian ini bertujuan untuk menentukan nilai ESE dengan filter molybdenum (Mo) dan rhodium (Rh) pada pesawat mammografi Mammomat 1000. Penelitian diawali dengan pengukuran konsistensi keluaran tegangan tabung sinar-X (kVp output). Selanjutnya dilakukan pengukuran nilai ESE pada target/filter Mo/Mo dan Mo/Rh dengan menggunakan Multi Purpose Detector (MPD) merek Barracuda. Tegangan tabung yang digunakan dalam penelitian yaitu 26, 28 dan 30 kVp dengan arus-waktu tabung tetap yaitu 100 mAs. Hasil penelitian menunjukan bahwa nilai ESE yang dihasilkan pada target/filter Mo/Mo dan Mo/Rh masih berada dalam batas toleransi yang direkomendasikan, kecuali pada pada tegangan tabung 30 kVp untuk Mo/Mo. Hasil perbandingan nilai ESE menunjukan bahwa Mo/Rh memiliki nilai ESE yang lebih rendah dibandingkan dengan Mo/Mo.   Kata kunci : Entrance Skin Exposure (ESE), mammografi, Multi Purpose Detector (MPD) Barracuda.
Co-Authors Agus Margiantoro Ahadiyah, Naeli Ni'matin Ana Aprilia Anak Agung Gede Sugianthara Ardiansyah, Mustofa Ariyanti Nur Anisa Asep Yoyo Wardaya Awwalin, Aufi Rizqiatul Binu Soesanto, Qidir Maulana Bunawas Bunawas Choirul Anam Choirul Anam AM Diponegoro Cicilia Artitin Cory Amelia Dessy Dian Monita Pardede Djoko Heru Pamungkas Dodi Junaedi Dortua Helena Sidabutar Eko Hidayanto Elvira Situmorang Erna Mariani Evi Handriani Bertua Simamora F Arianto Fajar Arianto Galih Puspa Saraswati Gede Sutresna Wijaya Gutji, Nelyahardi Hammam Oktajianto Hammam Oktajianto Handini Devi Yunitasari Harahap, Nur Hasanah Ifa Istighfaroh Indras Marhaendrajaya Intan Andriani Jatmiko Endro Suseno K Sofjan Firdausi K. Sofjan Firdausi Kusworo Adi Maria Theresia Darini Masdi Masdi Maulana, Alsa Putra Mochammad Facta Mohammad Afif Rachmatulloh Much. Azam Muchammad Azam, Muchammad Mursiyatun Mursiyatun Nanang Suriansyah Ngurah Ayu Ketut Umiati Nina GInanto Putri Nur Indah Lestari Nurul Laili Khoirut Tabi’atin Pandji Triadyaksa Poppy Intan Thahaja Rahmadi Setyawan Rahmaningtyas, Avivah Riana Anis Safitri Ridwan Eko Susanto Rinarto Subroto S Juliawan S. Suryono Sanggam Ramantisa Sanggam Ramantisan Sanggam Ramantisan Sari, Devi Artika Setiyono Setiyono Stefani, Eska Sudrajat, Ignasius Suprih Sumariyah M.Si Sumariyah Sumariyah Suroto Suroto Susilo Hadi, Susilo Suwardi Suwardi Syahria Syahria Trisna Budiwati Verry Richardina, Verry Very Richardina Very Richardina Wijianto Wijianto Windarta, Jaka Yunianta Yusup Hidayat Zaenal Arifin Zaenul Muhlisin Zainul Muhlisin