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All Journal MEDIA MEDIKA INDONESIANA BERKALA FISIKA SAINS DAN MATEMATIKA YOUNGSTER PHYSICS JOURNAL Jurnal Teknik Sipil dan Perencanaan Jurnal Fisika Unand Arsitektura : Jurnal Ilmiah Arsitektur dan Lingkungan Binaan Jurnal Arsitektur ARCADE Jurnal Arsir Journal of Physics and Its Applications Jurnal Penelitian dan Pengabdian Kepada Masyarakat UNSIQ Jurnal Arsitektur ZONASI Cendekia Journal of Pharmacy Physics Communication Jurnal Arsitektur ARCADE Jurnal Pengabdian Masyarakat Inovasi Indonesia
Wahyu Setia Budi
Department Of Physics, Faculty Of Science And Mathematics, Diponegoro University
Arts Astronomy Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Other

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Journal : BERKALA FISIKA

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Studi Kualitas Minyak Goreng Dengan Parameter Viskositas Dan Indeks Bias Sutiah, Sutiah; Firdausi, K. Sofjan; Setia Budi, Wahyu
BERKALA FISIKA Vol 11, No 2 (2008): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

The aim of this research to investigate the quality of palm oil through its viscosity and refractive index before and after used. Viscosimeter Ostwald is used to measure the viscosity and refractive method in prism is used to measure refractive index. The measurement was carried out in room temperature. The samples are fresh oil, and expired oil. Analysis of the quality of palm oil based on viscosity measurement and refractive index show that palm oil that had not been used is the highest value and the palm oil that twice used is the lowest value. Keyword: viscosity, quality of oil
Analisis Keseragaman Citra pada Pesawat Ultrasonografi (USG) Sudarsih, Kesawa; Setia Budi, Wahyu; Suryono, Suryono
BERKALA FISIKA 2014: Berkala Fisika Vol. 17 No. 1 Tahun 2014
Publisher : BERKALA FISIKA

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Abstract

The computer base system to determine uniformity of ultrasonography image quality has been developed at various attenuation(dB) and Time Gain Compensator (TGC).The equipment used in this study was 2-dimensional ultrasonic apparatus and multi-purpose multi-tissue phantom models 040GSE. Data collection was performed by scanning the phantom using a linear transducer with a frequency of 8 MHz. The mean and standard deviation of image density of it ROI calculated used computer base system then analyzed with trendline if the image density value in the range between mean and sd  it means image uniform. The result shows that the uniformity of the image is influenced the value of attenuation and TGC. This value increase proportional with increasing attenuation. For greater value of the TGC the uniformity tends downward. At 45-60 dB  obtained distribution image uniformity sd value is 0.20 and 0.28, and at minimum up to maximum TGC  obtained distribution image uniformity sd value is 0.33 and 0.48. This value can be used for quality assurance reference of USG equipment. Keyword : USG Equipment, Uniformity, Region of Interest, Digital Image Processing
STUDY OF ELECTROOPTICS BEHAVIOUR OF NAPHTHALENE AND ANTHRACENE Firdausi, K Sofjan; Khumaeni, Ali; Richardina, Very; Arianto, Fajar; Budi, Wahyu Setia
BERKALA FISIKA 2015: Berkala Fisika Vol. 18 No. 3 Tahun 2015
Publisher : BERKALA FISIKA

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Abstract

In this paper, we demonstrate electro-optics behaviour of naphthalene and anthracene using change of polarization of sample induced by external electric field. The source of light for polarization was 1 mW-he-ne Laser 633 nm. The induced external Electric field was produced by high DC voltage 0 – 7 kV. The samples were diluted in solutions-form using wash-benzene. The result shows that anthracene has higher polarizability than naphthalene, which is indicated by higher change of polarization in anthracene than naphthalene. The Assumption that potential difference is proportional to the distance between molecules is shown qualitatively by graphs of Van der Waals potential energy or force between molecules. In this case, anthracene has higher level Energy than naphthalene so that it can be used in visible excitation for environmental spectroscopy. Keywords: electro-optics, polarization, naphthalene, anthracene, Van der Waals potential energy 
PENENTUAN QUALITY CONTROL (QC) RESOLUSI SPASIAL PADA CITRA CT SCAN DENGAN METODE LINE SPREAD FUNCTION (LSF) DAN POINT SPREAD FUNCTION (PSF) MENGGUNAKAN PHANTOM AAPM CT PERFORMANCE Yusanti, Weirna; Budi, Wahyu Setia; Adi, Kusworo
BERKALA FISIKA 2014: Berkala Fisika Vol. 17 No. 2 Tahun 2014
Publisher : BERKALA FISIKA

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Abstract

Computed Tomography (CT scan) is one of the X-ray modalities used in radiodiagnostic, as result it needs to do Quality Control (QC). This study focused on the image quality test of CT Scan by considering the spatial resolution parameters and using calculation method of the digital image. The effect of exposure factors (voltage and electric current) was also on image quality. This study using multislice CT (MSCT) 128 slice and AAPM CT Performance Phantom. Phantom scanned with the variation of exposure factors (80, 100, 120 kV and 50, 100, 150, 200, 250, 300, 350, 400, 450, 500 mA). The determination of spatial resolution value derived from the value of Full Width at Half Maximum (FWHM) of the Line Spread Function (LSF) and Point Spread Function (PSF) graphics. Results shown that the higher voltage applied, the smaller value of FWHM which show better image quality. This method is able to detect spatial resolution up to the 5th level (hole diameter 0.75 mm), whereas it is only up to 3rd level (1.25 mm) visually. The image quality in this study has been compared with the rules of West Austr Compliance Testing Protocol 2006, and it is proved that the  image quality is still good, thus the CT Scanner is still feasible to  use. Key words: CT Scan, Spatial Resolution, Line Spread Function, Point Spread Function
PENGARUH ARUS TABUNG TERHADAP NOISE DAN KONTRAS CITRA PADA PESAWAT CT SCAN Riyanto, Slamet; Budi, Wahyu Setia; Anam, Choirul
BERKALA FISIKA Vol 22, No 3 (2019): Berkala Fisika Vol. 22 No. 3 Tahun 2019
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Abstract

This study aims to evaluate the effect of tube current on noise and low contrast resolution in CT scan images. Determination of the noise and the low contrast resolution was carried out using the built-in phantom of CT scan. To determine the noise, a phantom section consisting of homogeneous water (water filled phantom) was used, and to determine the low contrast resolution, a phantom section consisting of a polystyrene box was used. The images were taken in an axial mode, using a voltage of 120 kVp, rotation time of 2 seconds, beam collimation of 10x2.5 mm, and slice thickness of 7 mm. The tube current was varied from 80 mA to 200 mA. At each scanning, 3 (three) slices were taken. The results show that an increase of the tube current from 80 mA to 200 mA causes a decrease in THE noise, but does not affect TO the low contrast resolution. At the same low contrast resolution, an increase of the noise decreases object detectability.Keywords: tube current, image noise, low contras resolution, axial scanning, CT scan
STUDI SIFAT ELEKTROOPTIS PADA KACA AKUARIUM, KACA PREPARAT, DAN AKRILIK Nila Kusuma, Anis; Firdausi, K. Sofjan; Setia Budi, Wahyu
BERKALA FISIKA Vol 9, No 2 (2006): Berkala Fisika
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Abstract

The properties of electrooptics of transparency media such as aquarium glass, micro slides, and acrylic have been studied. To obtained the change of refractive index (Dn) of materials against external static electric field (E), the samples are placed in two parallel plates applied by potential different of  0 – 104 V. The maximum external field reached by this experiment is in order 106 V/m. The change of refractive index as function of E is measured by Michelson interferometer equipment. First, our results show that the refractive index decreases as E increases for all samples. Second, Dn varies slightly square to E, which is still the dominant of linear electrooptic coefficient. The graphs both of acrylic and slides are rather smooth, which indicates that the crystal structures are more regular than aquarium glass. Key Words: electrooptics, refractive index, static electric field
Pengaruh Teknik Tegangan Tinggi Terhadap Entrasce Skin Exposure( ESE ) dan Laju Paparan Radiasi Hambur Pada Pemeriksaan Abdomen Dhahryan, Dhahryan; Setia Budi, Wahyu; Azam, Much
BERKALA FISIKA Vol 11, No 3 (2008): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

The measurement for influence of high voltage technique to Entrance Skin Exposure and is Rate of Scattered Radiation Exposure on abdomen inspection has been conducted. The ESE measurement is conducted using Electrometer and is calculated by semi empirical method, while in measurement of rate of scattered radiation exposure using survey meter at a distance of 100 cm from the object by varying data intake points and its direction of detector. The result indicates that the usage of high voltage technique yields absorbent dose of 124 mrad and radiation exposure of 339 mR. It is lower than the standard value of absorbent dose of 322.7 mrad and radiation  exposure of 130,5 mR. The result of measurement is higher than calculation. In measurement of exposure of scattered radiation rate with detector position faced to object, on right side of cathode, it yields 1.03mR/hour with standard voltage and 0.32 mR/hour with high voltage technique. While in measuring  exposure of scattered radiation rate and back-scattered obtained result on A’ and C’ (close to anoda and side of object) and A” and C” nearly same, with highest value of 1 mR/hour and 0.93 mR/hour at standard tube voltage and at high kV technique obtained lower value of 0.29mR/hour and 0.25mR/hour.
PENGARUH RASIO GRID TERHADAP KUALITAS RADIOGRAF FANTOM KEPALA Priyono, Setyo; Anam, Choirul; Budi, Wahyu Setia
BERKALA FISIKA Vol 23, No 1 (2020): Berkala Fisika
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Abstract

This study aims to determine the effect of the grid ratio on the quality of the radiographic examination of a head phantom. The study was conducted by using grid ratios of 5:1, 6:1, and 8:1, the head phantom. The focus-film distance (FFD) was 100 cm. In the antero-posterior projection used voltages of 70, 75, and 80 kVp with a current-time of 25 mAs, while in the lateral projection using voltages of 65, 70 and 75 kVp with a current-time of 20 mAs. The densities of radiographs were measured using a densitometer. Measurement was repeated in 10 locations. The contrast of radiograph was calculated as the difference between adjacent density values. The results showed that the higher level of the grid ratio would lower the density of radiograph, however it does not always give effect to the increase or decrease the contrast of radiographs. It was found that the optimal quality radiographs in antero-posterior projection at a grid ratio of 6:1 for tube voltage of 75 kVp with a current-time of 25 mAs, and in the lateral projections at a grid ratio of 5:1 grid for tube voltage of 75 kVp with a currenttime of 20 mAs.
PENENTUAN AKUMULASI RADIOFARMAKA Tc99m MDP PADA SPINE DAN STERNUM SAAT PEMERIKSAAN BONE SCAN PASIEN KANKER PAYUDARA Arifah, Dwi Intan; Setiabudi, Wahyu
BERKALA FISIKA Vol 24, No 4 (2021): Berkala Fisika
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Abstract

Based on data from Indonesian Health Ministry, breast cancer is the type of cancer with the highest prevalence in Indonesia amounted to 0.5% in 2013. This study aims to determine the accumulation of  activity  Tc99m  Methylene  Diphosponate  (MDP)  on  the  bone  around  the  breast,  spine  and sternum. This study was conducted on 30 patients undergoing the bone scan using in vivo nuclear medicine technique. The study was conducted using Tc99m obtained from elution of Mo99 generator and mixed with MDP. Bone scan was performed by injecting Tc99m MDP intravenously into the patients arm as much 15.84 – 21.95 mCi. Furthermore, the anterior posterior planar imaging in whole of body at 4 hours after injection of the patient by using a gamma camera. Then, using region of interest (ROI), the accumulative of activity on bone can be measured. A range of values based on the activity of bone metastasis can be seen from the percentage uptake of lesions found on the spine  and  sternum.  Based  on  the  existence  of  lesions,  there  were  12  patients  had  lesions  in  the spine only, 9 patients had lesions in the sternum only, 7 patients had lesions on both of them and there are 16 patients who have not lesions in both.
UPAYA PENINGKATAN KUALITAS CITRA MRI DENGAN PEMBERIAN MEDIA KONTRAS Suhardi Suhardi; Wahyu Setiabudi; Choirul Anam
BERKALA FISIKA Vol 16, No 1 (2013): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Improvement the image quality of magnetic resonance imaging (MRI) carried out bycontrast media has been done. It was expected to obtain a better image quality so thatinterpretation of MRI images more valid. Contrast media were used gadolinium 5 mmol/10 ml perpatient. Number of patients 10 people with tumor of the head, and each uses a 6 slices. MRI usedAIRIS II with 0.3 Tesla magnetic field, Kodak Dry View 8900, densitometry, and Film. In thisstudy, the image resulted with and without contrast media were measured its density andcompared. It was resulted that the image density in normal  tissues no change, with and withoutcontrast media. While the tumor area with and without contrast media, the density decreased byan average of 0,56. The addition of contrast media, the presence of tumor will appear moreclearly.Keywords: Contrast Media, gadolinium, MRI
Co-Authors Ade Ika Susan Afgani, Jundi Jundullah Agung Dwiyanto Ahmad Mutohar Ainul Ibnu Khotob Alan Tanjung Aji Prastowo Alfian Rizani Ali Khumaeni Anis Nila Kusuma Anugrah Ariyani S. Arif Fahmi Arifah, Dwi Intan Asep Yoyo Wardaya Astrihasna Shafa Bambang Haris Suhartono, Bambang Haris Choirul Anam Choirul Anam AM Diponegoro Chorirul Anam Dewandaru, Ardian Dewantoro, Fajar Dewantoro, Fajar Dhahryan Dhahryan Dini Desita Dwi Siwi Retnoningsih Eddy Prianto Eko Hidayanto Erni Setyowati Fadil Nazir Fajar Arianto Fatkhiyatul Athiqoh G. B. Suparta Gagoek Hardiman Gagoek Hardiman Gani Gunawan Gani Gunawan Hamdani, Muhammad Alif Iza Handayani, Liska Tri Harianja, Bernard Hendrika Liana Sari Heri Sugito Heri Sutanto Hidayatullah, Aydymas Davansyah I Wayan Ari Makmur Ismail Ismail Istifadatun Ni’amah Juhroh, Aminatul Jundi Jundullah Afgani K Sofjan Firdausi K. Sofjan Firdausi Kaka, Susanti Radi Kesawa Sudarsih Ketut Sofjan Firdausi, Ketut Sofjan Khomilia, Crysant Ayu Sufi Kusminarto Kusminarto Kusminarto Kusminarto Kusminarto Kusminarto Kusworo Adi Liska Tri Handayani Maesadji Tjokro Nagoro Maesadji Tjokro Nagoro Maliki Maliki Maria Carizza Pandora Raharjo Masrokan Masrokan Masrokan, Masrokan Michelson Fahrurazi Much Azam Muhamad Adi Muharam Budi Laksono, Muharam Budi Nora Fajria Nur Dwi Prasetyo Pandora Raharjo, Maria Carizza Prasetyo Basuki Pratama, Arthana Setia Priyono, Setyo Purwanto Purwanto Rahmawati, Fatimah Dwi Rini Shintawati Rozanah Rozanah Rusmaharani, Diyah Sihotang, Pandapotan Sugiarto, Oki Suhardi Suhardi Sunarsih Sunarsih Supriyati Supriyati Suryono Suryono Susanti, Audry Nadifa Susila Wardaya, Susila Susilo Susilo Susilo Susilo Susilo Susilo Sutiah Sutiah Sutiyowati Sutiyowati, Sutiyowati Sutrati Melissa Malik Syamsiar, Syamsiar Taqwim S, M Ainut Titi Purwati Tri Wulan Tjiptono Tri Wulan Tjiptono Very Richardina Vitria, Yati Weirna Yusanti Wibowo, Danang Rujito Widiastuti, Ratih Wulandhari Wulandhari Zaenal Arifin