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Rekontruksi Citra Tomografi Sinar-X Flouresens 2D Berbasis Teknik Radiografi Digital Menggunakan Bahasa Pemrograman Matlab 7.1 M.Si, Sumariyah; Muhlisin, Zainul; Setiawati, Evi
BERKALA FISIKA Vol 13, No 4 (2010): Berkala Fisika
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This research has been done Recontructing of  2D X-ray Flouresense Tomographic Imaging Basis on Digital Radiograhy Technique using MATLAB 7.1 Programming  The research uses an unit Computed Radiografi, a rotated obyect and a reconstruction programme imaging. The shape of rotated object is prisma which made of acrylic, lenght 18 cm and  size sisi 6 cm. The prismacan  rotate continue and as cor of the rotatd obyek uss asylinder still. Recontruction 2D tomographic imaging build from 25 rotatd object radiograf imaging result of expose Computed Radiografi with expose factor constant ang interval increasing rotated angle7,50 . The reconstruction programme 2D Tomographic  consist of the cropping programme which produces  25 slice rotatd obyect forming sinogram and the programm Transformation invers Radon. The result of 2D Tomographic reconstruction in this rsearch obtain cross-sectionalprisma imaging is circle in the triangle sisi same imaging  which habrur.           Keywords: recontruction, tomography and radiography
KAJIAN PENGARUH WARNA DAN JARAK LAMPU PENGAMAN TERHADAP HASIL RADIOGRAF Setiyono, Setiyono; Azam, M.; Setiawati, Evi
BERKALA FISIKA Vol 12, No 1 (2009): Berkala Fisika
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The study of influence of distance, time and color for safety lamp filter variation to radiograph has been done.  The research used blue sensitive film and green sensitive, type ­-X ray, film. The research was conducted by illuminating film with safety lamp red, yellow, green and blue color filter. The type of filter was red acrylic riddle and glass which was layered in red, yellow, green and blue scot light. The variation of irradiating distance between safety lamp with film was 20 cm, 30 cm, 40 cm, 50 cm, 60 cm, 70 cm, 80 cm, 90 cm, 100 cm and variation of time is 10 second, 15 second, 20 second, 25 second, 30 second, 35 second, 40 second, 45 second, 50 second, 55 second, and 60 second. Respectualy measurement of irradiating resulted used measuring densitometer instrument. The result of research give an illustration that variation of distance, variation of time and color of safety lamp filter influence the radiograph.  The greater distance caused the fog result becomes smaller.  The longer time caused the fog result becomes bigger.  To red acrylic filter, the fog that resulted exceed the tolerance limit is more than 0,2, but for glass filter that layered red scot light is not more than tolerance limit. Keyword: Radiograph, Blue sensitive film, Green sensitive film, Fog, Scot light.
Sifat Optis Tak-Linear Pada Material KDP Setyawan, Rahmadi; Setiawati, Evi; Marhaendrajaya, Indras; Firdausi, K. Sofjan
BERKALA FISIKA Vol 11, No 3 (2008): Berkala Fisika
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Non-linier optical properties of transparent material Kalium Di- hydrogen Phosphate (KDP) have been identified under the influence of external magnetic fields at wavelength 632.8 nm and 532 nm by using Faraday Effect method. The external  magnetic fields used in this experiment is produced from coils with total turns of 810, wire diameter of 0,8 mm, and soft magnet core, and is flowed by maximum AC current 5 A. The magnitude of magnetic fields can be produced is 194.23 mT. The optical property measured here is rotation of polarization angle ß of the laser beam after passed the transparent material. From the experiment, it is obtained Verdet’s constant value for transparent material KDP is (12.60 ± 0.59) min/G-cm at  = 632.8 nm and (14.93 ± 0.73) min/G-cm at  = 532 nm.   Key words: non-linier optic, KDP, magnetic fields, polarization, Verdet’s constant
Studi Radiografi Makro Dengan Variasi Jarak Sumber Sinar-Bayangan (SID) dan Ukuran Fokus Terhadap Pembesaran Bayangan Suriansyah, Nanang; Setiawati, Evi; Firdausi, K. Sofjan
BERKALA FISIKA Vol 10, No 4 (2007): Berkala Fisika
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The dependence of radiograph magnification (M) on the ratio focal spot size to object ( has been studied. The object shape like a coin made from iron which different diameter and variation focal spot size have been used. The experiment condition were set up at the distance of the object to the film of 0 cm (object stick the film) and 45 cm, with the tube voltage of 50 kV, tube’s current of 100 mA, and time of 0.04 s. The results show that the increasing of (leads to the increasing of (M) when the distance of the object to the film is more than 0 (b>0).   Keyword: focal spot, SID, magnification radiograph
Pengukuran Tebal Kontaminasi Zat Radioaktif pada Permukaan Tanah Secara In Situ Menggunakan Spektrometer Gamma Portabel Wijianto, Wijianto; Azam, Much.; Setiawati, Evi; Bunawas, Bunawas
BERKALA FISIKA Vol 9, No 4 (2006): Berkala Fisika
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Determination of contamination’s thickness on the ground for  homogeneous  source compound Cs -137 and Co-60 use portable gamma  spectrometry with height purity germanium detector ( HPGe detector) have been done.There are two methods to determine contamination’s thickness on the ground surface. The first method is Korun’s modification by looking for the total count of gamma ray before and already to experience attenuation for Cs-137 and Co-60 then divided by the decrease of linear attenuation coefficient Cs-137 and Co-60. The second is Xu comparison method by made variation of distance from ground surface to detector surface then compared with total count of gamma ray from one source Cs-137 or Co-60 during counting time. The results from experiment obtained for Korun’s modification for the actual thickness 10 cm, 20 cm and 24 cm have an error at 2 % , for actual thickness 12 and 16 cm,and an error at 3 %, for actual thickness 6 cm and 8 cm an error of 4 % and, for actual thickness 4 cm have an error at 9 %. Then for the Al Ghamdi  to Xu Comparison method,  for Co-60 in the actual thickness 6 cm and 10 cm have error 3 % and 12 %, and for Cs-137 in the  actual thickness 10 cm and 6 cm have error 9 % and 48 %.   Key words:  HPGe detector, portable gamma  spectrometry, contamination, Korun’s modification and Xu comparison method.
PENGARUH VARIASI JARAK DETEKTOR, LUAS LAPANGAN RADIASI DAN POSISI DETEKTOR DARI PUSAT BERKAS RADIASI MENGGUNAKAN MULTI PURPOSE DETECTOR (MPD) PADA PENGUKURAN TEGANGAN SINAR-X Bertua Simamora, Evi Handriani; Anam, Choirul; Setiawati, Evi
YOUNGSTER PHYSICS JOURNAL Vol 2, No 2 (2013): Youngster Physics Journal April 2013
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An evaluation of the distance effect of Multi-Purpose Detector (MPD)-X ray source, variations of field size of radiation and position of the MPD on the X-ray voltage measured, have been done. There are necessary because they have not been recommended from the MPD procedure manual yet. The detector operated at voltage of 70 kV and current-time of 12.5 mAs. The measurement of voltage using MPD from RTI Electronics product. It is multifunction detector that can measure dose and voltage invasively. The previous step is measurement of dose for ensure correct equipment setting. These measurements is done for several variations such as MPD-X ray distance of  60 - 160 cm, field sizes 0f 4x4 cm - 40x40 cm2, detectors position of 0 (at center of beam) and 1-11 cm from centre of beam.   The results are obtained that the voltage that measured is not affected by all of variation values such as distance difference of MPD-X ray source,  field sizes and detectors position. Furthermore, for measurement of outside of radiation beam, MPD   can still measur voltage with good validation. Therefore, the measurement of voltage using MPD has high flexibility because it is not influenced by set up measurement.Keywords: The X ray voltage measurement, Multi-Purpose Detector (MPD), Barracuda.
REKONSTRUKSI CITRA CT DENGAN METODE BACK PROJECTION (BP) DAN ALGEBRAIC RECONSTRUCTION TECHNIQUE (ART) MENGGUNAKAN MATLAB Nur Anisa, Ariyanti; Setiawati, Evi; Anam, Choirul
YOUNGSTER PHYSICS JOURNAL Vol 1, No 1 (2012): Youngster Physics Journal Oktober 2012
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Have been made CT image reconstruction with Back Projection method (BP) and Algebraic Recontruction Technique (ART) used Matlab. Image reconstruction used parallel beam in the projection angle from 0 to 180 degree, with interval 5, 7,5 and 10 degrees. In this research, the number pixels was 30x30. The result shows us that image reconstruction used BP method  still there are lots of blurring, while the image reconstruction used  ART method can display the same object with the original image. In the smaller interval of the angle projections, then it will get better results, but it takes longer. Keywords: image reconstruction, parallel beam, back projection, algebraic reconstruction technique
PENENTUAN CT DOSE INDEX (CTDI) UNTUK VARIASI SLICE THICKNESS DENGAN PROGRAM DOSXYZNRC Andriani, Intan; Anam, Choirul; Setiawati, Evi
BERKALA FISIKA Vol 15, No 3 (2012): Berkala Fisika
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The calculation of CT dose and CTDI has been done by using DOSXYZnrc software. Two kinds of phantoms have been used, i.e air and PMMA phantoms. The volume of phantoms 16 x 16x 16 cm3. The simulation carried out at 120 kV and the particles source 106. The calculation ofdose at the mid of phantom at the z axis, every voxel 0,2 x 0,2 x 0.2 mm3. The  variation of slicethickness were 5 mm, 10 mm, 15 mm and 20 mm. The dosages at every point then were plotted tofind out dose profile, and then were integrated to find out the CTDI. It was obtained that the peakvalue  on the air phantom has a higher value than the PMMA phantom. In the air phantom at theslice thickness of 5 mm, 10 mm, 15 mm and 20 mm were 68.28%, 80.49%, 90.91%, 99.86%. Whilein PMMA were 63.68%, 77.42%, 89.32%, 100%. At the penumbral region, it was obtained thatdosage at the PMAA phantom has a higher than the air phantom. CTDI from the PMAA phantomwas 212.50% and the air phantom was 184%. It was obtained that CTDI independent of slicethickness at the range 5-20 cm.Keywords: DOSXYZnrc, Slice thickness, CTDI
PEMBUATAN KURVA ISODOSIS PAPARAN RADIASI DI RUANG PEMERIKSAAN INSTALASI RADIOLOGI RSUD KABUPATEN KOLAKA - SULAWESI TENGGARA Syahria, Syahria; Setiawati, Evi; Firdausi, K Sofjan
BERKALA FISIKA Vol 15, No 4 (2012): Berkala Fisika
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t have been conducted research about the influence of distance variability betweensecondary radiation source and the determining spot to scatter  radiation exposure in theinspection room I radiology instalation RSUD Kolaka – South East Sulawes, it producted isodosecurve .This research use phantom, in the form of water in the plastic container high 40 cm andwidth 21 cm, with exposure wide 30×  40 cm. Exposure condition is given by fixed expose factor covering of tube voltage 90 kV, tube current 150 mA and exposure time 0.8 second.  Sample in this research is distance of 1 meter; 1,5 meter and 2 meter from the secondary radiation source to thedetermining spot, which measuring the scatter radiation exposure is directly conducted by thesurvey meter measuring instrument.The result of research indicates that the amount of thescattered radiation exposure will downhill progresivley to addition distance, so it can know thepoints/places that safe to the scatter radiation exposure. It can also know the maximum time limitallowed for a radiator worker in the inspection room I.Keywords : Isodose Curve ,  Phantom, Expose factor, Scatter radiation exposure.
ANALISIS ENTRANCE SURFACE EXPOSURE (ESE) DAN KUALITAS RADIOGRAF PHANTOM SEBAGAI PARAMETER KENDALI MUTU PADA PESAWAT MAMOGRAFI Mariani, Erna; Hidayanto, Eko; Setiawati, Evi
YOUNGSTER PHYSICS JOURNAL Vol 2, No 3 (2013): Youngster Physics Journal Juli 2013
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The Entrance Surface Exposure (ESE) and quality of radiograph phantom as part of a Quality Control (QC) were analyzed on mammography machine Hologic M-Series. This research aims to detemine ESE values on mammography machine and determining number of fibers, speck groups and masses on radiograf phantom as part of a Quality Control (QC).The ESE was measured by Multi Purpose Detector (MPD) over the range of kV from 20–27 kV kV for current time 90 mAs, 95 mAs, 100 mAs, and phantom radiograph was tested by CIRS model 015 phantom was exposed at 23 kV for current time 90 mAs, 95 mAs, 100 mAs. The ESE values by direct measurement ranged from 3,22 mGy to 10,86 mGy and The ESE values by calculation of backscatter factor ranged from 3,59 mGy to 11,73 mGy and phantom radiograph testing qualitatively the number of fibers, speck groups, and mass in over the range of tolerances are 4 for fibers, 3 for speck groups, and 3 for the masses. This results shown that the mammography machine is still good condition and proper to be used for clinical examination moreover the result of phantom radiograph can be read properly and can diagnose symptoms of abnormalities in breast tissue properly.Keywords: Entrance Surface Exposure (ESE), phantom radiograph, quality control, mammography machine, Multi Purpose Detector (MPD).