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All Journal INDONESIAN JOURNAL OF APPLIED PHYSICS Jurnal Fisika dan Terapannya
Pratiwi, Ayu Hardianti
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Astronomy Energy Materials Science & Nanotechnology Physics

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Analisis Nilai Entrance Skin Dose (ESD) dan Dosis Hamburan pada Area Tiroid dan Area Gonad pada Phantom PMMA Planar Menggunakan Pesawat Fluoroskopi C-Arm Asmayati; Astuty, Sri Dewi; Prastowo, Alan Tanjung Aji; Dewang, Syamsir; Ibrahim, Ajeng Anggreny; Pratiwi, Ayu Hardianti
JFT : Jurnal Fisika dan Terapannya Vol 12 No 1 (2025): Juni 2025
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v12i1.55995

Abstract

A study has been conducted analyzing the Entrance Skin Dose (ESD) value on PMMA phantoms based on variations in Field of View (FOV) and thickness. In addition, the magnitude of the dose scattering that reaches the thyroid and gonad areas of radiation workers when C-Arm fluoroscopy examination is performed was also tested. The variation in phantom thickness values ​​was 15, 20, and 25 cm while the variation in FOV irradiation values ​​was 12, 15, 17, and 20 cm. The purpose of the study was to determine the magnitude of the change in ESD value due to changes in object thickness which will also directly affect changes in peak voltage for each irradiation. This also has implications for providing an increasing scattering dose due to the presence of the object. The results showed that the larger the FOV and thickness of the phantom, the higher the ESD value received. At a phantom thickness of 25 cm, ESD increased from 6.42 mGy at a FOV of 12 cm to 11.61 mGy at a FOV of 17 cm. The scatter dose value that reaches the thyroid area is a maximum of 22.31 µSv at FOV 20 cm, while the gonad area receives 1.647 µSv, which is lower because the fluoroscopy machine is equipped with Pb protection for radiation workers when performing interventions. The conclusion in C-arm fluoroscopy examinations, radiation workers must also use protective equipment for other vital areas such as Pb glasses and neck protection to be safer from scattered radiation.
Pembuatan dan Uji Nilai HU Jaringan Tulang Buatan Berbahan Dasar Cangkang Telur Eunike Yusmaliani; Astuty, Sri Dewi; Purwanto; Dewang, Syamsir; Bannu; Ibrahim, Ajeng Anggreny; Pratiwi, Ayu Hardianti
JFT : Jurnal Fisika dan Terapannya Vol 12 No 1 (2025): Juni 2025
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v12i1.58374

Abstract

Performance evaluation of diagnostic radiology modalities strongly supports the quality of radiation and images for diagnosis. This test requires certain materials as a substitute for human objects to avoid excessive radiation. Phantom as one of the object replacement media has been directed according to the characteristics of the tissue. This study aims to obtain the radiation response of artificial bone tissue made from eggshells with the addition of rice bran, resin and catalyst, in 4 (four) mixture compositions. Test variations were carried out by changing the X-ray tube voltage (80 kV, 100 kV, 120 kV and 140 kV) to obtain CT-Scan images and analyzed using Radiant DICOM software. The results showed that the Hounsfield unit (HU) value of the artificial bone phantom corresponded to the HU value range of real bone organs, which is between 100 and 700 HU. This value affects the analysis of the resulting image resolution in the form of SNR and CNR values, in the range of (8.07-37.38) and (14.98-28.20), respectively. Conclusion Artificial bone tissue phantom made from eggshells and rice bran has the potential as a testing medium because it corresponds to the characteristics of human bones, especially in adulthood, and has the potential as a testing medium.
Sintering Temperature Effect to the Synthesis of SiC Produced from Rice Husk ash and 2B Graphite Pencils Irfanita, Resky; Ansar, Asnaeni; Pratiwi, Ayu Hardianti; J, Jasruddin; S, Subaer
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 5, No 01 (2015): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v5i01.258

Abstract

The objective of this study is to investigate the effect of sintering temperature on the synthesis of SiC produced from rice husk ash (RHA) and 2B graphite pencils. The SiC was synthesized by using solid state reaction method sintered at temperatures of 750°C, 1000°C and 1200°C for 26 hours, 11.5 hours and 11.5 hours, respectively. The quantity and crystallinity level of SiC phase were measured by means of Rigaku MiniFlexII X-Ray Diffraction (XRD). The microstructure of SiC was examined by using Tescan Vega3SB Scanning Electron Microscopy (SEM). The XRD results showed that the concentration (wt%) of SiC phase increases with the increasing of sintering temperature. SEM results showed that the crystallinity level of SiC crystal is improving as the sintering temperature increases
Co-Authors Ajeng Anggreny Ibrahim, Ajeng Anggreny Ansar, Asnaeni Asmayati Bannu Eunike Yusmaliani Irfanita, Resky J, Jasruddin Prastowo, Alan Tanjung Aji Purwanto S, Subaer Sri Dewi Astuty Ilyas Syamsir Dewang