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All Journal Journal of Medical Physics and Biophysics Jurnal Spektra Jurnal Profesi Medika: Jurnal Kedokteran dan Kesehatan Spektra: Jurnal Fisika dan Aplikasinya
Supriyanto Ardjo Pawiro
University of Indonesia
Aerospace Engineering Electrical & Electronics Engineering Energy Health Professions Materials Science & Nanotechnology Medicine & Pharmacology Physics

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PERBANDINGAN KARAKTERISTIK SCANNER VIDAR DOSIMETRYPRO ADVANTAGE DAN EPSON PERFECTIO V700 BERBASIS DOSIMETRI FILM RADIOCHROMIC EBT2 Surya Miharja, Ari; Ardjo Pawiro, Supriyanto
Jurnal Spektra Vol 15, No 2 (2014): Spektra: Jurnal Fisika dan Aplikasinya
Publisher : Jurnal Spektra

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Abstract

Telah dilakukan penelitian untuk menentukan karakteristik dasar dari scanner yang digunakan untuk dosimetri film radiochromic EBT2.Dalam penelitian ini digunakan scanner Vidar DosimetryPro Advantage dan Epson Perfection V700. Pengujian yang dilakukan meliputi uji konsistensi scanner, uji variasi film to film, uji uniformitas scanner, uji efek orientasi film, uji suhu ruang penyimpanan film, uji fading film dan uji noise film/scanner. Scanner diuji menggunakan film EBT2 yang telah dipapar radiasi menggunakan Linac dengan modalitas foton 6 MV. Film mempunyai 8 buah lapangan berukuran 3 cm x 3 cm dengan dosis dari 31,31 – 250,48 cGy. Software yang digunakan untuk menganalisa hasil bacaan scanner adalah ImageJ dan FilmQA Pro. Dari hasil pengujian didapatkan konsistensi Vidar mode Logarithmic lebih baik dengan standar deviasi (SD) kurang dari 0,06%, sedangkan standar deviasi Epson mencapai 0,40%. Uniformitas Vidar juga lebih baik dengan SD kurang dari 0,76% dibandingkan Epson yang mencapai 1,16%. Orientasi film cukup berpengaruh terhadap hasil bacaan, terutama pada Epson, sehingga orientasi film harus konstan selama pemindaian.Performa Vidar secara keseluruhan lebih bagus daripada Epson terutama saat red channel saja yang dianalisa. Kata kunci : film radiochromic EBT2 , film scanner, Vidar DosimetryPro Advantage, Epson Perfection V700, film dosimetri.
New face of Journal of Medical Physics and Biophysics: a reflection of new spirit from a new organization Supriyanto Ardjo Pawiro
Journal of Medical Physics and Biophysics Vol 3, No 1 (2016)
Publisher : Indonesian Association of Physicists in Medicine (AIPM/AFISMI)

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Abstract

The meeting in Yogyakarta in November 2015 marked a new chapter of Medical Physics educational, scientific, and professional development in Indonesia; a new professional body, declared as Indonesian Association of Physicists in Medicine, was born a result of unification between Indonesian Medical Physics and Biophysics Association and Indonesian Medical Physicists Association. This long-awaited milestone was reached as a mutual agreement and recognition between the founders, prominent figures, and members of the two groups of medical physicists, academia, and scientists. The unification was followed by a major re-organization during which a new committee with a set of new people was involved in setting new foundations of the newborn organization. This great labor includes also a setting of a new board responsible for scientific publications, reflected on the change of JMPB’s look and how it runs.    In this issue, readers and authors of JMPB might have noticed some change in the face and looks in the articles—the layout, the cover, and the structure. Whereas the journal previously accommodates medical physics-related sections of Diagnostic and Interventional Imaging, Radiation Therapy, Nuclear Medicine, Experimental Biophysics, and Computational Biophysics, the new format introduces new sections of Radiological Protection, and Review Article, enabling a broader possibility of research scope published in JMPB. These new arrangements, however, is made complex with the shift of technical team members working behind the screen, causing a major delay in article processing. To add to that extent, JMPB also experienced a catastrophic technical issue on our web server, which has not been resolved until recently. Therefore, I believe it is both timely and appropriate to extend the team’s sincere apologies for any inconvenience caused. I, now, in the new spirit as new as the new look of the journal, encourage more submissions to JMPB for a wider audience, and to support this new organization facing its new dawn.
Jejak kontribusi JMPB dalam membangun budaya ilmiah Fisika Medis nasional: Edisi Khusus PIT-FMB 2017 Supriyanto Ardjo Pawiro
Journal of Medical Physics and Biophysics Vol 5, No 2 (2018)
Publisher : Indonesian Association of Physicists in Medicine (AIPM/AFISMI)

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Associate Medical Physicists: our bridge towards fulfilling national demand of Clinically Qualified Medical Physicists Supriyanto Ardjo Pawiro
Journal of Medical Physics and Biophysics Vol 5, No 1 (2018)
Publisher : Indonesian Association of Physicists in Medicine (AIPM/AFISMI)

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Rejuvenating scientific culture in Indonesian medical physicists and biophysicists: the role of Journal of Medical Physics and Biophysics Supriyanto Ardjo Pawiro
Journal of Medical Physics and Biophysics Vol 4, No 1 (2017)
Publisher : Indonesian Association of Physicists in Medicine (AIPM/AFISMI)

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english english Ulya, Syarifatul; Ryangga, Dea; Wibowo, Wahyu Edy; Nasution, Nuruddin; Pawiro, Supriyanto Ardjo
Jurnal Profesi Medika : Jurnal Kedokteran dan Kesehatan Vol 17 No 1 (2023): Jurnal Profesi Medika : Jurnal Kedokteran dan Kesehatan
Publisher : Fakultas Kedokteran UPN Veteran Jakarta Kerja Sama KNPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33533/jpm.v17i1.5848

Abstract

Regarding the increasing use of small-field photons in clinical treatment, in this study, we investigate the use of small-field electron beams in clinical treatment. This study aimed to evaluate small-field electron beam dosimetry of the nasopharyngeal, thyroid, and ethmoid sinus carcinoma cases. Dose measurement was done using EBT3 film. In nasopharyngeal cases with a homogenous area and irregular surface, the dose discrepancies for 6 MeV energy were unpredictable except for the 5×5 cm2 field size. For all energies in 5×5 cm2 field size, the dose discrepancies were less than 3%. In these cases, we found that a smaller electron beam field will increase the percentage of the dose discrepancy. This is caused by the effect of the lateral scatter disequilibrium in a small field electron beam. For ethmoid sinus cases, dose discrepancy depends on the field size and inhomogeneity of bone and tissue organ. Based on the evaluation of doses on the spinal cord, chiasm, and larynx (OAR), it can be seen that these organs received a very small dose. From this result, a small field electron beam is recommended for cases with a homogeneous target. However, in cases with a heterogenous target, further investigation is needed.
THE COMPARISON OF 2D DOSE PATIENT-SPECIFIC QUALITY ASSURANCE BETWEEN MONTE CARLO-CONVOLUTION AND MODIFIED CLARKSON INTEGRATION ALGORITHM Azzi, Akbar; Pawiro, Supriyanto Ardjo; Mart, Terry
Spektra: Jurnal Fisika dan Aplikasinya Vol. 8 No. 2 (2023): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 8 Issue 2, August 2023
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPEKTRA.082.01

Abstract

A sophisticated machine of radiotherapy treatment process follows the complexity of the quality assurance (QA) measurement. Non-measurement QA becomes one of the solutions to reduce the medical physicists’ workload. However, this method has not been clinically established. This study compared two non-measurement methods of patient-specific quality assurance (PSQA) to find the feasible algorithm for the adaptive radiotherapy process. Monte Carlo-based (MC) PSQA used a phase space file of the medical linear accelerator (Linac) to obtain the photon energy fluence and forward projected to the isoplane. In contrast, Modified Clarkson Integration-based (MCI) used a non-uniform fluence map in the isoplane. For the modulated intensity, we used a pair of the dynamic log files of the multileaf-collimator (MLC) and then employed them in the algorithms. The dose distributions of MC and MCI methods were compared to the treatment planning system (TPS) using gamma index analysis. We found that the gamma pass rates (GPR) for MC-TPS and MCI-TPS were 99.54% and 99.57%, respectively. Further, the dose distribution in the off-axis region for the MCI method showed lesser accuracy due to the higher secondary dose contribution. The linac log file information can be used and calculated into a 2D dose distribution using both MC and MCI methods, providing high-accuracy results.
Co-Authors Ari Surya Miharja, Ari Azzi, Akbar Nasution, Nuruddin Ryangga, Dea Terry Mart Ulya, Syarifatul Wahyu Edy Wibowo, Wahyu Edy