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All Journal Journal of Medical Physics and Biophysics Jurnal Spektra Jurnal Penelitian Sains Jurnal Profesi Medika: Jurnal Kedokteran dan Kesehatan Spektra: Jurnal Fisika dan Aplikasinya PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Indonesian Journal of Cancer
Supriyanto Ardjo Pawiro
University Of Indonesia
Aerospace Engineering Biochemistry, Genetics & Molecular Biology Chemistry Electrical & Electronics Engineering Energy Health Professions Immunology & microbiology Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Public Health Other

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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.
Verifikasi Dosimetri Teknik Stereotactic Body Radiotherapy (SBRT) Metastasis Tulang: Studi Kasus Menggunakan Fantom Homogen dan Inhomogen Yosi Sudarsi Asril; Wahyu Edy Wibowo; Supriyanto Ardjo Pawiro
Jurnal Penelitian Sains Vol 18, No 2 (2016)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (697.653 KB) | DOI: 10.56064/jps.v18i2.22

Abstract

Kanker menyebabkan 13% dari total semua kasus penyebab kematian, dan matastasis tulang adalah komplikasi umum dari kanker yang terjadi diatas 40% pada pasien onkologi. Sekitar 70% metastasis akan melibatkan tulang belakang. Stereotactic body radiotherapy (SBRT) adalah salah satu teknik yang dapat menangani metastasis tulang karena dapat memberikan dosis radiasi tinggi pada volume kecil dengan margin yang sangat rapat. Dalam perencanaan radioterapi untuk foton energi tinggi sering tidak sesuai dalam memperkirakan distribusi dosis dengan keberadaan material tidak homogen. Oleh karena itu dibandingkan hasil dosis pada fantom homogen (CIRS Model 002 H9K) dengan fantom inhomogen (CIRS Model 002 LFC) menggunakan tiga dosimeter, yaitu mikrochamber exradin A16, film gafchromic EBT3, dan TLD LiF: Mg, Ti rods. Hasil yang didapatkan dari pengukuran kedua fantom membuktikan bahwa film gafchromic EBT3 merupakan dosimeter terbaik dalam pengukuran dosis pada lapangan kecil dengan masing-masing deskripansi -0,30% pada fantom homogen dan -1,57% pada fantom inhomogen. Mikrochamber juga memperlihatkan kemampuannya dengan mendapatkan deskripansi tidak begitu jauh dengan film gafchromic EBT3 yaitu -0,52% pada fantom homogen dan -3,87% pada fantom inhomogen. Sedangkan menggunakan TLD LiF:Mg, Ti rods masing-masing deskripansinya -11,96% dan -13,88% pada fantom homogen dan inhomogen.
Point dose measurement on center and peripheral target for stereotactic treatment using Helical Tomotherapy Hi-Art Laras Ati Nur Fatimah; Nuruddin Nasution; Wahyu Edy Wibowo; 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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Abstract

Stereotactic radiosurgery (SRS) and stereotactic radiotherapy (SRT) using tomotherapy were advanced radiotherapy technique with prescribing high dose on the peripheral target to get as steep as possible fall-off dose criteria on the target. These technique need an accurate and high precision treatment delivery also passing the criteria for patient specific quality assurance. Point dose measurement was a simple verification to ensure these goals. However, there are many issues for point dose measurement with ionisation chamber related to the problem of high dose gradient area on the peripheral target. Therefore, the purpose of this study was to verify the assessment criteria of ±3% discrepancies for center and peripheral target measurement. The work has been done by point dose verification for 11 patient with brain cancer using Helical Tomotherapy Hi-Art. Point dose measurement were done on the center and peripheral PTV, also brainstem for organ parameter in the off-axis area, using Exradin A1SL. The measurement results show that highest discrepancy compared to the dose plan for center and peripheral target reach 1.95% and 2.81%, respectively. The Higher discrepancies shows for peripheral target compared to the center target measurement. The measurement on the brainstem show a highest discrepancies reach 5.29%. This result occur because of the off-axis area of the brainstem location. In conclusion, the center and peripheral target measurement are meet the criteria ±3% by the dose plan with peripheral target measurement shows higher discrepancies influences by volume averaging effect and lack of particle equilibrium of the condition related to the chamber size.
Medical Physics Education and Profession in South-East Asia: Challenges for the Region Supriyanto Ardjo Pawiro
Journal of Medical Physics and Biophysics Vol 2, No 1 (2015)
Publisher : Indonesian Association of Physicists in Medicine (AIPM/AFISMI)

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Abstract

Entrance Skin Dose Measurement Using GafChromic Dosimetry Film for Adult Patients Undergoing Coronary Angiography (CA) and Percutaneous Transluminal Coronary Angioplasty (PTCA) Endang Nurtriningsih; Kristina Tri Wigati; Erlin Ingrina; Yurneli Luthan; Supriyanto Ardjo Pawiro
Journal of Medical Physics and Biophysics Vol 1, No 1 (2014): Inaugural Issue
Publisher : Indonesian Association of Physicists in Medicine (AIPM/AFISMI)

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Abstract

The complexity of interventional procedures has led to increasingly longer procedure time that require significant fluoroscopic use. Fluoroscopy time is proportional to the patient dose. Once a threshold dose has been exceeded, the severity of the radiation effect at any point on the skin increases with increasing dose. The threshold dose for transient skin injuries is typically 2 Gy for erythema, the earliest detectable effect of radiation on the skin. Therefore, it is important to monitor radiation entrance exposure to the patients. Since it is not uncommon that a patient not only perform a single examination, the skin dose per examination is recommended to note if in the future radiation effect on the patient's skin arises. The skin dose records will help further treatment. The aim of this study is to evaluate patient dose in interventional radiology. Twenty one cardiac intervention procedures were studied: 12 coronary angiography (CA) dan 9 percutaneous transluminal coronary angioplasty (PTCA). The entrance surface dose were measure using DAP (dose-area product) and GafChromic XR-RV3 radiochromic film attached to the skin. GafChromic film measurement obtained the skin dose distribution on the back of the coronary area. In addition, we also measure the patient backscattering dose on the thyroid, gonad and eyes. Image analysis was performed using red channel component of standard RGB (red, green and blue) color space image. The correlation between maximum radiation surface dose and dose area product for two interventional procedures was investigated. We found a good correlation of DAP (dose-area product) and maximum entrance skin dose (R2 = 0.79, R2 = 0.52 for CA and R2 = 0.74 for PTCA). However, fluoroscopy time seems to have a poor relationship with the patient entrance surface dose (R2 = 0.43). The total irradiation time, DAP and entrance surface dose for PTCA procedures is higher than CA procedures because of the PTCA procedure is more complex. The entrance surface dose delivered to the patient can be easily measured when GafChromic films are used. The GafChromic dosimetry allows precise mapping of the skin dose distribution, when placed close to the skin. The GafChromic film results that the radiation dose to the surface for PTCA procedure greater than CA.
Karakteristik berkas foton lapangan kecil setengah lapangan (half beam) dengan menggunakan wedge Elsa Angelina; Wahyu Edy Wibowo; Riana Dian Pertiwi; 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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Abstract

Penelitian ini bertujuan untuk mengetahui profil berkas foton lapangan kecil setengah lapangan (half beam) dengan menggunakan wedge yang dapat menjawab tantangan radioterapi tumor sino-nasal yang diketahui memiliki lokasi yang sangat kompleks. Pengukuran dilakukan dengan berkas foton 6MV menggunakan dosimeter film Gafchromic EBT3 yang dilakukan pada kedalaman 1.5 cm, 5 cm dan 10 cm untuk setiap lapangan penyinaran 0.8 × 0.8 cm2, 1.6 × 1.6 cm2, 2.4 × 2.4 cm2, 3.2 × 3.2 cm2 dan 4 × 4 cm2 dengan menggunakan physical wedge dengan besar sudut 15°, 30°, 45° dan 60° serta dilakukan variasi penyinaran yaitu daerah penyinaran wedge tipis dan tebal. Hasil pengukuran didapatkan bahwa nilai FWHM dan penumbra cenderung naik seiring dengan semakin dalamnya pengukuran. Selain itu, nilai FWHM cenderung lebih besar 1.59% saat daerah penyinaran wedge tipis. Penumbra memiliki rentang nilai 0.15 – 0.36 cm dengan anomali sebesar 80% (n=135) jika definisi penumbra merupakan jarak level isodosis 80% - 20% dan 0.24% (n=135) jika definisi penumbra merupakan jarak level isodosis 50% - 20%. Kesimpulannya, dari hasil pengukuran nilai deviasi FWHM dan penumbra (80% - 20%) terkecil masing-masing 0.92% dan 0.33 cm pada lapangan 0.8×0.8 cm2 wedge 60°, namun tidak ada hubungan yang pasti antara wedge dengan nilai FWHM dan penumbra pada lapangan kecil.
Audit dosimetri treatment planning system berkas foton pada radioterapi eksternal : A Review Andrian Dede Handika; Sonak Tioria Tarigan; Petrananda Dea Karunia; Ahmad Syafi'i; Annisa Rahma Fauzia; Khaerul Mar'ie; Putri Amalia Pontoh; Supriyanto Ardjo Pawiro
Journal of Medical Physics and Biophysics Vol 7, No 1 (2020)
Publisher : Indonesian Association of Physicists in Medicine (AIPM/AFISMI)

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Abstrak: Treatment Planning System (TPS) merupakan modalitas penting yang menentukan hasil tindakan radioterapi. Akurasi perhitungan dosis pada TPS dipengaruhi oleh algoritma yang digunakan. Berdasarkan database internasional, TPS termasuk salah satu penyebab utama terjadinya kecelakaan radiasi pada radioterapi. Oleh karena itu, TPS perlu diaudit secara dosimetri untuk memastikan akurasi dosis yang diterima oleh target serta mengurangi kemungkinan terjadinya kecelakaan radiasi pada radioterapi. Penelitian tentang audit dosimetri TPS berkas foton telah banyak dilakukan oleh peneliti di berbagai negara, namun hingga saat ini belum ada review artikel mengenai hasil penelitian-penelitian tersebut. Review artikel ini membahas tentang berbagai hasil penelitian audit dosimetri TPS berkas foton dengan algoritma yang berbeda di beberapa center rumah sakit. Terdapat beberapa jenis algoritma TPS yang dibahas antara lain: Adaptive Convolution (AC), Anisotropic Analytical Algorithm (AAA), superposisi, dan konvolusi. Audit dosimetri TPS menggunakan fantom CIRS 002LFC yang sebelumnya telah dipindai dengan CT-Scanner. Pengukuran dosis sebagian besar menggunakan detektor bilik ionisasi. Metodologi audit dosimetri mengikuti protokol TECDOC IAEA 1583. Sebagian besar deviasi hasil audit dosimetri TPS berkas foton berada pada rentang toleransi yang dianjurkan dalam TECDOC IAEA 1583. Deviasi diluar rentang toleransi umumnya ditemukan pada material inhomogen. Secara keseluruhan, berdasarkan hasil analisis, TPS dengan algoritma AC memiliki nilai deviasi paling kecil, selanjutnya AAA, superposisi, dan konvolusi. Nilai deviasi meningkat sebanding dengan energi berkas foton yang dihasilkan oleh Linier accelerator (Linac). Review hasil audit dosimetri TPS dengan algoritma yang lain dapat dilakukan sebagai pembanding.Abstract: Treatment Planning System (TPS) is an important modality which determines the radiotherapy treatment result. The accuracy of the dose calculation in TPS is affected by the applied algorithm. Based on the international database, TPS is one of the main factors which cause radiation accidents in radiotherapy. Therefore TPS has to be audited dosimetrically to ensure the accuracy of the dose delivery to targets and moreover to reduce the possibility of radiation accidents in radiotherapy. Studies about dosimetry audit of radiotherapy TPS, especially for photon beam, have been done in many countries. Yet there has been no article review about those studies.  Because of that, authors attempt to review some studies relating with dosimetry audit of TPS with different applied algorithms in some radiotherapy centers. There are four different algorithms explaining in this article review, those are adaptive convolution (AC), anisotropic analytical algorithm (AAA), superposition, and convolution. Dosimetry audit of TPS used CIRS phantom 002LFC which had been scanned with CT scanner. Most of the dose measurement used ionization chamber detector. The procedure of this dosimetry audit followed TECDOC IAEA 1583. The deviation of most former studies results is on tolerance range. The deviation beyond tolerance range is found in heterogeneous materials. Based on the analytical result, TPS with AC algorithm has the smallest deviation, followed by AAA, superposition, and the last is convolution. The deviation increases with the beam energy. Review about dosimetry audit of TPS with others algorithms can be done for the next project. Kata kunci : Audit dosimetri, TPS, algoritma, deviasi Keywords: Dosimetry Audit, TPS, algorithm, deviation
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.
Lateral setup error analysis of dosimetric impact for nasopharynx carcinoma using intensity modulated radiotherapy treatment Syarifatul Ulya; Nuruddin Nasution; Wahyu Edy Wibowo; 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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Abstract

Patients with nasopharyngeal carcinoma have been analyzed for lateral setup error. Systematic and randomized inter-fractional setup errors were evaluated in 48 patients with this case. Based on these errors, the margin was drawn from CTV to obtain the delineation of PTV structure, called PTV margin. MVCT system in tomotherapy has been used to get the number of error with four-degree direction setup. Moreover, the biggest error direction value was evaluated with in 6 patients and analyzed at D98 in each PTV and OARs. The result of PTV margin for the lateral, longitudinal, vertical, and rotation was 4.91 mm, 4.27 mm, 3.37 mm and 3.53 mm, respectively. According to the result of the PTV margin, a lateral direction showed the biggest value of error. So, achievable dose coverage of PTVs on the effect of the lateral shift were 87.04%, 60.19%, and 50% for 2, 4 and 6 mm, respectively. Furthermore, OAR dose in the right position is increasing with larger shift setup direction.
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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Abstract

Co-Authors Ahmad Syafi'i Ahmad Zaki Dzulfikar, Ahmad Zaki Andrian Dede Handika Annisa Rahma Fauzia Ari Surya Miharja, Ari Assyifa Rahman Hakim Azzi, Akbar Cahya Wulandari Deni Hardiansyah Djarwani S. Soejoko Elsa Angelina Endang Nurtriningsih Erlin Ingrina Fajar Haristyo Fatimah Kunti Hentihu, Fatimah Kunti Fira Dwi Ananda Harfiyyah, Vivin Fashihatil Indra Budiansah Khaerul Mar'ie Kristina Tri Wigati Laras Ati Nur Fatimah Maqsuroh, Fiki Hurum Nurdina Gita Pratiwi Nuruddin Nasution Nuruddin Nuruddin Petrananda Dea Karunia Priska Andini Putri Putri Amalia Pontoh Riana Dian Pertiwi Rina Taurisia Ryangga, Dea Sonak Tioria Tarigan Suwandi Suwandi Syarifatul Ulya Syarifatul Ulya Syarifatul Ulya Terry Mart Wahyu Edy Wibowo Wahyu Edy Wibowo Wahyu Edy Wibowo Wahyu Edy Wibowo Wahyu Edy Wibowo Yosi Sudarsi Asril Yosi Sudarsi Asril Yurneli Luthan Zahro, Ummu Mar’atu