cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
,
INDONESIA
Journal of Medical Physics and Biophysics
Published by Himpunan Fisika Medis dan Biofisika Indonesia
ISSN : 23552727     EISSN : 23552719     DOI : -
Core Subject : Health, Science,
Medicine & Pharmacology Physics
Journal of Medical Physics and Biophysics is a gold open-access journal and serves as official publication media of the Indonesian Association of Physicists in Medicine, IAPM (Aliansi Fisikawan Medik Indonesia, AFISMI). JMPB publishes articles with the general concern on the application of physics in medicine and the biological system. The role of physics highlighted in the journal can be of theoretical, experimental, or clinical nature. Review and original articles in radiation oncology, diagnostic and interventional radiology, nuclear medicine, biomaterial, physical biology, physical modeling of biological system, and other related sciences are welcome. Any opinions stated on the articles published in JMPB are those of the author(s) and do not necessarily reflect the policy of IAPM/AFISMI unless otherwise stated.
Arjuna Subject : -
Articles 69 Documents
 1   2   3   4   5 
Simple Calculation of the Radiation Flux Distribution for Brachytherapy Using Microsoft Excel Sarah Ismi Kamilah; Freddy Haryanto
Journal of Medical Physics and Biophysics Vol 2, No 1 (2015)
Publisher : Indonesian Association of Physicists in Medicine (AIPM/AFISMI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (578.232 KB)

Abstract

One of the therapies used to destroy cancer cells is brachytherapy. This type of therapy has a radioactive source located in right position or near the cancer cells. In fact, brachytherapy is always faced a high risk for patients’ safety. Calculation of radiation dose distribution is one tool to optimized therapy. However, mostly people do not understand about it, even medician. This is the background from author to do simple study about calculation of the radiation particle flux distribution and make simple concept about it. The method in this study used coordinate transform to have formula. This calculation based on the geometry of various radioactive sources, being brought closer to the point and line. The formula used to have contour curves with simple computing in Excel. Contour curves from this radiation particle flux distribution is in two – dimensional form. The result showed that isodose contours curves from research used excel were similar with references in quantitatively. This way is very simple and people can easily understand the basic concept of calculate from radiation particle flux distribution.Keywords: Brachytherapy, Flux, Radioactive Source Geometry, Isodose, Microsoft Excel
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)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (119.856 KB)

Abstract

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)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (267.9 KB)

Abstract

Time and Entropy: The Two Sides of The Same Medal in Ideal Open Systems Horst Josef Koch
Journal of Medical Physics and Biophysics Vol 3, No 1 (2016)
Publisher : Indonesian Association of Physicists in Medicine (AIPM/AFISMI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (458.496 KB)

Abstract

The second thermodynamic law implies a continuous  increase of        entropy with time and a formal relation of both characteristics.        Based on observations in ideal biophysical diffusion processes the letter presents a    model that substantiates an exponential relationship            between time and entropy.
Virtual study to investigate the detectability of breast abnormalities on 2D mammography and digital breast tomosynthesis Kristina Tri Wigati; Hannah Manssens; Liesbeth Vancoillie; Cockmartin Lesley; Djarwani Soeharso Soejoko; Hilde Bosmans; Kristina Bliznakova
Journal of Medical Physics and Biophysics Vol 5, No 1 (2018)
Publisher : Indonesian Association of Physicists in Medicine (AIPM/AFISMI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1576.455 KB)

Abstract

This paper describes the use of virtual clinical trial software, as developed and improved in the frame of the Horizon2020 MaXIMA project, to study particular aspects of 2D mammography and digital breast tomosynthesis. A voxel-based breast phantom with inserted mathematical models of an irregular mass and two microcalcifications was created. Image acquisition was simulated by using XRAYImagingSimulator, while image reconstruction was accomplished with FDKR software. Series of images were created for different angular ranges with an identical total dose. Detectability of the abnormalities was investigated using visual assessment and quantitative measurements. The results agree with other studies in literature studying the same aspects and therefore confirm the value of the new framework for other future applications.
Scatter index measurement using a CT dose profiler Choirul Anam; Freddy Haryanto; Rena Widita; Idam Arif; Toshioh Fujibuchi; Takatoshi Toyoda; Geoff Dougherty
Journal of Medical Physics and Biophysics Vol 4, No 1 (2017)
Publisher : Indonesian Association of Physicists in Medicine (AIPM/AFISMI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (626.874 KB)

Abstract

The CT dose index (CTDI) is usually measured using a pencil chamber with a length of 100 mm on a CTDI phantom with a length of 150 mm. The scattering radiation dose beyond 100 mm is usually still significant despite using a small beam width (below 10 mm). This study aims to measure the scattering index of CT dose for several variations of input parameters. The scatter index measurements were performed on a multi-slice CT (MSCT) Alexion™ using a CT dose profiler detector connected to a Black Piranha electrometer (RTI Electronic, Sweden). The measurements used the helical mode and a beam width of 2 x 4 mm, and resulted in 150 mm dose profiles. Values of CTDI150, CTDI130 and CTDI100 were calculated and used to obtain values of the scatter indices (SI130 and SI150). We varied input parameters, such as tube voltage, tube current, and pitch, and used two types of CTDI phantoms, i.e. body and head. In the tube voltage variation (from 80 to 135 kV), we found SI130 and SI150 values of 1.13 ± 0.01 and 1.19 ± 0.01 for the body CTDI phantom; and  SI130 and SI150 values of 1.08 ± 0.01 and 1.11 ± 0.01 for the head CTDI phantom. For tube current variations from 25 to 120 mA, and pitch variations from 0.75 to 1.5, SI130 and SI150 values were 1.14 ± 0.00 and 1.20 ± 0.00 for the body CTDI phantom; and 1.08 ± 0.00 and 1.11 ± 0.00 respectively for the head CTDI phantom. We showed that the more frequently used CTDI100 value is too small because it ignores scattering beyond the 100 mm boundary, even for beam widths less than 10 mm. The scatter index values were strongly influenced by the size of the CTDI phantom, and were slightly affected by the tube voltage. Variations in tube currents and pitch did not affect the value of the scatter index. The scatter index values of SI130 and SI150 were significantly different, and suggests that the use of SI150 is even more appropriate for describing the scattering dose.
Dose Volume Product (DVP) As Descriptor for Estimating Total Energy Imparted to Patient Undergoing CT Examination Choirul Anam; Freddy Haryanto; Rena Widita; Idam Arif; Geoff Dougherty
Journal of Medical Physics and Biophysics Vol 3, No 1 (2016)
Publisher : Indonesian Association of Physicists in Medicine (AIPM/AFISMI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (545.031 KB)

Abstract

The purpose of this study is to expand a descriptor for estimating the total energy imparted to a patient undergoing a CT examination and to investigate its relationship to the currently used descriptor. Estimating the total energy imparted to a patient has previously been characterized by dose length product (DLP). We propose a descriptor which we call the dose volume product (DVP), defined as the product of the size specific-dose estimate (SSDE) and the volume irradiated in the patient (V). We also present algorithm to automate the calculation of DVP. There are several steps in calculating the DVP: the first is to contour the patient automatically, the second is to calculate the area of patient in every single slice, the third is to calculate the volume of the radiated part of the patient, the fourth is to calculate the water equivalent diameter (DW) automatically, the fifth is to calculate the SSDE, and the last is to calculate the DVP. To investigate the effectiveness of the algorithm, we used it on images of phantoms and patients. The results of this study show that the automated calculations of DVP for both body and head phantoms were in good agreement with theoretical calculations. The differences between them were within 2%. DVP and DLP had a linear relationship with R2 = 0.971 (slope 1099 cm2, 95% confidence interval (CI), 1047 to 1157 cm2) and R2 = 0.831 (slope 248.6 cm2: CI, 237.6 to 259.7 cm2), for thorax and head patients respectively.
The lateral shift effect of gamma index evaluation on tomotherapy Yosi Sudarsi Asril; 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)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (592.99 KB)

Abstract

Fourteen patients with different cases have been planned and treated using helical Tomotherapy HI-ART system. To investigate the lateral shift effect on gamma index, the planning verification was evaluated for a point dose and a fluence dose measurement using ion chamber and Gafchromic EBT3 film, respectively. As a result, the difference between a measured and calculated point dose was under 3% for all interest organs, which account for 1.46±0.71% (parotid), 1.97±0.56% (pelvis and abdomen), 2.27±0.24% (brain), 1.56±0.51% (nasopharynx), and 1.43±1.3% (breast). In addition, Gamma index criteria used to evaluate fluence dose was 3mm (distance-to-agreement) and 3% (dose-difference) with 90% passed rate. Overall, the results, found in this study, shows that a lateral shift of the patient table resulted in an error beyond an acceptable tolerance if the table was shifted at more than 3mm. Gamma index criteria, then, is met if the lateral shift was within 3mm.
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)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (117.316 KB)

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.
Kuantisasi dan analisis citra computed radiography pada pemeriksaan sinus paranasal pasien pediatrik dengan metode line profile Sari Yuliani; Lukmanda Evan Lubis; Nurlely Nurlely; Djarwani Soeharso Soejoko
Journal of Medical Physics and Biophysics Vol 5, No 1 (2018)
Publisher : Indonesian Association of Physicists in Medicine (AIPM/AFISMI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1009.67 KB)

Abstract

Pada penelitian ini dilakukan pengujian dari metode line profile, suatu metode kuantisasi citra CR yang memiliki potensi penggunaan sebagai alat bantu bagi ahli radiologi dalam interpretasi citra radiologi. Metode line profile memberikan pertimbangan referensi kuantitatif tambahan dengan obyektivitas tinggi, serta mendeteksi abnormalitas yang mungkin tidak terlihat secara visual. Sampel berupa citra CR dari 45 pasien pediatrik dengan rentang usia 1-5 tahun, 5-10 tahun, dan 10-15 tahun dibagi berdasarkan anatomi yang dijadikan objek kuantisasi yaitu konka nasalis inferior, sinus maksilla, sinus frontal, sinus sphenoid, dan sinus ethmoid, dan dianalisa menggunakan metode line profile. Garis uji (line profile) dibuat dengan posisi dan ukuran tetap terhadap acuan berupa tulang (bony landmark) dengan menggunakan perangkat lunak ImageJ. dan kuantitatif; yakni membandingkan line profile pasien terdiagnosa abnormal dengan baseline dari line profile pasien terdiagnosa normal. Hasil penelitian menunjukkan bahwa secara kualitatif metode ini menunjukkan efektivitas untuk anatomi objek konka nasalis inferior, sinus maksilla, dan sinus frontal dengan kecocokan antara kuantisasi dan hasil diagnosa radiolog sebesar 82%, 81%, dan 100% berturut-turut.  Sedangkan secara kuantitatif metode ini efektif untuk objek sinus maksilla dan sinus frontal dengan tingkat kecocokan 89% pada sinus maksilla dan 50% pada sinus frontal.

Page 2 of 7 | Total Record : 69

 1   2   3   4   5 

Filter by Year

2014 2023


Reset
Filter By Issues
All Issue Vol 10, No 1 (2023) Vol 9, No 1 (2022) Vol 8, No 1 (2021) Vol 7, No 1 (2020) Vol 6, No 1 (2019) Vol 5, No 2 (2018) Vol 5, No 1 (2018) Vol 4, No 1 (2017) Vol 3, No 1 (2016) Vol 2, No 1 (2015) Vol 1, No 1 (2014): Inaugural Issue More Issue