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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 5 Documents
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Search results for , issue "Vol 2, No 1 (2015)" : 5 Documents clear
Sensitivity of the Absorbance and Capacitance Methods in Measurement the Number of Cells In-vivo Musaddiq Musbach
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 (449.462 KB)

Abstract

Have been carried out measurement of the number of cells in vivo by using two methods, namely measuring the absorbance using spectrophotometer and the capacitance of the liquid capacitor is designed himself. The results of both experiments suggests that the capacitance method is more sensitive and transparent  than the absorbance  method  at once proves that it could only be used for a limited range of cell numbers. In contrast, the capacitance method could be used for more wider range of cell numbers.
Mean Glandular Dose and CDMAM Phantom Image Quality for Siemens Mammomat Inspiration Hanna Vita Paulana; Kristina Tri Wigati; Djarwani Soeharso Soejoko
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 (756.335 KB)

Abstract

In performing breast screening, a mammography must be capable of imaging microcalcifications with the smallest possible size. However, the mean glandular dose (MGD) should not exceed the recommended limits. To achieve the goal then the utilization of target/filter combination should be adjusted to the thickness of the breast. The evaluation of image quality against variations in target/filter combinations can be done by using CDMAM phantom. There are two methods of CDMAM phantom image quality assessment, and the digital method is considered superior to the manual one. In addition to the evaluation of image quality, MGD received by the phantom was also calculated by multiplying the air kerma value at each thickness with the air kerma conversion factor into MGD. The calculation of MGD follow the equation and convertion factor that published by IAEA Human Health Series No. 17 – Quality Assurance Programme for Digital Mammography, then being compared with three another publication. The best image quality for the phantom thickness below 32 mm achieved by using Mo/Mo target/filter combination, meanwhile for the fantom thickness above 45 mm achieved by using Mo/Rh.
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

Organ and Effective Doses from A Multidetector Computed Tomography in Chest Examination Ratirat Puekpuang; Sivalee Suriyapee; Taweap Sanghangthum; Sornjarod Oonsiri; Puntiwa Insang
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

The growth of Multidetector Computed Tomography (MDCT) associated with the large number of images per examination offers many clinical benefits. It is easy to use for radiologist and physician, and these reasons are the cause of increasing exposure for populations rapidly. Organ and effective doses from CT examination are the important quantities to assess radiation risk. The objective of this study is to calculate the organ and effective doses from patient data. The beam data was collected for 30 cases of patient over 20 years old underwent 64 slices GE VCT MDCT scanner in the chest examinations. The computed tomography dose index (CTDI) values were measured in air and in body phantom with SOLIDOSE ionization chamber then the CTDI values and the exposed parameters were entered in ImPACT CT Patient Dosimetry Calculator version 1.0 for calculation of organ and effective doses. The exposure parameters of chest protocol were 120 kVp, 330 mA, 0.6 sec rotation time, and 1.375 pitch. The average scan length was 34.9 cm for the range of 23.1 to 56.5 cm. The high organ doses in the irradiated field occurred in lung, breast, esophagus, heart, stomach, liver, adrenal gland, kidney, pancreas, spleen and small intestine, the maximum dose ranged from 15 to 23.0 mGy. The average effective dose was 8.6 mSv with the range of 5.7 to 13.0 mSv.  The maximum number of scan series of examination was three which made the maximum effective dose of 39.0 mSv. The scan length was one of the variable factors that made the higher organ and effective doses in CT examination. The more series of examination was another factor to increase the organ and effective doses. The estimated radiation risk for cancer and hereditary effect for chest CT examination was about 5 cases for 10,000 populations. This study has shown that the CT doses used in clinical practice are not higher than commonly report but the careful used of radiation must be considered. Estimated organ and effective doses in chest MDCT scanning are a guide line for radiologists and physicians in order to judge the frequency of scan and suitable scan length. Keywords: organ dose, effective dose, Computed Tomography Dose Index, Multidetector Computed Tomography
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

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