LinkedIn

 آمار

تعداد نشریات20
تعداد شماره‌ها1,113
تعداد مقالات10,208
تعداد مشاهده مقاله40,780,534
تعداد دریافت فایل اصل مقاله8,804,158
Gholami, M H, Sadeghi, M, Babapour Mofrad, F, Mohammadi, M. (1399). Comparison of the 2-D Dose Distribution Calculated by Planning System and Measured by Gafchromic Film Physical Dosimetry for 60Co and 192Ir Brachytherapy Sources. سامانه مدیریت نشریات علمی, 10(3), 299-306. doi: 10.31661/jbpe.v0i0.1912-1004
M H Gholami; M Sadeghi; F Babapour Mofrad; M Mohammadi. "Comparison of the 2-D Dose Distribution Calculated by Planning System and Measured by Gafchromic Film Physical Dosimetry for 60Co and 192Ir Brachytherapy Sources". سامانه مدیریت نشریات علمی, 10, 3, 1399, 299-306. doi: 10.31661/jbpe.v0i0.1912-1004
Gholami, M H, Sadeghi, M, Babapour Mofrad, F, Mohammadi, M. (1399). 'Comparison of the 2-D Dose Distribution Calculated by Planning System and Measured by Gafchromic Film Physical Dosimetry for 60Co and 192Ir Brachytherapy Sources', سامانه مدیریت نشریات علمی, 10(3), pp. 299-306. doi: 10.31661/jbpe.v0i0.1912-1004
Gholami, M H, Sadeghi, M, Babapour Mofrad, F, Mohammadi, M. Comparison of the 2-D Dose Distribution Calculated by Planning System and Measured by Gafchromic Film Physical Dosimetry for 60Co and 192Ir Brachytherapy Sources. سامانه مدیریت نشریات علمی, 1399; 10(3): 299-306. doi: 10.31661/jbpe.v0i0.1912-1004

Comparison of the 2-D Dose Distribution Calculated by Planning System and Measured by Gafchromic Film Physical Dosimetry for 60Co and 192Ir Brachytherapy Sources

Journal of Biomedical Physics and Engineering
مقاله 7، دوره 10، شماره 3، مرداد و شهریور 2020، صفحه 299-306    اصل مقاله (743.64 K)
نوع مقاله: Original Research
شناسه دیجیتال (DOI): 10.31661/jbpe.v0i0.1912-1004
نویسندگان
M H Gholami1؛ M Sadeghi* 2، 3؛ F Babapour Mofrad4؛ M Mohammadi5، 6
1MSc, Department of Medical Radiation Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
2PhD, Finetech in Medicine Research Center, Iran University of Medical Sciences, Tehran, Iran P.O. Box: 14155-6183, Tehran, Iran
3PhD, Medical Physics Department, School of Medicine, Iran University of Medical Sciences, P.O. Box: 14155-6183, Tehran, Iran
4PhD, Department of Medical Radiation Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
5PhD, Department of Medical Physics, Royal Adelaide Hospital, Adelaide, SA 5000 Australia
6PhD, School of Physical Sciences, the University of Adelaide, SA 5005 Australia
چکیده
Background: High Dose Rate (HDR) brachytherapy sources with high photon energy have been widely used in treating tumors. Dosimetric parameter of these brachytherapy sources should be determined according to the AAPM TG-43 recommendation. Gafchoromic films are reliable tools for this evaluation.
Objective: The aim of this study is to evaluate and compare dose accuracy of the two-brachytherapy sources in a dedicated phantom.
Material and Methods: In this analytical study, two common sources, including Cobalt and Iridium, were loaded into the dedicated phantom. The two-dimensional dose distribution around the source was calculated by TPS system for certain activities and geometries around the sources. Then, the experimental dose measured by Gafchromic film dosimetry was reported for different angles ranging from 0 to 180 degrees.
Results: The difference between calculated and measured doses was less than 6 percent (-5 to +6 percent) for all of the channels and angles. These errors are smaller and mainly more than zero (Dfilm>DTPS) for angles less than 20 and larger than 110 degrees. There is no statistically significant discrepancy in dose calculation by treatment planning system.
Conclusion: Although the estimated error in dose calculation is not significant, there is still an opportunity to increase the treatment precision. The correlation between the error and the angle should be considered in further plans of brachytherapy. The present study showed comparable errors compared to results of other research studies.
کلیدواژه‌ها
Brachytherapy؛ Film Dosimetry؛ Cobalt-60؛ Iridium-192
سایر فایل های مرتبط با مقاله
مراجع
  1. Chen HH, Kuo MT. Improving radiotherapy in cancer treatment: promises and challenges. Oncotarget. 2017;8(37):62742. doi: 10.18632/oncotarget.18409. PubMed PMID: 28977985. PubMed PMCID: PMC5617545.
  2. Vuong T, Devic S, Moftah B, Evans M, Podgorsak EB. High-dose-rate endorectal brachytherapy in the treatment of locally advanced rectal carcinoma: technical aspects. Brachytherapy. 2005;4(3):230-5. doi: 10.1016/j.brachy.2005.03.006.
  3. Devic S, Liang L, Tomic N, Bekerat H, Morcos M, Popovic M, Watson P, Aldelaijan S, Seuntjens J. Dose measurements nearby low energy electronic brachytherapy sources using radiochromic film. Physica Medica. 2019;64:40-4. doi: 10.1016/j.ejmp.2019.05.017.
  4. Van Der Veen J, Laenen A, Nuyts S. Modern radiotherapy techniques versus three-dimensional conformal radiotherapy for head and neck cancer. Cochrane Database of Systematic Reviews. 2017;(12):1-12. doi: 10.1002/14651858.CD012904.
  5. DeLaney TF, Chen GT, Mauceri TC, Munro III JJ, Hornicek FJ, Pedlow FX, Suit HD. Intraoperative dural irradiation by customized 192iridium and 90yttrium brachytherapy plaques. International Journal of Radiation Oncology Biology Physics. 2003;57(1):239-45. doi: 10.1016/S0360-3016(03)00505-4.
  6. Martin E, Sowards K, Wang B. Investigation of a source model for a new electronic brachytherapy tandem by film measurement. Journal of applied clinical medical physics. 2018;19(5):640-50. doi: 10.1002/acm2.12440.
  7. Wilkinson DA. High dose rate (HDR) brachytherapy quality assurance: a practical guide. Biomed Imaging Interv J. 2006;2(2):e34. doi: 10.2349/biij.2.2.e34.
  8. Meisberger LL, Keller RJ, Shalek RJ. The Effective Attenuation in Water of the Gamma Rays of Gold 198, Iridium 192, Cesium 137, Radium 226, and Cobalt 60. Radiology. 1968;90(5); 953-7. doi: 10.1148/90.5.953. PMID: 5643598.
  9. Leung TW, Tung SY, Sze WK, Sze WM, Wong VY, Sai-Ki O. Salvage brachytherapy for patients with locally persistent nasopharyngeal carcinoma. International Journal of Radiation Oncology Biology Physics. 2000;47(2):405-12. doi: 10.1016/S0360-3016(00)00463-6.
  10. Nath R, Anderson LL, Meli JA, Olch AJ, Stitt JA, Williamson JF. Code of practice for brachytherapy physics: report of the AAPM Radiation Therapy Committee Task Group No.56. Medical physics. 1997;24(10):1557-98.
  11. Zaman ZK, Ung NM, Malik RA, Ho GF, Phua VC, Jamalludin Z, Baharuldin MT, Ng KH. Comparison of planned and measured rectal dose in-vivo during high dose rate Cobalt-60 brachytherapy of cervical cancer. Physica Medica. 2014;30(8):980-4. doi: 10.1016/j.ejmp.2014.07.002.
  12. Kirisits C, Rivard MJ, Baltas D, Ballester F, De Brabandere M, Van Der Laarse R, Niatsetski Y, Papagiannis P, Hellebust TP, Perez-Calatayud J, Tanderup K. Review of clinical brachytherapy uncertainties: analysis guidelines of GEC-ESTRO and the AAPM. Radiotherapy and oncology. 2014;110(1):199-212. doi: 10.1016/j.radonc.2013.11.002.
  13. Luvizotto J. Characteristics of the radiochromic film Gafchromictm EBT3 model for use in brachytherapy. Brazil: INIS; 2015;47(10):1-103.
  14. Devic S. Radiochromic film dosimetry: past, present, and future. Physica medica. 2011;27(3):122-34. doi: 10.1016/j.ejmp.2010.10.001.
  15. Devic S, Tomic N, Lewis D. Reference radiochromic film dosimetry: review of technical aspects. Physica Medica. 2016;32(4):541-56. doi: 10.1016/j.ejmp.2016.02.008.
  16. Meigooni AS, Gearheart DM, Sowards K. Experimental determination of dosimetric characteristics of Best® brachytherapy source. Medical physics. 2000;27(9):2168-73. doi: 10.1118/1.1289256.
  17. Williamson JF. Comparison of measured and calculated dose rates in water near I-125 and Ir-192 seeds. Medical physics. 1991;18(4):776-86. doi: 10.1118/1.596631.
  18. Wallace RE, Fan JJ. Report on the dosimetry of a new design brachytherapy source. Medical physics. 1999;26(9):1925-31. doi: 10.1118/1.598737.
  19. Meigooni AS, Yoe-Sein MM, Al-Otoom AY, Sowards KT. Determination of the dosimetric characteristics of InterSource125 iodine brachytherapy source. Applied Radiation and Isotopes. 2002;56(4):589-99. doi: 10.1016/S0969-8043(01)00258-5.
  20. Rivard MJ, Coursey BM, DeWerd LA, Hanson WF, Saiful Huq M, Ibbott GS, et al. Update of AAPM Task Group No. 43 Report: A revised AAPM protocol for brachytherapy dose calculations. Medical physics. 2004;31(3):633-74. doi: 10.1118/1.1646040.
  21. Perez-Calatayud J, Ballester F, Das RK, DeWerd LA, Ibbott GS, Meigooni AS, et al. Dose calculation for photon-emitting brachytherapy sources with average energy higher than 50 keV: report of the AAPM and ESTRO. Medical physics. 2012;39(5):2904-29. doi: 10.1118/1.3703892.
  22. Ayoobian N, Asl AS, Poorbaygi H, Javanshir MR. Gafchromic film dosimetry of a new HDR brachytherapy source. Journal of applied clinical medical physics. 2016;17(2):194-205. doi: 10.1120/jacmp.v17i2.6005.
  23. Bastin KT, Podgorsak MB, Thomadsen BR. The transit dose component of high dose rate brachytherapy: direct measurements and clinical implications. International Journal of Radiation Oncology Biology Physics. 1993;26(4):695-702. doi: 10.1016/0360-3016(93)90291-3.
  24. Richter J, Baier K, Flentje M. Comparison of 60 Cobalt and 192 Iridium sources in high dose rate afterloading brachytherapy. Strahlentherapie und Onkologie. 2008;184(4):187-92. doi: 10.1007/s00066-008-1684-y.
آمار
تعداد مشاهده مقاله: 1,686
تعداد دریافت فایل اصل مقاله: 546


سامانه مدیریت نشریات علمی. قدرت گرفته از سیناوب