سامانه مدیریت نشریات علمی دانشگاه علوم پزشکی مشهد

Abdulbaqi, Abdulrahman, Abdullah, Siham, Alabedi, Haydar, alazawy, nabaa, Al-Musawi, Mustafa, Heydar, Ahmed. (1400). The Effect of Total Fields' Area and Dose Distribution in Step and Shoot IMRT on Gamma Passing Rate Using OCTAVIUS 4D-1500 Detector Phantom. , 18(4), 226-231. doi: 10.22038/ijmp.2020.44712.1690
Abdulrahman Mohammed Abdulbaqi; Siham Sabah Abdullah; Haydar Hamza Alabedi; nabaa alazawy; Mustafa Jabbar Al-Musawi; Ahmed faris Heydar. "The Effect of Total Fields' Area and Dose Distribution in Step and Shoot IMRT on Gamma Passing Rate Using OCTAVIUS 4D-1500 Detector Phantom". , 18, 4, 1400, 226-231. doi: 10.22038/ijmp.2020.44712.1690
Abdulbaqi, Abdulrahman, Abdullah, Siham, Alabedi, Haydar, alazawy, nabaa, Al-Musawi, Mustafa, Heydar, Ahmed. (1400). 'The Effect of Total Fields' Area and Dose Distribution in Step and Shoot IMRT on Gamma Passing Rate Using OCTAVIUS 4D-1500 Detector Phantom', , 18(4), pp. 226-231. doi: 10.22038/ijmp.2020.44712.1690
Abdulbaqi, Abdulrahman, Abdullah, Siham, Alabedi, Haydar, alazawy, nabaa, Al-Musawi, Mustafa, Heydar, Ahmed. The Effect of Total Fields' Area and Dose Distribution in Step and Shoot IMRT on Gamma Passing Rate Using OCTAVIUS 4D-1500 Detector Phantom. , 1400; 18(4): 226-231. doi: 10.22038/ijmp.2020.44712.1690

The Effect of Total Fields' Area and Dose Distribution in Step and Shoot IMRT on Gamma Passing Rate Using OCTAVIUS 4D-1500 Detector Phantom

Iranian Journal of Medical Physics
مقاله 1، دوره 18، شماره 4، مهر و آبان 2021، صفحه 226-231    اصل مقاله (1.26 M)
نوع مقاله: Original Paper
شناسه دیجیتال (DOI): 10.22038/ijmp.2020.44712.1690
نویسندگان
Abdulrahman Mohammed Abdulbaqi1؛ Siham Sabah Abdullah2؛ Haydar Hamza Alabedi3؛ nabaa alazawy* 4؛ Mustafa Jabbar Al-Musawi5؛ Ahmed faris Heydar5
1Alamal National Hospital for Cancer Treatment, Baghdad, Iraq
2Department of phsiology and medical physics, college of medicine, Alnahrain university, Iraq
3Oncology Department, Baghdad University, Diwaniya, Iraq
4Al-Mansour University College, Medical Instrumentation Engineering Department, Baghdad, Iraq
5Physicist, Ministry of Health and Environment/Medical City, Baghdad Center for Radiotherapy and Nuclear Medicine, Baghdad, Iraq
چکیده
Introduction: Quality assurance is necessary for every IMRT plan.‎Octavius 4D-1500 detector phantom is ‎one of the new phantoms for ‎determining the treatment plan quality‎.‎ This study aimed to examine the IMRT plans using the ‎Octavius 4D-1500‎‏ ‏‎to determine if ‎it is a reliable, ‎dependable, and durable. 
Material and Methods: IMRT QA conducted for 30 cases: HN and pelvis. The Monaco TPS used for treatment planning. The treatment plans ‎were then applied ‎to the Octavius 4D-1500 phantom (virtually and actually), ‎‎the γ-index was calculated in VeriSoft program to evaluate the IMRT plans.
Results: Significant differences were observed between the ‎‎‎measured and calculated dose distributions for HN and pelvic plans, while the treatment ‎sites did not affect the GP rate. The results of the global Gp ‎ were higher than the local GP, ‎regardless of the study criteria. The ‎HN plans ‎showed a more significant difference ‎than the pelvic plans. The HN plans, ‎a ‎strong significant correlation was found between the total ‎fields’area and %GP in both global ‎‎and local analyses, while in the pelvic plans, there was only a significant association with the ‎local %GP.
Conclusion: The measured dose distributions significantly different from calculated distributions. The relationship between the ‎‎fields’ ‏‎ area ‎and ‎‎‎%GP was inverse. In the HN plans, a ‎significant correlation found between the total ‎‎fields’ ‎area ‎and %GP in both global and ‎local, while only local %GP in the pelvic plans was significant correlation. Overall, the Octavius 4D-1500 detector phantom ‎might be applicable for ‎assessing the QA of IMRT plans.
کلیدواژه‌ها
Gamma Passing Rate؛ Dose Distribution؛ Intensity Modulated Radiotherapy؛ Quality Assurance
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