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Zabihzadeh, Mansour, Rahimi, Azizollah, Shahbazian, Hodjatollah, Razmjoo, Sasan, Mahdavi, Seyyed Rabie. (1400). Accuracy Evaluation of EPL and ETAR Algorithms in the Treatment Planning Systems using CIRS Thorax Phantom. سامانه مدیریت نشریات علمی, 11(4), 483-496. doi: 10.31661/jbpe.v0i0.1097
Mansour Zabihzadeh; Azizollah Rahimi; Hodjatollah Shahbazian; Sasan Razmjoo; Seyyed Rabie Mahdavi. "Accuracy Evaluation of EPL and ETAR Algorithms in the Treatment Planning Systems using CIRS Thorax Phantom". سامانه مدیریت نشریات علمی, 11, 4, 1400, 483-496. doi: 10.31661/jbpe.v0i0.1097
Zabihzadeh, Mansour, Rahimi, Azizollah, Shahbazian, Hodjatollah, Razmjoo, Sasan, Mahdavi, Seyyed Rabie. (1400). 'Accuracy Evaluation of EPL and ETAR Algorithms in the Treatment Planning Systems using CIRS Thorax Phantom', سامانه مدیریت نشریات علمی, 11(4), pp. 483-496. doi: 10.31661/jbpe.v0i0.1097
Zabihzadeh, Mansour, Rahimi, Azizollah, Shahbazian, Hodjatollah, Razmjoo, Sasan, Mahdavi, Seyyed Rabie. Accuracy Evaluation of EPL and ETAR Algorithms in the Treatment Planning Systems using CIRS Thorax Phantom. سامانه مدیریت نشریات علمی, 1400; 11(4): 483-496. doi: 10.31661/jbpe.v0i0.1097

Accuracy Evaluation of EPL and ETAR Algorithms in the Treatment Planning Systems using CIRS Thorax Phantom

Journal of Biomedical Physics and Engineering
مقاله 9، دوره 11، شماره 4، آبان 2021، صفحه 483-496    اصل مقاله (1.07 M)
نوع مقاله: Original Research
شناسه دیجیتال (DOI): 10.31661/jbpe.v0i0.1097
نویسندگان
Mansour Zabihzadeh1، 2؛ Azizollah Rahimi* 1، 3؛ Hodjatollah Shahbazian4؛ Sasan Razmjoo4؛ Seyyed Rabie Mahdavi5
1PhD, Department of Medical Physics, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
2PhD, Department of Clinical Oncology, Faculty of Medicine, Golestan Hospital, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
3PhD, Department of Radiology, Paramedical school, Hamadan University of Medical Sciences, Hamadan, Iran
4MD, Department of Clinical Oncology, Faculty of Medicine, Golestan Hospital, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
5PhD, Department of Medical Physics, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
چکیده
Background: It is recommended for each set of radiation data and algorithm that subtle deliberation is done regarding dose calculation accuracy. Knowing the errors in dose calculation for each treatment plan will result in an accurate estimate of the actual dose achieved by the tumor.
Objective: This study aims to evaluate the equivalent path length (EPL) and equivalent tissue air ratio (ETAR) algorithms in radiation dose calculation.
Material and Methods: In this experimental study, the TEC-DOC 1583 guideline was used. Measurements and calculations were obtained for each algorithm at specific points in thorax CIRS phantom for 6 and 18 MVs and results were compared.
Results: In the EPL, calculations were in agreement with measurements for 27 points and differences between them ranged from 0.1% to 10.4% at 6 MV. The calculations were in agreement with measurements for 21 points and differences between them ranged from 0.4% to 13% at 18 MV. In ETAR, calculations were also in consistent with measurements for 21 points, and differences between them ranged from 0.1% to 9% at 6 MV. Moreover, for 18 MV, the calculations were in agreement with measurements for 17 points and differences between them ranged from 0% to 11%.
Conclusion: For the EPL algorithm, more dose points were in consistent with acceptance criteria. The errors in the ETAR were 1% to 2% less than the EPL. The greatest calculation error occurs in low-density lung tissue with inhomogeneities or in high-density bone. Errors were larger in shallow depths. The error in higher energy was more than low energy beam.
کلیدواژه‌ها
Algorithms؛ Dose Calculation Error؛ Lung Tissue؛ Inhomogeneities؛ Radiotherapy؛ Treatment Planning Systems؛ Radiation Dosage
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