Zeinali, Ahad, ganjgahi, samaneh, mollazade, Mikael. (1397). Evaluation of Three-dimensional Treatment Planning System (TPS) performance in dose calculation of virtual wedged fields using film dosimetry. , 15(Special Issue-12th. Iranian Congress of Medical Physics), 180-180. doi: 10.22038/ijmp.2018.12792
Ahad Zeinali; samaneh ganjgahi; Mikael mollazade. "Evaluation of Three-dimensional Treatment Planning System (TPS) performance in dose calculation of virtual wedged fields using film dosimetry". , 15, Special Issue-12th. Iranian Congress of Medical Physics, 1397, 180-180. doi: 10.22038/ijmp.2018.12792
Zeinali, Ahad, ganjgahi, samaneh, mollazade, Mikael. (1397). 'Evaluation of Three-dimensional Treatment Planning System (TPS) performance in dose calculation of virtual wedged fields using film dosimetry', , 15(Special Issue-12th. Iranian Congress of Medical Physics), pp. 180-180. doi: 10.22038/ijmp.2018.12792
Zeinali, Ahad, ganjgahi, samaneh, mollazade, Mikael. Evaluation of Three-dimensional Treatment Planning System (TPS) performance in dose calculation of virtual wedged fields using film dosimetry. , 1397; 15(Special Issue-12th. Iranian Congress of Medical Physics): 180-180. doi: 10.22038/ijmp.2018.12792

Evaluation of Three-dimensional Treatment Planning System (TPS) performance in dose calculation of virtual wedged fields using film dosimetry

Iranian Journal of Medical Physics
مقاله 180، دوره 15، Special Issue-12th. Iranian Congress of Medical Physics، بهمن و اسفند 2018، صفحه 180-180
نوع مقاله: Conference Proceedings
شناسه دیجیتال (DOI): 10.22038/ijmp.2018.12792
نویسندگان
Ahad Zeinali* 1؛ samaneh ganjgahi2؛ Mikael mollazade3
1PHD of Medical physics ، Department of medical physics، Faculty of medicine ،Urmia Medical Sciences University (UMSU)،
2MSC of Medical physics ،Department of medical physics ،Faculty of medicine ،Urmia Medical Sciences University (UMSU)، samanehbanoo@yahoo.com
3PHD of Medical physics ،Department of medical physics ،Faculty of medicine ،Urmia Medical Sciences University (UMSU)
چکیده
Introduction: Nowadays radiotherapy plays an important role in cancer treatment. Different radiotherapy techniques improvement emphasizes on using of the precise ، appropriate and useful algorithms. one of these techniques are wedged which is used in radiotherapy to compensate missing tissues and create a uniform dose distribution in tissues. The Siemens Artiste linear accelerator supports a virtual wedge ، that this wedge creates a dose distribution similar to a physical wedge without the use of any extra accessory and wedged profiles are produced moving collimator jaw during irradiation with a constant speed but varying the dose rate. In this study ، TPS performance is evaluated in virtual wedged fields by comparing the calculated and measured results.
Materials and Methods: The calculations were performed by the collapsed cone superposition algorithm based TPS for two tangent fields in anthropomorphic slab phantom using 15،̊ 30̊، 45̊، 60̊ virtual wedges for field size of 20 × 20 cm2 for 6 and 15 MV photon beams. Measurements were produced by Gafchromic EBT films and reading exposed films with scanner.
Results: Good agreement between the measured dose with film dosimetry and calculated dose with collapsed cone superposition algorithm based TPS with using virtual wedge in heterogeneous environment and different energies were found ، with the maximum difference not exceed 3 -5%. The increase in wedge angle due to increase in the difference between calculated and measured data.
Conclusion: : The results from this study showed that the accuracy of collapsed cone superposition algorithm based TPS used with the virtual wedges for two tangent fields is enough for the clinical usage under the studied experimental conditions.
کلیدواژه‌ها
virtual wedge؛ Treatment planning systems(TPS)؛ Gafchromic film film dosimetry
آمار
تعداد مشاهده مقاله: 693
دانشگاه علوم پزشکی مشهد
آمار
تعداد نشریات29
تعداد شماره‌ها2,324
تعداد مقالات24,864
تعداد مشاهده مقاله82,812,690
تعداد دریافت فایل اصل مقاله45,865,533
اخبار نشریات