Taylan TUĞRUL

Examination of Dosimetric Verification of Prowess Panther Treatment Planning System Using Monte Carlo Method For Small Fields

Treatment planning systems (TPS) have an important role in the implementation of radiotherapy treatment. Quality control of TPS is extremely important in terms of treatment reliability. In this study, it was aimed to make quality control of TPS by comparing the data obtained from the PROWESS Panther TPS with the results of the Monte Carlo simulation for small fields. In this study, TPS used in the radiation oncology department was examined. For MC simulation, BEAMnrc and DOSXYZnrc codes were used in modeling and dose measurement of linear accelerator device. Gamma analysis method was used to compare measurement results. When we examine the gamma analysis for PDDs in the study, the gamma values obtained in the 3x3 cm2, 4x4 cm2 and 5x5 cm2 field sizes for the 3% and 3mm criterion provide this criterion for each measurement point. The fact that each dose point in the measurement field is less than 0.1 gamma value indicates that the dose profiles obtained in PROWESS Panther TPS are in good agreement with the MC results. The doses calculated by PROWESS Panther TPS were found within the reference limits. It can be concluded that the dose calculated by PROWESS Panther TPS in homogeneous environments is within acceptable limits for use in radiotherapy. Studies should also be carried out in non-homogeneous environments such as lung, bone and soft tissue in order to obtain more accurate results about PROWESS Panther TPS.

PDF

___

1. Toutaoui A, Ait chikh S, Khelassi-Toutaoui N, B Hattali. Monte Carlo photon beam modeling and commissioning for radiotherapy dose calculation algorithm. Physica Medica 2014; 30: 833-837.
2. Ahnesjö A, Aspradakis M M. Dose calculations for external photon beams in radiotherapy, Phys Med Biol 1999; 44: 99-155.
3. Aspradakis MM, Morrison RH, Richmond ND, Steele A. Experimental verification of convolution/superposition photon dose calculations for radiotherapy treatment planning. Phys Med Biol 2003; 48: 2873-2893.
4. Garcia-Vicente F, Minambres A, Jerez I, Modolell I, Torres J. Experimental validation tests of fast fourier transform convolution and multigrid superposition algorithms for dose calculation in low density media. Radiother Oncol 2003; 67: 239-249.
5. Verhaegen F, Seuntjens J. Monte Carlo modelling of external radiotherapy photon beams. Phys Med Biol 2003; 48: R107-R164.
6. Prowess Inc. Panther 3D Conformal Therapy, Accuracy, Simplicity and Ease of Use. MKT-1123C.
7. Prowess Inc. Panther OIS|R&V, Oncology Information System | Record and Verify. MKT-9300F.
8. Walters B, Kawrakow I, Rogers DWO. DOSXYZnrc User’smanual. NRCC Report PIRS-794revB. Ottawa: NRC; 2020.
9. Rogers DWO, Kawrakow I, Seuntjens JP, Walters B, Mainegra-Hing E. NRC user codes for EGSnrc. National Research Council of Canada Report PIRS-702 (rev C); 2017.
10. Tuğrul T, Eroğul O. Determination of initial electron parameters by means of Monte Carlo simulations for the Siemens Artiste Linac 6 MV photon beam. Reports of Practical Oncology and Radiotherapy 2019; 24: 331-337.
11. Tuğrul T, Eroğul O. Analysis of water-equivalent materials used during irradiation in the clinic with XCOM and BEAMnrc. Journal of Radiation Research and Applied Sciences 2020; 12: 455-459.
12. Tuğrul T. Modeling Of The Siemens Artiste Linear Accelerator Device With Using Monte Carlo Method And Evaluation Of Parameters Effecting To Energy. The PhD Thesis of TOBB University of Economics and Technology; 2020.
13. PTW Dosimetry Company., (2004). User Manual MEPHYSTO Toolbox, PTW-FREIBURG.
14. Reis CQM, Nicolucci P, Fortes SS, Silva LP. Effects of heterogeneities in dose distributions under nonreference conditions: Monte Carlo simulation vs dose calculation algorithms. Medical Dosimetry 2019; 44: 74-82.
15. Fogliata A, Vanetti E, Albers D, et al. On the dosimetric behaviour of photon dose calculation algorithms in the presence of simple geometric heterogeneities: comparison with Monte Carlo calculations. Phys. Med. Biol 2007; 52: 1363-1385.
16. Chełmiński K, Bulski W. A multi-centre analytical study of small field output factor calculations in radiotherapy. Physics and Imaging in Radiation Oncology 2018; 6: 1-4.
17. Aarup LR, Nahum AE, Zacharatou C, et al. The effect of different lung densities on the accuracy of various radiotherapy dose calculation methods: implications for tumour coverage. Radiother Oncol 2009; 91: 405-414.
18. Carrasco P, Jornet N, Kuch MA, et al. Comparison of dose calculation algorithms in phantoms with lung equivalent heterogeneities under conditions of lateral electronic disequilibrium. Med Phys 2004; 31: 2899-2911.
19. Tsuruta Y, Nakata M, Nakamura M, et al. Dosimetric comparison of Acuros XB, AAA and XVMC in stereotactic body radiotherapy for lung cancer. Med Phys 2014; 41: 081715.