scholarly journals Verifying the accuracy of 3D-CRT dose distributions calculated by the Prowess Panther treatment planning system (TPS) with Monte Carlo (MC) simulation for head-and-neck (H&N) patients

2019 ◽  
Vol 3 (2) ◽  
pp. 90-99
Author(s):  
Luong Thi Oanh ◽  
Duong Thanh Tai ◽  
Hoang Duc Tuan ◽  
Truong Thi Hong Loan
Keyword(s):  
Monte Carlo ◽  
Head And Neck ◽  
Treatment Planning ◽  
Planning System ◽  
Treatment Planning System ◽  
Average Dose ◽  
Monte Carlo Code ◽  
Dose Distributions ◽  
Mc Simulation ◽  
3D Crt

The purpose of this study is to verify and compare the three Dimensional Conformal Radiation Therapy (3D-CRT) dose distributions calculated by the Prowess Panther treatment planning system (TPS) with Monte Carlo (MC) simulation for head-and-neck (H&N) patients. In this study, we used the EGSnrc Monte Carlo code which includes BEAMnrc and DOSXYZnrc programs. Firstly, the clinical 6 MV photon beams form Siemens Primus linear accelerator at Dong Nai General Hospital were simulated using the BEAMnrc. Secondly, the absorbed dose to patients treated by 3D-CRT was computed using the DOSXYZnrc. Finally, the simulated dose distributions were then compared with the ones calculated by the Fast Photon Effective algorithm on the TPS, using the relative dose error comparison and the gamma index using global methods implemented in PTW-VeriSoft with 3%/3 mm. There is a good agreement between the MC and TPS dose. The average gamma passing rates were 92.8% based on the 3%/3 mm. The average dose in the PTV agreed well between the TPS with 0.97% error. MC predict dose was higher than the mean dose to the parotid glands and spinal cord compared to TPS. We have implemented the EGSnrc-based Monte Carlo simulation to verify the 3D-CRT plans generated by Prowess Panther TPS. Our results showed that the TPS agreed with the one of MC.  

scholarly journals Dose distribution verification for GZP6 sources: A comparison of Monte Carlo, radiochromic film, and GZP6 treatment planning system

2012 ◽  
Vol 20 (1-2) ◽  
pp. 3-7 ◽  
Author(s):  
Bahreyni Toossi ◽  
Mahdi Ghorbani ◽  
Asghar Mowlavi ◽  
Abdolreza Hashemian ◽  
Soleimani Meigooni
Keyword(s):  
Monte Carlo ◽  
Treatment Planning ◽  
Radiochromic Film ◽  
Planning System ◽  
Treatment Planning System ◽  
Quality Assurance Program ◽  
Monte Carlo Code ◽  
Dose Calculations ◽  
Planning Systems ◽  
Dose Distributions

Background: Treatment planning systems (TPSs) are used for dose calculations in dose delivery by after loading brachytherapy machines. Such planning systems usually use simplified algorithms in their dose calculations. Verification of dose distributions produced by TPS is of clinical importance and is part of a quality assurance program. In this study, the dose distributions generated by GZP6 TPS for two GZP6 sources were verified. Methods: The evaluation was based on the inter comparisons between the isodose curves obtained through Monte Carlo simulations, radiochromic film measurements, and GZP6 treatment planning system. MCNPX Monte Carlo code was used to simulate the sources. Dose measurements were performed in a perspex phantom using Gafchromic? EBT radiochromic films. Comparisons between the results obtained from MC, RCF, and TPS were performed by gamma function calculations with 5% dose/2 mm distance criterion. Results: Based on gamma calculations our results showed that there was good agreement between the dose distributions obtained by the three aforementioned methods in both transverse and longitudinal planes for the GZP6 source No.2. However, for source No. 5, the agreement was good in the transverse plane but it was low in the longitudinal plane. Conclusion: The results showed that dose distributions certified by the GZP6 TPS for the GZP6 source No. 2 were validated. However, for source No. 5 some discrepancies were observed. Accurate knowledge of the activity of each active pellet in the source No. 5 can clarify the cause of the discrepancies.

Photon dose calculation of a three-dimensional treatment planning system compared to the Monte Carlo code BEAM

2000 ◽  
Vol 27 (7) ◽  
pp. 1579-1587 ◽  
Author(s):  
Paolo Francescon ◽  
Carlo Cavedon ◽  
Sonia Reccanello ◽  
Stefania Cora
Keyword(s):  
Monte Carlo ◽  
Treatment Planning ◽  
Three Dimensional ◽  
Dose Calculation ◽  
Planning System ◽  
Treatment Planning System ◽  
Monte Carlo Code ◽  
Photon Dose

A Monte Carlo Model for Independent Dose Verification in Serial Tomotherapy

2008 ◽  
Vol 7 (5) ◽  
pp. 385-391
Author(s):  
Vikren Sarkar ◽  
Sotirios Stathakis ◽  
Nikos Papanikolaou
Keyword(s):  
Monte Carlo ◽  
Head And Neck ◽  
Monte Carlo Model ◽  
Planning System ◽  
Treatment Planning System ◽  
Dose Verification ◽  
Dose Distributions ◽  
Arc Therapy ◽  
Treatment Plans ◽  
Very High

Due to the very high complexity of IMRT treatment plans, it is imperative to perform dose verification, preferably before patient delivery. The aim of this project is to develop a Monte-Carlo-based model to verify the final dose distributions of plans developed using the Peacock system (CORVUS Treatment Planning System and MIMiC collimator). The system delivers radiation through arc therapy and uses sinogram files to determine the state of each of the multileaf collimator leaves. In-house software was developed using Matlab to decode the sinograms and create blocklets that are used as input in an MCSIM model of the MIMiC collimator attached to a Varian Clinac 600C. After validating the model, a prostate and head and neck case were simulated. The CORVUS-predicted dose distributions were compared with the Monte Carlo dose distributions. As expected, the results agreed very closely for the homogeneous case of the prostate but there were large discrepancies observed for the more heterogeneous head and neck case.

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