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Development and validation of MCNPX-based Monte Carlo treatment plan verification system.

Jabbari I, Monadi S - J Med Phys (2015 Apr-Jun)

Bottom Line: In MCTPV several methods were applied in order to reduce the simulation time.The relative dose distribution of a clinical prostate conformal plan calculated by the MCTPV was compared with that of TiGRT planning system.The results showed well implementation of the beams configuration and patient information in this system.

View Article: PubMed Central - PubMed

Affiliation: Department of Nuclear Engineering, Faculty of Advanced Sciences and Technologies, University of Isfahan, Isfahan, Iran.

ABSTRACT
A Monte Carlo treatment plan verification (MCTPV) system was developed for clinical treatment plan verification (TPV), especially for the conformal and intensity-modulated radiotherapy (IMRT) plans. In the MCTPV, the MCNPX code was used for particle transport through the accelerator head and the patient body. MCTPV has an interface with TiGRT planning system and reads the information which is needed for Monte Carlo calculation transferred in digital image communications in medicine-radiation therapy (DICOM-RT) format. In MCTPV several methods were applied in order to reduce the simulation time. The relative dose distribution of a clinical prostate conformal plan calculated by the MCTPV was compared with that of TiGRT planning system. The results showed well implementation of the beams configuration and patient information in this system. For quantitative evaluation of MCTPV a two-dimensional (2D) diode array (MapCHECK2) and gamma index analysis were used. The gamma passing rate (3%/3 mm) of an IMRT plan was found to be 98.5% for total beams. Also, comparison of the measured and Monte Carlo calculated doses at several points inside an inhomogeneous phantom for 6- and 18-MV photon beams showed a good agreement (within 1.5%). The accuracy and timing results of MCTPV showed that MCTPV could be used very efficiently for additional assessment of complicated plans such as IMRT plan.

No MeSH data available.


Monte Carlo calculated dose distributions in the TiGRT QDV phantom for an 18-MV photon beam with 15 × 10 cm2 field sizes
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Related In: Results  -  Collection

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Figure 9: Monte Carlo calculated dose distributions in the TiGRT QDV phantom for an 18-MV photon beam with 15 × 10 cm2 field sizes

Mentions: Figure 9 shows the Monte Carlo calculated dose distribution of an 18-MV photon beam inside the TiGRT phantom which was used for comparing the calculated and measured absolute dose of several points of interest. The relative statistical errors on the Monte Carlo results were generally less than 0.5%. Table 4 shows the Monte Carlo calculated and measured doses for 6 and 18-MV photon beams of four points inside the phantom. As shown, good agreement between Monte Carlo calculated and measured doses (within 1.5%) was obtained for both energies.


Development and validation of MCNPX-based Monte Carlo treatment plan verification system.

Jabbari I, Monadi S - J Med Phys (2015 Apr-Jun)

Monte Carlo calculated dose distributions in the TiGRT QDV phantom for an 18-MV photon beam with 15 × 10 cm2 field sizes
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4478649&req=5

Figure 9: Monte Carlo calculated dose distributions in the TiGRT QDV phantom for an 18-MV photon beam with 15 × 10 cm2 field sizes
Mentions: Figure 9 shows the Monte Carlo calculated dose distribution of an 18-MV photon beam inside the TiGRT phantom which was used for comparing the calculated and measured absolute dose of several points of interest. The relative statistical errors on the Monte Carlo results were generally less than 0.5%. Table 4 shows the Monte Carlo calculated and measured doses for 6 and 18-MV photon beams of four points inside the phantom. As shown, good agreement between Monte Carlo calculated and measured doses (within 1.5%) was obtained for both energies.

Bottom Line: In MCTPV several methods were applied in order to reduce the simulation time.The relative dose distribution of a clinical prostate conformal plan calculated by the MCTPV was compared with that of TiGRT planning system.The results showed well implementation of the beams configuration and patient information in this system.

View Article: PubMed Central - PubMed

Affiliation: Department of Nuclear Engineering, Faculty of Advanced Sciences and Technologies, University of Isfahan, Isfahan, Iran.

ABSTRACT
A Monte Carlo treatment plan verification (MCTPV) system was developed for clinical treatment plan verification (TPV), especially for the conformal and intensity-modulated radiotherapy (IMRT) plans. In the MCTPV, the MCNPX code was used for particle transport through the accelerator head and the patient body. MCTPV has an interface with TiGRT planning system and reads the information which is needed for Monte Carlo calculation transferred in digital image communications in medicine-radiation therapy (DICOM-RT) format. In MCTPV several methods were applied in order to reduce the simulation time. The relative dose distribution of a clinical prostate conformal plan calculated by the MCTPV was compared with that of TiGRT planning system. The results showed well implementation of the beams configuration and patient information in this system. For quantitative evaluation of MCTPV a two-dimensional (2D) diode array (MapCHECK2) and gamma index analysis were used. The gamma passing rate (3%/3 mm) of an IMRT plan was found to be 98.5% for total beams. Also, comparison of the measured and Monte Carlo calculated doses at several points inside an inhomogeneous phantom for 6- and 18-MV photon beams showed a good agreement (within 1.5%). The accuracy and timing results of MCTPV showed that MCTPV could be used very efficiently for additional assessment of complicated plans such as IMRT plan.

No MeSH data available.