Limits...
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.


Related in: MedlinePlus

Relative dose distributions of the total beams of 18-MV IMRT plan in the middle plane of the MapCheck2 in which all beams delivered perpendicular to the MapCheck2 at the fixed SSD: (a) MapCheck2 measurement, (b) Monte Carlo calculated, and (c) overlaying of them
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4478649&req=5

Figure 8: Relative dose distributions of the total beams of 18-MV IMRT plan in the middle plane of the MapCheck2 in which all beams delivered perpendicular to the MapCheck2 at the fixed SSD: (a) MapCheck2 measurement, (b) Monte Carlo calculated, and (c) overlaying of them

Mentions: Figure 8 shows the calculated and measured relative dose distributions of an 18-MV prostate IMRT plan that was delivered to the phantom. The relative statistical errors on the Monte Carlo results were generally less than 0.5%. As it can be seen, good agreement between measurements and Monte Carlo was found.


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

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

Relative dose distributions of the total beams of 18-MV IMRT plan in the middle plane of the MapCheck2 in which all beams delivered perpendicular to the MapCheck2 at the fixed SSD: (a) MapCheck2 measurement, (b) Monte Carlo calculated, and (c) overlaying of them
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 8: Relative dose distributions of the total beams of 18-MV IMRT plan in the middle plane of the MapCheck2 in which all beams delivered perpendicular to the MapCheck2 at the fixed SSD: (a) MapCheck2 measurement, (b) Monte Carlo calculated, and (c) overlaying of them
Mentions: Figure 8 shows the calculated and measured relative dose distributions of an 18-MV prostate IMRT plan that was delivered to the phantom. The relative statistical errors on the Monte Carlo results were generally less than 0.5%. As it can be seen, good agreement between measurements and Monte Carlo was found.

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.


Related in: MedlinePlus