Present and future capabilities of MCNP

Hendricks, John S.; Adams, K.J.; Booth, Thomas E.; Briesmeister, J.F.; Carter, L.L.; Cox, L. J.; Favorite, Jeffrey A.; Forster, Robert; McKinney, G.W.; Prael, R.E.

doi:10.1016/s0969-8043(00)00231-1

Cited by 27 publications

(12 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This approach allows appropriate contributions to each segment after the normal completion of the substep. 24,25 Boundary-crossing artifacts could potentially be larger if a finer scoring mesh with true surfaces is used. Hence, we recommend using MCNPX with the mesh tally for future work to calculate the 3D dose distribution around beta sources.…”

Section: Resultsmentioning

confidence: 99%

Dosimetry characterization of a 32P source wire used for intravascular brachytherapy with automated stepping

Mourtada¹,

Soares

Seltzer

et al. 2003

Med. Phys.

View full text Add to dashboard Cite

Depth-dose curve measurements and Monte Carlo simulations for a catheter-based 32P intravascular brachytherapy source wire are described. The measured dose rates were obtained using both radiochromic-dye film and an extrapolation chamber (EC). Calibrated radiochromic-dye films were irradiated at distances between 0.5 and 5 mm from the source axis in polystyrene phantoms, and scanned with high-resolution densitometers. Measurements with an automated EC with a 1 mm diameter collecting electrode were also performed at a distance of 2 mm from the source in polystyrene. The measured dose rates obtained from the film and EC were divided by the measured source activity to obtain measured values of dose rate per unit contained activity. Dosimetric calculations of the catheter-based 32P wire geometry were also obtained using several Monte Carlo codes (CYLTRAN, MCNP, PENELOPE, and EGS). The measured and calculated values of dose rate per unit contained activity are in good agreement (<10%) within the relevant treatment distances (1 to 4 mm). With carefully selected input parameters, the calculated depth-dose curves using these codes were within 5% at 4 mm depth. At greater depths the discrepancies between the codes increase. We discuss likely mechanisms for these differences.

show abstract

Section: Resultsmentioning

confidence: 99%

Dosimetry characterization of a 32P source wire used for intravascular brachytherapy with automated stepping

Mourtada¹,

Soares

Seltzer

et al. 2003

Med. Phys.

View full text Add to dashboard Cite

show abstract

“…It was later updated to include the ITS 3 use of the newer stopping powers and bremsstrahlung cross sections, becoming MCNP4B (Briesmeister, 1997). The current version is MCNP4C (Briesmeister, 2000;Hendricks et al, 2000). MCNP does include the relevant sampling for an emitting volume.…”

Section: Mcnpmentioning

confidence: 99%

Monte Carlo modeling for intravascular brachytherapy sources

Seltzer¹

2002

View full text Add to dashboard Cite

Guidant Corporation has been generous with information, helping in early comparisons of Monte Carlo calculations and more recently in discussions about possible modeling artifacts. Paul Bergstrom of NIST was of invaluable help in setting up and running the comparison calculations with the MCNP4C, EGS4, EGSnrc, and PENELOPE codes for this manuscript, on very short notice and with a very short deadline. And my thanks to John DeMarco and Dennis Schaart who provided pre-print material that helped in my better understanding of the MCNP code. 20 It can no doubt be argued that improved point-kernel models are possible. It would seem, however, that pointkernel approaches could not reproduce dose perturbations close to the interface separating two materials of significantly different atomic numbers, a situation not uncommon in these applications.

show abstract

“…Among the SMC codes used to simulate the interaction of radiation with matter, EGS [17], MCNP [18] and, more recently, PENELOPE [19] and GEANT [20] have been applied to radiology. The quality of the results provided by different simulation codes is directly linked with the accuracy of the transport model and implemented by libraries that contain the data associated with the cross section of particles transported [4].…”

Section: Penelope Simulation Codementioning

confidence: 99%