Dear Mahmoudreza,
the code considers the average density to describe particle transport ("how far is the next interaction?"), but it considers
the local density to describe the interaction itself ("how much dose is deposited?"). If you want both the interaction distance and
the interaction to be described correctly, you need both MATERIAL and MAT-PROP as shown in the example of the Manual.
Alberto
________________________________________
From: mrakbari2015_at_ast.ui.ac.ir <mrakbari2015_at_ast.ui.ac.ir>
Sent: Saturday, February 2, 2019 7:17 PM
To: Fasso, Alberto
Cc: fluka-discuss_at_fluka.org; Vasilis.Vlachoudis_at_cern.ch
Subject: Re: [fluka-discuss]: which publication of ICRP has reported the lung density equal to 1.05 g/cm3
Dear Dr. Fasso
Thanks indeed for your instant reply. if we enter lung(ICRP) with the density of 1.05 g/cm3 from flair material data library to the input file and do not define MAT-PROP, does the code consider the 0.3 g/cm3 average density for the lung automatically? I mean for defining the lung with 0.3 g/cm3 average density, is it necessary to define MAT-PROP card in the input file?
Best Wishes,
Quoting "Fasso, Alberto" <fasso_at_slac.stanford.edu<mailto:fasso_at_slac.stanford.edu>>:
Dear Mahmoudreza,
lung has a local density larger than its average density, due to its alveolar structure.
Look at the FLUKA manual, option MAT-PROP. Example 2 shows how to define a local density of Lung (1.05 g/cm3) with command
MATERIAL, as well as an average density (0.3 g/cm3) by means of option MAT-PROP.
Alberto
________________________________________
From: owner-fluka-discuss_at_mi.infn.it<mailto:owner-fluka-discuss_at_mi.infn.it> <owner-fluka-discuss_at_mi.infn.it<mailto:owner-fluka-discuss_at_mi.infn.it>> on behalf of mrakbari2015_at_ast.ui.ac.ir<mailto:mrakbari2015_at_ast.ui.ac.ir> <mrakbari2015_at_ast.ui.ac.ir<mailto:mrakbari2015_at_ast.ui.ac.ir>>
Sent: Friday, February 1, 2019 8:56 PM
To: fluka-discuss_at_fluka.org<mailto:fluka-discuss_at_fluka.org>; Vasilis.Vlachoudis_at_cern.ch<mailto:Vasilis.Vlachoudis_at_cern.ch>
Subject: [fluka-discuss]: which publication of ICRP has reported the lung density equal to 1.05 g/cm3
Dear FLUKA experts
During the lung tissue simulation, I encountered to 1.05 g/cm3 for lung tissue densiy in the flair material data library?
In which publication of the ICRP this value was reported? isn't it too high for lung? 0.26 g/cm3 would be a proper choise?
however, lung tumor (GTV/ITV)might have the same density as 1.05 g/cm3.
Best wishes,
Mahmoudreza Akbari
Ph.D. Candidate in Medical Radiation Engineering
Department of Nuclear Engineering,
Faculty of Advanced Sciences and Technologies,
University of Isfahan, Isfahan, Iran.
Alternative Email: mrakbari2012_at_gmail.com<mailto:mrakbari2012_at_gmail.com>
Tel: 0098-09304403165
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Received on Sun Feb 03 2019 - 11:13:57 CET