Dera Alberto, Dera Andrej,
first of all thank you Alberto for answering.
About the discussion list, Andrej is subscribed to fluka-discuss with the
e-mail that he provided at registration, that is
andrej.sipaj.fl_at_ait.ac.at
Messages from other accounts (andrej.sipaj_at_ait.ac.at for instance) are not
accepted by the list.
This is also a reminder for other users who might have several addresses
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Regards
Paola
> Dear Andrej,
>
> I am sorry that your email to the discussion list was not published
> (I wonder why). But your question is correct and could interest other
> users,
> therefore I send it again to the discussion list, hoping it will work
> this time, together with my answer.
> You are right: there was a mistake in the manual, that we corrected a few
> weeks ago without informing the users. The correction will appear in the
> next FLUKA release, but I am giving it to you here below.
>
> In Example 2 of command MAT-PROP, instead of:
> * Average density of lung is 1.05*0.286 = 0.3 g/cm3.
> MAT-PROP 0.0 0.286 75.3 LUNG 0. 0.
>
> we should have written:
> * Local density of lung is 1.05 = 0.3*3.50 g/cm3
> MAT-PROP 0.0 3.50 75.3 LUNG 0. 0.
>
> In other words, instead of the correct multiplying factor 3.50, we had
> written in the example its inverse 1/3.50 = 0.286
>
> Apologies
>
> Alberto
>
>
> On Tue, 31 Mar 2015, Sipaj Andrej wrote:
>
>> Dear Giuseppe and Alberto,
>>
>> I am very sorry write to you directly but I sent email to FLUKA
>> discussion
>> forum on Friday last week but my question about "dose in lungs (sponge
>> like
>> material) of different densities" was never published. Therefore, I
>> would like
>> to kindly ask you if you could help to answer it or publish it on the
>> forum. I
>> can resend the topic again but I don't want to spam the forum email.
>>
>> Thank you very much for your help and time,
>> Andrej
>>
>> -----Original Message-----
>> From: Sipaj Andrej
>> Sent: Freitag, 27. März 2015 16:03
>> To: 'fluka-discuss_at_fluka.org'
>> Subject: Dose simulation for lungs (sponge like material) of different
>> densities
>>
>> Dear FLUKA experts,
>>
>> I am trying to simulate dose to lungs and surrounding tissue during
>> conventional therapy treatments. I am using example from the FLUKA
>> manual for material definition of ICRU lungs including MAT-PROP and
>> STERNHE (http://www.fluka.org/fluka.php?id=man_onl&sub=51 , Example 2).
>>
>> However, when I am changing the average lung density (0.2, 0.3, 0.4
>> g/cm3) due to breathing by the use of RHOR in MAT-PROP card and keeping
>> the same local density RHO (=1.05 g/cm3) in MATERIAL card with same
>> input, I am not noticing any differences in dose or energy absorption.
>>
>> Average lung density 0.2 g/cm3 = 1.05 * 0.190,
>> MAT-PROP 0.190 75.3 LUNG
>> STERNHEI 3.4708 0.2261 2.8001 0.08588 3.5353
>> LUNG
>>
>> Average lung density 0.3 g/cm3 = 1.05 * 0.286
>> MAT-PROP 0.286 75.3 LUNG
>> STERNHEI 3.4708 0.2261 2.8001 0.08588 3.5353
>> LUNG
>>
>> Output from total energy and dose absorbed in lungs
>> Average lung density 0.2 g/cm3: ENERGY: 1.1657E-03 DOSE: 1.1102E-03
>> Average lung density 0.3 g/cm3: ENERGY: 1.1657E-03 DOSE: 1.1102E-03
>>
>> Therefore, I would like to ask you if you could explain how to change
>> correctly the average density of the lungs for different breathing
>> phases (density 0.2, 0.3, 0.4 g/cm3) please. Simplified FLUKA runs of
>> this problem are included in the attachment.
>>
>> Thank you very much,
>> Andrej
>>
>> --------
>> AIT Austrian Institute of Technology GmbH Donau-City-Strasse 1 | 1220
>> Vienna | Austria T +43(0) 50550-4306 | M +43(0) 669 17358884 | F
>> +43(0) 50550-2136 andrej.sipaj_at_ait.ac.at | http://www.ait.ac.at
Paola Sala
INFN Milano
tel. Milano +39-0250317374
tel. CERN +41-227679148
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Received on Tue Mar 31 2015 - 18:14:07 CEST