[Rtk-users] Problem while creating a phantom

[Simon Rit]

Hi Vincent,
The RTK format for the description of phantom is not good. What happens is
that it expects one of three values (A, B or C) to be 0 so that he knows
the direction of the cylinder. I would suggest to switch to Fobild's format
which is now well handled by RTK in opinion. See
https://web.archive.org/web/20070611224909/http://www.imp.uni-erlangen.de/forbild/deutsch/results/drasim.html
>From the command line, switch to it with the --forbild flag.
Simon

On Thu, Dec 14, 2023 at 11:31 AM Vincent Libertiaux <vl at xris.eu> wrote:

> Hi RTK community,
>
> I am getting unexpected results (see attached picture) when designing a
> phantom.
>
> Here is my text file:
>
> [Box]   A=70   B=15    C=4 z=0,    x=0,    y=0,    beta=0, gray=1
> [Cylinder] A=0.8    B=15     C=0.8 z=0,    x=0,    y=0, beta=0,     gray=10
>
> And the command I use for drawing:
>
> rtkdrawgeometricphantom -o phantom.mha --phantomfile test.txt --spacing
> 0.139 --dimension 1000
>
> I am expecting a cylinder across my box, but as you can see on the
> attachment, the cylinder's radius decreases along its axis.
>
> Could someone please give me a clue on what I am doing wrong ?
>
> Many thanks,
>
> Vincent
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