[Rtk-users] Help Regarding FDK reconstruction

[Simon Rit]

Dear Amjad,
I had a quick look at your dataset. For sure, it's a geometry problem. 
Do you have any information regarding the geometry? How did you obtain 
sdd / sid?
Currently, I can see that you have set the projections and the volume 
origin to 0,0,0 which is not correct, you probably want to center them 
for a first test. If you want to center them, the formula to compute the 
origin is -0.5*spacing*(size-1) for each corrdinate.
Simon

On 18/04/2016 08:50, AMJAD N wrote:
> Hi, The data set is reattached below,. Someone please look into it and 
> help me please,
>
> http://filenurse.com/download/bb2827a35cc99a14feee17d2c37cdf76.html
>
> Thanks in advance
> AMJAD
>
>
>     Message: 1
>     Date: Thu, 14 Apr 2016 17:21:12 +0530
>     From: AMJAD N <amjad.n.cet at gmail.com <mailto:amjad.n.cet at gmail.com>>
>     To: rtk-users at public.kitware.com <mailto:rtk-users at public.kitware.com>
>     Subject: [Rtk-users] Help Regarding FDK reconstruction
>     Message-ID:
>            
>     <CAHq1iunQyc-ZGRH7o6yrMtiwqnusAPnoKzRKPnxm5bpj_3b0+A at mail.gmail.com <mailto:CAHq1iunQyc-ZGRH7o6yrMtiwqnusAPnoKzRKPnxm5bpj_3b0%2BA at mail.gmail.com>>
>     Content-Type: text/plain; charset="utf-8"
>
>     Hi
>
>     I am new to RTK. and I have been looking into it for the past two
>     weeks..I
>     think its an amazing tool..
>
>     My problem is:
>
>
>     I have a set of 50 raw CT scan projections of an industrial fin as
>     shown
>     (fin.jpg)
>     I am reading it using ImageSeriesReader with RawimageIO and been have
>     trying to reconstruct it using FDKConeBeamReconstructionFilter.
>     Its been
>     almost a week that I am trying this,but
>     I could not reconstruct it correctly
>     I tried varying my geometry, origin, spacing etc ..but still no hope
>
>     Can u please look into my program(finRecon.txt) and the current
>     output I am
>     getting is output_fin.mha , which is incorrect and suggest some help
>
>      The link to my dataset:
>
>     http://expirebox.com/download/b523394ea63c635d10171a69e687993b.html
>
>     raw image dimensions : 1032 *1012
>     raw image                     16 bit
>     current spacing:            0.05 0.05 0.05
>     origin:                           0 0 0
>     step angle                     7.2 degrees
>
>
>     Thanks in advance,
>
>     AMJAD
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