[Rtk-users] Help Regarding FDK reconstruction

[louie L]

Can you please send the geometry.xml?

Louie

Sent from my iOS 

> Am 19.04.2016 um 12:15 schrieb AMJAD N <amjad.n.cet at gmail.com>:
> 
> Sir,
> 
> sdd and sid is measured from the experiment setup.
> -0.5*spacing*(size-1) logic is applied and effect is same.
> 
> The parameters we know are described below. Please go through it and help me tackle this issue.
> 
> Number of projections: 50
> 
> Object size: 
> x = 9.924236 mm
> y = 8.3048 mm              
> z = 10.505572mm
> 
> Detector panel:
> flat panel : Width: 1032 px., Height: 1012 px.
> Width: 51.6mm Height: 50.6mm
> (Detector pixel pith: 0.05mm)
> 
> Source to Detector Distance = 459.154 mm
> Source to object axis distance = 95.331mm
> 
> Direction of rotation: clock-wise
> 
> Angle
> start: 0 degrees
> increment: 7.2 degrees
> total: 360 degrees
> 
> Thanks and Regards.
> AMJADN
> 
>> On Tue, Apr 19, 2016 at 11:32 AM, Simon Rit <simon.rit at creatis.insa-lyon.fr> wrote:
>> 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>
>>>> To: rtk-users at public.kitware.com
>>>> Subject: [Rtk-users] Help Regarding FDK reconstruction
>>>> Message-ID:
>>>>         <CAHq1iunQyc-ZGRH7o6yrMtiwqnusAPnoKzRKPnxm5bpj_3b0+A 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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