[Rtk-users] Help Regarding FDK reconstruction

[AMJAD N]

Sir,

I haven't created geometry.xml. My code and data-set are attached in the
previous discussion. Also parameters for generating geometry explained in
the same thread. I am working without creating geometry.xml but creating
geometry in the code itself.

Thanks and Regards,

AMJAD N

On Tue, Apr 19, 2016 at 3:56 PM, louie L <ghostcz at hotmail.com> wrote:

> 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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