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 <[email protected]> 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 <[email protected]> >> To: [email protected] >> Subject: [Rtk-users] Help Regarding FDK reconstruction >> Message-ID: >> < >> cahq1iunqyc-zgrh7o6yrmtiwqnusapnokzrkpnxm5bpj_3b...@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 >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: < >> http://public.kitware.com/pipermail/rtk-users/attachments/20160414/784c3452/attachment-0001.html >> > >> >> ------------------------------ >> >> Subject: Digest Footer >> >> _______________________________________________ >> Rtk-users mailing list >> [email protected] >> http://public.kitware.com/mailman/listinfo/rtk-users >> >> >> ------------------------------ >> >> End of Rtk-users Digest, Vol 44, Issue 3 >> **************************************** >> > > > > _______________________________________________ > Rtk-users mailing > [email protected]http://public.kitware.com/mailman/listinfo/rtk-users > > >
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