[Rtk-users] Short scan reconstruction problem - real projection images from Elekta XVI

[Simon Rit]

Hi,
Everything looks correct in what you did. What version of RTK did you use?
It looks like a bug in the angular weighting of the projections coming from
the discretization of the integral on the gantry angle. Could you send us a
copy of ElektaGeometry.xml and tell us what was the dimension of the
projections? We will look into it.
Thanks for the report,
Simon

On Tue, Sep 9, 2014 at 5:22 AM, Yang Kyun Park <theday79 at gmail.com> wrote:

> Hi all,
>
>
>
> I’ve been using RTK for a year and I appreciate for all the efforts being
> made by the developers.
>
>
>
> Even though I haven’t had any problem with full scan images (360 degree
> scan), I found that rtkfdk doesn’t work well with my short scan images
> obtained from our Elekta XVI system.
>
>
>
> I’ve used a command line such as:
>
> --geometry ElektaGeometry.xml --path his_file_dir --regexp ".*.his"
> --output rtkfdk_short_scan.mha --spacing 0.5,0.5,0.5 --dimension
> 512,200,512 --origin -127.9,29.5,-127.9 --hardware cuda
>
>
>
> The reconstructed image looked very weird, like a distorted 3D volume with
> very noisy patterns (as attached).
>
>
>
> Note that I didn’t change anything in the rtkfdk code and I believe that
> the software is automatically recognize the short scan when it is loading
> the geometry file(xml). (Please correct me if I was wrong.)
>
>
>
> Thank you for your help in advance.
>
>
>
> YangKyun
>
>
>
>
>
>
>
>
>
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