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Hi,<br>
If you want to move a volume around space and keep the same geometry
for the source and detector positions, the best is to modify the
origin of your itk image. I don't know what is the original file
format but with mhd files, you simply have to change the Offset
value in the mhd file.<br>
Good luck,<br>
Simon<br>
<br>
<div class="moz-cite-prefix">On 04/02/2016 00:25, Solomon Tang
wrote:<br>
</div>
<blockquote
cite="mid:CAEtJVBVo=ZtAzfLgjofnVgXVW3u1U04yoW8kFwsYCcHY5mvVEg@mail.gmail.com"
type="cite">
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<div style="font-size:12.8px">Dear rtk-users,</div>
<div style="font-size:12.8px"><br>
</div>
<div style="font-size:12.8px">I am having success with forward
projection and reconstruction of complete cases much like in
the example from the wiki. However, I am interested in
creating projections of cropped images. I took the 00.mha from
the example and cropped it. When I create the projection,
using rtkforwardprojections, the cropped projection rotates
around the isocenter of the original uncropped file around the
AP axis as expected.</div>
<div style="font-size:12.8px"><br>
</div>
<div style="font-size:12.8px">Is there a way to create a
projection of a cropped image such that the cropped projection
rotates around a newly centered AP axis?</div>
<div style="font-size:12.8px"><br>
</div>
<div style="font-size:12.8px">I am certain that the origin and
spacing values of the geometry are correct. I have tried
messing with the sid and the sdd values but they do not
influence the distance between the isocenter and the cropped
object.</div>
<div style="font-size:12.8px"><br>
</div>
<div style="font-size:12.8px">Thanks</div>
</div>
<br>
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