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Hi Andreas,<br>
I am really grateful that you've found time to response so quickly.<br>
<br>
1) Following your suggestions I first checked the spacing. I
suppose, you refer to the value of 0.03840368. I am confident, this
is the correct value in the correct unit (mm). <br>
The 4D Slicer shows the dimensions in mm and this is near to the
object measures.<br>
<br>
2) The second try was to check if the " -o fdk.raw" works. <br>
Unfortunately not, I get such exception:<br>
itk::ImageFileWriterException (000000C71D4FE5D0)<br>
Location: "void __cdecl itk::ImageFileWriter<class
itk::Image<float,3> >::Write(void)"<br>
File:
d:\reconstruction_rtk\itk\modules\io\imagebase\include\itkImageFileWriter.hxx<br>
Line: 151<br>
Description: Could not create IO object for writing file fdk.raw<br>
Tried to create one of the following:<br>
NiftiImageIO<br>
NrrdImageIO<br>
GiplImageIO<br>
HDF5ImageIO<br>
JPEGImageIO<br>
BMPImageIO<br>
LSMImageIO<br>
PNGImageIO<br>
TIFFImageIO<br>
VTKImageIO<br>
StimulateImageIO<br>
BioRadImageIO<br>
MetaImageIO<br>
MRCImageIO<br>
GE4ImageIO<br>
GE5ImageIO<br>
HndImageIO<br>
XimImageIO<br>
HisImageIO<br>
ImagXImageIO<br>
DCMImagXImageIO<br>
EdfImageIO<br>
XRadImageIO<br>
OraImageIO<br>
GDCMImageIO<br>
You probably failed to set a file suffix, or<br>
set the suffix to an unsupported type.<br>
<br>
<br>
3) Regarding the "--origin argument" and refering to my context (see
attached files please), what would you suggest, what should I pass
as the origin values? The detecetor origin is at 0,0 but for the
Volume I am not quit sure if I should provide some values and which
(actually isocenter should be at 0,0,0 and if I provide these values
I still get no result ). Probably this would solve my problem. <br>
<br>
Again, many thanks for your time and thank you for your help.<br>
<br>
Best regards,<br>
Milan<br>
<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">Am 20.08.2018 um 14:26 schrieb Andreas
Andersen:<br>
</div>
<blockquote type="cite"
cite="mid:CAE0aawGFd+W52wSaRp4Gp8vs1LyYkQ06tScCm8S95pfiJ4-CEw@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<div dir="ltr">Hi Milan
<div><br>
</div>
<div>I didn't open the dropbox link, but I think in general one
should take an extra look at the rtkfdk arguments if nothing
"meaningful" comes out:</div>
Is your spacing in the correct unit (mm)? it seems quite small
in relation to the dimensions.
<div> Also try adding the --origin argument.</div>
<div><br>
</div>
<div>Additional 1:</div>
<div>Slicer is a good tool for exactly that. </div>
<div>( I have also made a similar tool with some reconstruction
options, mainly for scatter correction: <a
href="https://gitlab.com/agravgaard/cbctrecon/wikis/Installation"
moz-do-not-send="true">cbctrecon</a> )</div>
<div>Additional 2:</div>
<div>try giving " -o fdk.raw" instead of "-o fdk.mha", the
default output value type is 32-bit floating point.</div>
<div><br>
</div>
<div>Best regards</div>
<div> Andreas</div>
<div>
<div>
<div dir="ltr" class="gmail_signature">
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<p style="margin-bottom:0.0001pt"><span
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style="color:rgb(31,73,125)" lang="EN-US"><span
style="font-size:11pt;line-height:16.8667px;font-family:Calibri,sans-serif"
lang="EN-US">Andreas Gravgaard Andersen</span></span></p>
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<p style="margin:0cm 0cm
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<br>
<div class="gmail_quote">
<div dir="ltr">On Sun, 19 Aug 2018 at 23:44, Milan Manasijevic
<<a href="mailto:milan-manasijevic@t-online.de"
moz-do-not-send="true">milan-manasijevic@t-online.de</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hi
RTK-users,<br>
<br>
I am trying to reconstruct a sample scanned using the CBCT.
Rtk seems to <br>
be the best chioce for that, but unfortenately I have no
success.<br>
Hopefully, some of you guys can help.<br>
<br>
The outcome of the scanning are 2500 projections (each
2024x2024 pixels).<br>
The increasement of the rotation angle is 0.144 degree<br>
To reduce the reconstruction time I use just 79 projection
images and <br>
angle increasement is 4.608 degree.<br>
<br>
The data regarding the scanning process are (test.pca,
test.pcj and <br>
test.pcr) dropped <br>
here:<a
href="https://www.dropbox.com/sh/on7c049aqx5ep1r/AAA7THDCkIHPF_9DBRl7MwROa?dl=0"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://www.dropbox.com/sh/on7c049aqx5ep1r/AAA7THDCkIHPF_9DBRl7MwROa?dl=0</a><br>
<br>
From these three files I have the following values required
for the <br>
reconstruction:<br>
[Geometry]<br>
FDD=940.59570922<br>
FOD=180.61168750<br>
VoxelSizeX=0.03840368<br>
VoxelSizeY=0.03840368<br>
<br>
[VolumeData]<br>
Volume_SizeX=421<br>
Volume_SizeY=533<br>
Volume_SizeZ=471<br>
<br>
[Detector]<br>
PixelsizeX=0.20000000<br>
PixelsizeY=0.20000000<br>
NrPixelsX=2024<br>
NrPixelsY=2024<br>
<br>
Finally, these are commands that I used to reconstruct the
volume:<br>
<br>
==========================================================================================================================================<br>
rtksimulatedgeometry --output="geometry.xml" --nproj=79
--arc=364.032 <br>
--sdd=940.59570922 --sid=180.611687 --source_y=-16.412937<br>
rtkprojections --path "d:\data\test\tiffs" --output
"projections.mha" <br>
--regexp .tif --newspacing 0.2<br>
rtkfdk -p . -r projections.mha -o fdk.mha -g geometry.xml <br>
--spacing=0.03840368,0.03840368,0.03840368
--dimension=421,533,471<br>
==========================================================================================================================================<br>
<br>
I use the VV, the 4D Slicer to check the results fro both, <br>
projections.mha and fdk.mha. The first one looks fine and
shows tha <br>
sample correctly, but fdk.mha does not show any meaningfull
information.<br>
The jpgs that show that, you can also find in the dropbox.<br>
<br>
Probably, I need to include the ROI values given in the
test.pcr file <br>
but I am not sure how. Would that be the neworigin value. (I
have tried <br>
but no success).<br>
<br>
Any help on that is highly appreciated!<br>
<br>
<br>
In addition I would have another two questions:<br>
1. Can anyone advice a proper tool to check the reconstruction
result <br>
(the reconstructed volume)?<br>
2. I am using the Voreen (<a
href="https://www.uni-muenster.de/Voreen/" rel="noreferrer"
target="_blank" moz-do-not-send="true">https://www.uni-muenster.de/Voreen/</a>)
and would <br>
rather have the reconstruction result in a raw file format
(containing <br>
intensities as a 32-Bit floats). How can I convert mha into
raw? (I <br>
tried to split the mha into mhd and raw, but no success)<br>
<br>
Best Regards,<br>
Milan<br>
<br>
<br>
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</blockquote>
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</blockquote>
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