<div dir="ltr">Hello<br><br>I am newbie at RTK and tried to reconstruct 3D cbct dataset of a walnut(<a href="https://zenodo.org/record/6986012">https://zenodo.org/record/6986012</a>) using rtkfdk.exe but<br>result was not good.<br><br>The script I used is:<br><br>rtksimulatedgeometry --output="geometry.xml" --nproj=721 --arc=360.0 --sdd=553.74 --sid=230.66<div><br>rtkprojections --path "D:\CT projection\walnut" --output "projections.mha" --regexp .tif --newspacing 0.5</div><div>  <br>rtkfdk -p . -r projections.mha -o fdk.mha -g geometry.xml --spacing 0.05,0.05,0.05 --dimension=128,128,128 --neworigin -64.5,-64.5,0<br><br><br>Metadata describing the measurement geometry and settings for walnut projection dataset:<br><br>[GENERAL]<br>ProjectName=20201111_walnut_<br>Scanner=University of Helsinki Industrial Mathematics Computed Tomography Laboratory<br>Measurers=Alexander Meaney<br>Date=20201111<br>DateFormat=YYYYMMDD<br><br>[GEOMETRY]<br>GeometryType=Cone<br>DistanceSourceDetector=553.74<br>DistanceSourceOrigin=210.66<br>DistanceUnit=mm<br><br>[ACQUISITION]<br>NumberImages=721<br>AngleFirst=0<br>AngleInterval=0.5<br>AngleLast=360<br><br>[DETECTOR]<br>Detector=Hamamatsu Photonics C7942CA-22<br>DetectorType=EID<br>Binning=1x1<br>PixelSize=0.050<br>PixelSizeUnit=mm<br>ExposureTime=1000<br>ExposureTimeUnit=ms<br><br>[XRAY]<br>Tube=Oxford Instruments XTF5011<br>Target=Mo<br>Voltage=40<br>VoltageUnit=kV<br>Current=1.0<br>CurrentUnit=mA<br>XRayFilter=None<br>XRayFilterThickness=N/A<br>XRayFilterThicknessUnit=mm<br><br><br>The output data (fdk.mha) doesn't look very walnut when I open it in volview (<a href="https://volview.kitware.app/">https://volview.kitware.app/</a>).<br>Some of the parameters seem to be wrong, but I'm not sure where exactly the problem is.<br><br>I would appreciate it if you could tell me how to solve the problem.<br>Thank you in advance.<br><br>Ansalsax<br><br><br><br><br><br></div></div>