Operating system: Windows 7 Slicer version: 4.8.1 Expected behavior: 3D Slicer should show the exact number of slices as appear in a DICOM viewer Actual behavior: 3D Slicer shows extra (and I cannot find a “match” for some of the correct slices shown in DICOM) I am working with MRI data. When I …

3D Slicer reconstructs 3D volumes from the input 2D image slices and no reference is kept to 2D slice indexes. However, you may find that one of the voxel indexes that slicer displays in the Data Probe section in the lower-left corner correlate with DICOM slice index (most likely there will be an of…

Sorry, I don’t think I was clear enough in my previous post. When I import the DICOM data itself into 3D Slicer, the some problem arises as with the NIFTY data. I am comparing the 2D slices as shown in 3D slicer to the 2D slices as shown in a different DICOM viewer software. How does 3D Slicer decid…

[image] cphillips: Are they an exact match to the “real” slices, or no? You always see the real image. The coordinates (both the anatomical/patient coordinates and voxel coordinates) are also all real and correct. You may turn off interpolation (Volumes module / Display / Interpolate checkbox…

If I understand correctly, I think the request is for the spacing mode vtkMRMLSliceNode::PrescribedSliceSpacingMode (“manual spacing”) to automatically match the volume spacing along the corresponding axis.

Thank you, rotating to the volume axis really helped. The application is research (calculating the volume of stroke lesions). Would having interpolate on or off have a big difference on the accuracy in this case (I doubt it would…)?

Interpolation has no effect on anything but how smooth the image appears (if you see boundary of individual voxels or the transition is continuous). Slice step size is already the same as the volume spacing along the corresponding axis, but this step size is not used when you browse slices using th…

HI Lassoan, Thank you for the information. We are looking for the algorithm that this interpolation checkbox triggered. Is it linear or B-spline based interpolation? Is there code that we can refer to for this interpolation function? It looks like the interpolation dramatically increase the spatia…

It is linear interpolation, implemented in vtkImageReslice filter. Note that this interpolation does not increate resolution, it just displays the continuous signal reconstructed from samples (instead of showing discrete samples).

Thank you very much! How can we know the values of the reconstructed continuous signals? Yong

Slice Interpolation

Support

pieper (Steve Pieper (Isomics, Inc.)) May 11, 2018, 5:51pm 4

Slicer displays patient spact by default. Your images might have been acquired on a tilted plane, in which case you could see the discussion here (look for “Rotate to volume plane”)

Topic		Replies	Views
Axial and sagittal image mismatch in the 3D view Support dicom	1	284	May 12, 2023
Does Slicer use Interpolation when rendering DICOMs Support rendering	1	460	June 27, 2018
slicer resamples data by itself Support resample	5	318	June 17, 2022
DICOM viewer - non-volumetric images Support	4	362	February 19, 2021
Different voxels, but the same coordinate? Support dicom	8	315	January 15, 2021

Slice Interpolation

Related topics