Sampling

NeSVoR learns an implicit representation of the underlying 3D volume. Therefore, after training a NeSVoR model, we can sample 3D volumes and 2D slices from it. (Use --output-moel in reconstruct command to specify the file to save the model.)

Sample volume

Upon training a NeSVoR model with the reconstruct command, you can sample a volume at arbitrary resolutions with the sample-volume command.

nesvor sample-volume \
    --output-volume volume.nii.gz \
    --input-model model.pt \
    --output-resolution 0.5

Sample slices

You may sample slices from the model using the sample-slices command. For each slice in <path-to-slices-folder>, the command simulates a slice from the NeSVoR model at the corresponding slice location.

nesvor sample-slices \
    --input-slices <path-to-slices-folder> \
    --input-model model.pt \
    --simulated-slices <path-to-save-simulated-slices>

For example, you can use sample-slices to simulate slices at the motion-corrected locations and evaluate the reconstruction results by comparing the input slices and the simulated slices.