volume op• Data kinds: sinostack → voxel
• Call: import tomography; tomography.fbp_volume(stack, angles_deg=None, size=None, filter_name='ramp', cutoff=1.0, span_deg=None) (or opstomography.get("fbp_volume"))
Reconstruct every sinogram of a `(Z, A, D) stack -> a (Z, S, S)` volume.
The inverse of :func:radon_volume, slice by slice. The result is a plain
volume and every existing 3-D operator applies to it directly — windowing,
labelling, boundary extraction, marching cubes — which is the point of
returning `voxel` rather than something tomography-specific.
One number worth carrying into that pipeline: the reconstructed slice grid is
isotropic in-plane only. The slice spacing is whatever the scan used, and
it is usually coarser; the volume itself does not carry it. Passing this
volume to a measurement without its spacing is the most common way a
tomographic volume becomes a wrong number — see
`examples/tomography_reconstruct.py`, which measures the size of the error.
:param stack: `(Z, n_angles, n_detectors)`.
:param angles_deg: view angles; `None -> uniform [0, 180)`.
:param size: output side per slice; `None` -> the inscribed square.
:param filter_name: one of :data:FILTERS.
:param cutoff: fraction of Nyquist to keep.
:param span_deg: angular range for the `d(theta)` weight.
:returns: `(Z, size, size)` float64 volume.
:raises ValueError: on a non-3-D stack, or an output over
:data:MAX_STACK_ELEMENTS.
• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).
• Operator provenance and references — the sources of the research/methods this op family came from.
• The canonical algorithm (author, year) and its uses are named in the family usage guide above.
• tomography_reconstruct — py -3.11 examples/tomography_reconstruct.py
voxel as input)volume)*Provenance: tomography.py — TOMOGRAPHY operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.