spectral_xray op• Data kinds: pairs → table
• Call: import fullseye as fs; fs.ledger.xray_beam_quality(spectrum, material: 'str' = 'AL') -> 'dict' (to call the implementation directly, import dualxray; dualxray.xray_beam_quality(spectrum, material: 'str' = 'AL') -> 'dict'; from the registry, opstomography.get("xray_beam_quality"))
Beam quality of a spectrum: first and second half-value layers, homogeneity coefficient, mean energy and effective energy.
> The detailed description below is the original text — the summary and the headings are translated.
半価層は空気カーマが半分になる吸収体の厚さ(線量計で測る量の定義どおり):
K(x) ∝ Σ φ(E) E (μ_en/ρ)_air(E) e^{−μ(E) x}。HVL₁ は K(x) = K(0)/2、HVL₂ は K(x) = K(0)/4 から HVL₁ を引いたもの、均等度 = HVL₁/HVL₂(単色なら 1)。実効エネルギーは単色で同じ HVL₁ を与えるエネルギー(μ(E_eff) = ln 2/HVL₁)。material は吸収体(既定 Al、Cu も使う)。
返り値: dict(hvl1_mm, hvl2_mm, homogeneity, mean_energy_kev(光子数の平均), effective_energy_kev, material)。公表の線質(IEC 61267 の RQA 系列など)と比べる量。
• 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.
• poc_dual_energy_xray — py -3.11 examples/poc_dual_energy_xray.py
table as input)—
spectral_xray)material_xray_table · material_xray_attenuation · material_xray_constants · material_effective_z · xray_tube_spectrum · photon_counting_channels · dual_kvp_channels · xray_channel_projection
*Provenance: dualxray.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.