ct_dual_energy_reconstruct — TOMOGRAPHY ct_scan op

• データ種: projstack × projstack × ctgeometry → table

• 呼び出し: import fullseye as fs; fs.ledger.ct_dual_energy_reconstruct(proj_low, proj_high, geometry, mu_low=(1.0, 0.4), mu_high=(0.6, 0.3), method='fdk', device='auto', **options) (実装を直接呼ぶなら import ctscan; ctscan.ct_dual_energy_reconstruct(proj_low, proj_high, geometry, mu_low=(1.0, 0.4), mu_high=(0.6, 0.3), method='fdk', device='auto', **options)、台帳から引くなら opstomography.get("ct_dual_energy_reconstruct"))

• GPU: なし(CPU 参照実装のみ)

使い方

Two scans of one geometry to two basis-material volumes.

At each detector sample the two line integrals are two linear equations in the two material path lengths, L = M t (Alvarez & Macovski 1976). The system is solved in the projection domain, where beam hardening has not yet been smeared across the volume, and each material is reconstructed on its own. *mu_low* and *mu_high* are effective attenuation coefficients; for a polychromatic beam, call dualxray.basis_material_decompose per view first and reconstruct its output.

The noise of the two path lengths grows with the condition number of M, which is returned.

:param proj_low: (view, V, U) line integrals of the low-energy scan. :param proj_high: the high-energy scan, same shape. :param geometry: dict from ct_scan_geometry. :param mu_low: attenuation of the two basis materials at the low energy. :param mu_high: attenuation of the two basis materials at the high energy. :param method: "fdk", "sirt", "os_sart" or "tv". :param device: "auto", "cpu" or "cuda". :param options: passed to the reconstruction. :returns: dict with basis_0 and basis_1 (path-length densities, volumes),

and condition.

:raises ValueError: on mismatched shapes or a singular matrix. Empty input

(proj_low with 0 elements) raises ValueError.

参考(サンプルデータ・文献)

• サンプルデータ カタログ(DL URL / ライセンス) — 2-D は skimage.data(BSD/public)+ 合成、3-D は実データ源(Stanford/PDS 等)の DL URL。

• 演算子の来歴・参考文献 — この op 族の元になった研究/手法の出典。

• アルゴリズムの正典(著者・年)と用途は上記ファミリ使い方ガイドに記載。

実行できる例(この op を実際に呼ぶ検証済みサンプル)

• (まだありません)

型が繋がる次の op(table を入力に取れる)

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同カテゴリ(ct_scan)

ct_scan_geometry · shepp_logan_3d · ellipsoid_phantom · ellipsoid_projections · ct_forward_project · ct_adjoint_project · fdk_reconstruct · sirt_reconstruct

*Provenance: ctscan.py — TOMOGRAPHY operator registry. この per-op ノートは tools/opdocs.py md が自動生成(手編集しない)。*

© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.