Hyperspectral X-ray CT Scans of an Aluminium Phantom with Metal Powders

Two hyperspectral X-ray computed tomography projection datasets of a multi-phase phantom acquired in a laboratory micro-CT scanner. The phantom is an aluminium cylinder containing three distinct metal-based powders (CeO2, ZnO, Fe), with scans taken at 30-second and 180-second exposure times per projection. The data was produced by Ryan Warr at the University of Manchester's Henry Moseley X-ray Imaging Facility.

Use Cases

• Developing material decomposition algorithms based on the unique attenuation signals of CeO2, ZnO, and Fe powders.
• Testing hyperspectral CT reconstruction methods using the provided 4D sinogram data with 200 energy channels.
• Calibrating energy-sensitive X-ray detectors using the included energy axis conversion data.
• Studying the impact of exposure time on projection quality by comparing the 30-second and 180-second scan datasets.

Strengths

• Includes two complete, energy-resolved scan datasets with different exposure parameters (30s and 180s per projection).
• Provides all necessary files for reconstruction, including sinograms, flatfield data, and geometry specifications.
• Contains 200 energy channels per scan, enabling detailed spectral analysis.
• Features a phantom with three distinct materials (CeO2, ZnO, Fe), providing clear spectral markers for method validation.

Limitations

• Row count and dataset size are unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• A discontinuity is noted at projection 137 in the 180-second scan due to a scan interruption.

Provenance

Source

Henry Moseley X-ray Imaging Facility, The University of Manchester

Collection Method

Acquired using a custom-built laboratory micro-CT scanner with an energy-sensitive HEXITEC detector.