Cone-Beam CT Dataset of a Seashell with 721 X-Ray Projections

721 X-ray projection images of a seashell were acquired using a custom-built cone-beam computed tomography scanner. The dataset includes metadata specifying scan geometry and parameters, plus photographs of the sample and setup. It was produced by the Inverse Problems research group at the University of Helsinki.

Use Cases

• Testing CT reconstruction algorithms based on the provided 721 projection images.
• Developing geometric calibration methods for CBCT scanners based on the detailed metadata and noted center-of-rotation misalignment.
• Benchmarking image correction techniques using the described dark current and flat-field correction procedures.

Strengths

• Includes 721 X-ray projection images with a 0.5-degree angle increment, providing dense angular sampling.
• Comprehensive metadata details scan geometry, X-ray source settings (50 kV, 1 mA), and detector exposure time (1000 ms).
• Provides sample photographs and notes on empirical correction for a known scanner misalignment.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• The sample is a single seashell of unknown species, limiting biological or comparative analysis.

Provenance

Source

University of Helsinki, Inverse Problems research group

Collection Method

Acquired using a custom in-house cone-beam CT scanner with a molybdenum target X-ray tube and a flat panel detector.