Tomographic X-Ray Data of 3D Emoji Phantoms with Sinograms and Measurement Matrices

A dataset of tomographic X-ray data for a phantom made of 33 emoji faces, containing 15 distinct designs. It includes X-ray sinograms for a single 2D slice, corresponding static and dynamic measurement matrices modeling the X-ray transform, and the original measured sinogram. The data was made available by Zenith Purisha of the University of Helsinki and is intended for scientific use with appropriate citation.

Use Cases

• Testing tomographic reconstruction algorithms based on the provided sinogram data.
• Benchmarking linear measurement models based on the included static and dynamic measurement matrices.
• Studying the effects of down-sampling and logarithmic transformation on sinogram data.
• Developing educational materials for computed tomography using a non-standard, recognizable phantom.

Strengths

• Includes both processed sinograms (down-sampled, log-transformed) and the original measured sinogram in its native resolution.
• Provides both static and dynamic measurement matrices modeling the X-ray transform operation.
• The phantom consists of 33 emoji faces representing 15 distinct designs, offering a structured test object.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and overall dataset size are unknown, which may limit suitability assessment.
• Last update date is unknown; freshness unverified.

Provenance

Source

University of Helsinki, Zenith Purisha

Collection Method

The data consists of measured 60-projection fan-beam sinograms of a physical phantom made from small squared ceramic stones, which were subsequently processed.