Chicken Bone CBCT Scans at Four X-Ray Dose Levels

A collection of 721 X-ray projection images per scan of a chicken leg bone, acquired using a cone-beam computed tomography scanner. The dataset includes four scans of the same sample, each taken with a different relative X-ray dose level (10%, 25%, 50%, 100%). It was produced by the Industrial Mathematics Computed Tomography Laboratory at the University of Helsinki.

Use Cases

• Developing low-dose CT reconstruction algorithms based on the four different dose levels.
• Training image denoising models for X-ray projections based on the paired high-dose and low-dose scans.
• Studying the impact of scan parameters like tube current and exposure time on image quality.
• Benchmarking geometric correction methods based on the noted center-of-rotation misalignment.

Strengths

• Includes four distinct scans of the same sample with precisely controlled dose levels (10%, 25%, 50%, 100%).
• Each scan comprises 721 high-resolution projection images (2240x2368 pixels).
• Detailed metadata files specify scan geometry, tube current, exposure time, and other parameters.
• Projection data has been corrected for dark current and flat-field effects.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• The scanner had a slight center-of-rotation misalignment, requiring post-processing correction.
• Row count is unknown, which may limit suitability assessment for large-scale training.

Provenance

Source

University of Helsinki, Industrial Mathematics Computed Tomography Laboratory

Collection Method

Scans were acquired using an in-house built cone-beam CT scanner with a molybdenum target X-ray tube and a flat panel detector.