Tommi Heikkilä
Photography of the STEMPO device and different views (xy-, xz- and yz-planes) of the volume changing over time. Reconstructed with a variational method similar to the included 2D example.
The Spatio-TEmporal Motor-POwered (STEMPO) phantom is a physical phantom designed for collecting dynamic X-ray tomography data. The dynamic part of the phantom is computer controlled allowing for wide variety of different measurements and sampling setups to be used.
This data set can be appended with new data in the future. Current version (1.2.0) includes
- Static scan (2D and 3D geometry)
- Dynamic scan with 360 projections covering one rotation (2D and 3D geometry)
- Dynamic scan with 8×45 scans covering 8 rotations (2D and 3D geometry)
- Dynamic scan with 8×180 scans covering 8 rotations (2D and 3D geometry)
- Approximate ground truth obtained via interpolation (2D only)
- Example codes using FBP (filtered back-projection) and FDK (Feldkamp-Davis-Kress)
- Example code using variational methods and wavelet regularization on the 2D + time object.
- Example code using low-rank + sparse decompositon scheme and 2D wavelets.
The data is licensed under an open data license (CC BY 4.0) and it is hosted on Zenodo.
The data format is designed to be compatible with HelTomo Toolbox and ASTRA Toolbox.
Dataset:
https://doi.org/10.5281/zenodo.7081688
Detailed documentation:
arXiv:2209.12471 (preprint)