Imaging parameters of each PXCT tomogram, detailing the field of view (FOV; horizontal and vertical), step size of the Fermat spiral scan, the number of projections and total data collection time, as well as the reconstruction pixel size and the 3-dimensional resolution estimate by Fourier shell correlation (FSC) using the 1/2 bit threshold.
| Sample | FOV (H × V μm) | Step size (μm) | Projections | Time (h) | Pixel size (nm) | 3D FSC (1/2 bit; nm) |
|---|---|---|---|---|---|---|
| Recent | 13 × 6 | 0.6 | 820 | 15 | 12.12 | 18 |
| 10-year | 13 × 6 | 0.7 | 870 | 18 | 20.27 | 24 |
| 35-year | 15 × 6 | 0.6 | 700 | 13.2 | 15.3 | 35 |
| Mary | 10 × 5 | 0.6 | 480 | 6 | 15.3 | 30 |
| Bishop | 12 × 6 | 0.6 | 400 | 6.8 | 15.3 | 39 |
| Nicolaus | 10 × 5 | 0.6 | 800 | 9.8 | 15.3 | 19 |
| Nicolaus Border | 12 × 10 | 0.6 | 548 | 14.3 | 15.3 | 36 |
| Au reference | 6 × 6 | 0.6 | 160 | 1.7 | 15.3 | — |