Table 1 Experimental parameters of the phase-contrast CT setup at two-pixel sizes
Experimental parameter | 3.25-μm pixel size | 0.65-μm pixel size |
|---|---|---|
Photon energy (keV) | 16 | 14 |
Field of view (mm) | 6.656 (horizontal) × 5(vertical) | 1.331 (horizontal) × 1.331 (vertical) |
Matrix size (pixels) | 2048 × 2048 | 2300 × 2300 |
Sample-to-detector distance (cm) | 28 | 16 |
Projection images | 1200 | 900 |
Exposure time per projection (ms) | 100 | 100 |
CT scanning time per specimen (min) | 15 | 18 |
of flat-field images | 10 | 8 |
of dark-field images | 5 | 5 |
