Table 3. Parameters used in the measurement of refractive index.
| Sample | X-ray energy (keV) | GratingSet | Effective pixel size(µm) | FOV(H×V)(mm×mm) | Steps | Projections | Measurement time (min) |
| Porcine | 35 | Type A | 48 | 24×24 | 5 | 600 | 35 |
| Piscine | 15 | Type B | 5.5 | 5.5×3.6 | 5 | 600 | 75 |
| Murine | 15 | Type B | 5.5 | 5.5×3.6 | 5 | 600 | 75 |
| Ranine | 25 | Type A | 23.4 | 23.4×15.4 | 3 | 900 | 25 |
| Newt | 15 | Type B | 5.5 | 5.5×3.6 | 5 | 600 | 75 |
FOV: Effective field of view of detector; Steps: Number of scanning steps of G2 in a period of the visibility curve to retrieve the phase shift; Projections: Number of projections acquired in 180 degrees rotation of a sample for X-ray phase contrast tomography.