Table 1 Estimated resolution of the tomograms reconstructed with different numbers of projections and expected resolution according to Nyquist angular sampling. The FSC analysis was based on the half-bit criterion and was performed by processing two independent tomograms with double angular spacing

From: X-ray ptychographic computed tomography at 16 nm isotropic 3D resolution

Number of projections

Isotropic 3D resolution [nm]

Expected resolution [nm]

180

58.5

50

360

30.0

25

720

15.9

12.5