Crowther criterion

The conventional method to evaluate the resolution of a tomography reconstruction is determined by the Crowther criterion.^{[1] [2]} The minimum number of views, ${\displaystyle m}$, to reconstruct a particle of diameter ${\displaystyle D}$ to a resolution of ${\displaystyle d}$ is given by

${\displaystyle m=\pi {\frac {D}{d}},}$

where ${\displaystyle d=1/R}$, with ${\displaystyle R}$ the reciprocal space radius corresponding to the maximum meaningfully filled frequency in Fourier space.