Which resolution do I get for the invested photon fluence?

What is it about?

We compared near- and far-field lensless x-ray imaging in terms of fluence-resolution efficiency, i.e. the resolution obtained in the reconstructed image as function of number of photons per pixel.

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Why is it important?

Putting less radiation on a sample reduces the radiation damage. Thus getting good images with as small as possible dose is very important (especially for radiation sensitive specimen).