Soft x-ray tomoholography.

We demonstrate an x-ray imaging method that combines Fourier transform holography with tomography ('tomoholography') for threedimensional (3D) microscopic imaging. A 3D image of a diatom shell with a spatial resolution of 140 nm is presented. The experiment is realized by using a small gold sphere as the reference wave source for holographic imaging. This setup allows us to rotate the sample and to collect a number of 2D projections for tomography. [ABSTRACT FROM AUTHOR]