Holotomography versus X-ray grating interferometry: A comparative study

I. Zanette (1, 2) , S. Lang (3) , A. Rack (1) , M. Dominietto (4) , M. Langer (5) , F. Pfeiffer (2) , T. Weitkamp (6) , B. Müller (3)

1 ESRF - European Synchrotron Radiation Facility
2 Physics Department
3 Biomaterials Science Center
4 IBT - Institute for Biomedical Engineering [ETH Zürich]
5 Imagerie Tomographique et Radiothérapie
6 SSOLEIL - Synchrotron SOLEIL

X-ray phase-contrast imaging techniques are used at synchrotron facilities to visualize tiny density variations in bulk samples. They overcome the limitations of other non-destructive methods, which often provide insufficient spatial and/or density resolution. Holotomography (HT) and X-ray grating interferometry (XGI) are among the most powerful phase-contrast techniques. Here, we show a direct comparison of HT versus XGI. We find that XGI excels in fidelity of the density measurements and is more robust against low-frequency artifacts, while HT is superior in spatial resolution. This study gives indications for applications and developments of phase-contrast imaging.

Domaines: Imagerie

I. Zanette, S. Lang, A. Rack, M. Dominietto, M. Langer, et al.. Holotomography versus X-ray grating interferometry: A comparative study. Japanese Journal of Applied Physics, part 2 : Letters, 2013, 103 (24), pp.244105. ⟨10.1063/1.4848595⟩. ⟨hal-01123835⟩