2017 X-ray Tomography

CT Imaging

▶ Lab CT Scanner (GE Nanotom)

Reference

Lab CT

https://www.bakerhughesds.com/inspection-technologies/radiography-ct/x-ray-computed-tomography/phoenix-nanotom-m

Lecture Notes from Stampanoni at ETH Zürich

▶ Synchrotron X-ray Tomography (@TOMCAT Beamline)

Report: H Xu, et al. Subsecond dynamics of liquid water transport in polymer electrolyte fuel cells revealed by 4D X-ray Tomographic Microscopy. Granted SNF Project. 2019 [Link]

Setup

Synchrotron-based X-ray tomographic imaging

http://www.synchrotron-soleil.fr/Recherche/IPANEMA/methodessynchrotron

▶ Phase-Contrast CT Imaging (Paganin Phase Retrieval)

Report: H Xu, et al. Subsecond dynamics of liquid water transport in polymer electrolyte fuel cells revealed by 4D X-ray Tomographic Microscopy. Granted SNF Project. 2019 [Link]

Principle of Phase Contrast Imaging, taken from lecture notes of Prof. Stampanoni at ETH Zurich

Paganin phase contrast imaging compared to traditional absorption contrast imaging

▶ Fast (0.1s) CT Imaging (Updated Microscope)

Publication: M. Bührer, M. Stampanoni, F. Marone et al, "High numerical aperture macroscope optics for time-resolved experiments. J. Synchrotron. 2019.

Siemens Star Comparison of New and Old Microscope

▶ Continuous Fast 4D CT Imaging (Updated Slip Ring)

Report: H Xu, et al. Subsecond dynamics of liquid water transport in polymer electrolyte fuel cells revealed by 4D X-ray Tomographic Microscopy. Granted SNF Project. 2019 [Link]

Development of setups for continuous fast 4D CT imaging

Figure 9. In-plane X-ray tomographic slices show the time series water droplets fluctuation/formation case in a fuel cell channel. Difference image of wet and dry are shown in the bottom. The fuel cell was assembled with FB H23C6 GDL materials.

▶ Field-of-View Selection (4x, 13x, 26x Magnification)

Report: H Xu, et al. Subsecond dynamics of liquid water transport in polymer electrolyte fuel cells revealed by 4D X-ray Tomographic Microscopy. Granted SNF Project. 2019 [Link]

Comparison of Field-of-View for 4x, 13x and 26x magnification microscopes