Goals and motivation of the project

• feasibility of phase contrast on tubes with \(>100\) kVp
• typical environment for medical, security and material science applications
• characterize physical quantities

Outline

• special thanks to Gordan, Thomas and Tine
• technical studies
• evaluation of KIT gratings
• pilatus detector
• applications
• biomedical: cartilage
• biomedical: lungs
• materials: powders
• materials: cement hydration

KIT gratings with Maria

• various grating sets for 30 and 45 \(\pi\) shift
• short summary: gratings are ok, homogeneity and absorption thickness are the main concerns.
• \(\lt 100\) μm gold forces the smaller focal spot (1 mm)
• visibility averaging 8-10% for most sets
• best configuration reaching 15%

Best configuration

• 100 μm G0, 140 μm G2, \(\pi\) shift 45 keV
• eiger 1M detector
• 80 kVp, 1 mm focal spot

Conclusions for our fabrication team

• 80 μm G0, 140 μm G2, \(\pi\) shift 45 keV
• pilatus CdTe detector

• increasing from 80 to 100 μm is very significant
• this is also the very minimum absorption thickness for the setup