A visibility optimization study for grating-based X-ray Phase Contrast Imaging

G P Kudielka,Kinan Mahdi,Jonathan I Sperl,D Beque,Cristina Cozzini

Nuclear Science Symposium and Medical Imaging Conference（2012）

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摘要

An X-ray phase contrast grating interferometer consists of three gratings in the beam line to generate interference patterns and acquire phase shift information if an object is placed into the beam. These gratings have a pitch of a few micrometers and therefore very accurate alignment is needed to acquire phase information reliably. In this work we have investigated different setup parameters and environmental influences on the detected signal quality by Six Sigma methods. We have used this information to optimize our setup and established a semi-automatic alignment procedure to reproduce a stable signal quality.

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关键词

x-ray apparatus,x-ray imaging,x-ray optics,diffraction gratings,light interferometers,optical signal detection,optimisation,six sigma (quality),visibility,x-ray phase contrast grating interferometer,beam line,grating-based x-ray phase contrast imaging,interference pattern generation,phase shift information acquisition,semiautomatic alignment procedure,signal detection quality,six sigma method,visibility optimization,x ray optics

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