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Week 8 X-ray imgining (to solve weak attenuation (synchrotron x-rays…
Week 8 X-ray imgining
to solve weak attenuation
phase contrast x-ray imaging
introduce a distance between same and patient
increase distance will enhance edges
result in bright/dark fringe when there is an change in composition
sufficiently coherent light
synchrotron x-rays
characteristic
extremely bright/high flux
short exposure/fast image
high coherent
enable phase contrast
monochromatic
energy sensitive techniques
set-up
lead-lined room: hutch
x-ray shutter stops x-rays between images
ccd collect image
compact light source
high energy electron interact with low energy photon
challenge
dose
sensitive detector
efficient detectors
compact and lower cost
single-grating