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•
Attenuation is the most
important property for
medical imaging.
•
Differences in the number of
photons behind an
inhomogeneous absorber
create contrast.
Photons Attenuation - Radiography
Radiographic
image
m
=
m
(
E,Z
)
=> same E
m
lead
>
m
bone
>
m
softT
>
m
air