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è
“
visual
”
inspection of star shot film
è
Quality indicated by multi-axial symmetry of
the star pattern
l
Radiosensitive film placed in plane of rotations
l
Sequence of narrow fields at different angles
l
Intersection of these fields forms a star-shaped
pattern
Central
“
Star
”
pattern
Depuydt et al. 2012 (Phys. Med. Biol. 57 (2012) 2997–3011)
8
O-ring stability