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Visibility !!!
Know the tool you are using!
Material
P
lastic
T
itanium
S
teel
flexible
rigid
rigid
CT
MRI
US
field strength
(0.2T,1.5T,3T)
P
S
T
P
S
T
S
different
materials
in 3T MRI
Different materials scanned in 0.2 T open MRI
Plastic needles
Titanium needles
P
Steel
artefact of a titanium needle on CT
P
S
T
Ultrasound
Visibility of applicator in sectional imaging