274 / 1228
MRI
B /Ai d fi iti
•
one r e n on poor
•
Must have compatible catheters and applicators
M till
d CT t t l
li ti
ay s nee
o ge oca za on
Issue with prosthesis and dental work
•
No electron density (might not be an issue for high energy
brachytherapy,
192
Ir and over)
•
Distortions: non-homogeneity of main magnetic field across
the volume, spatial non-linearity of gradients.
•
Voxel size and proton density: related to strength of signals
•
Partial volume effect
•
Chemical-shift artefacts; Motion artefacts; Field of view
artefacts; RF artefacts