We present a review of different approaches and MRI sequences used for reducing metal associated artifacts to obtain clinically relevant information.We discuss a systematic approach to interpret MRI scans with metallic implants.
Metal associated artifacts arise due tothe differencein magnetic properties of the tissues in the body (muscle,
bone- that are diamagnetic and contain variable water protons) and metal (that are markedly paramagnetic or ferromagnetic and typically do not contain water protons). Types of metal associated artifacts Geometric Distortion The effect of the metal prosthesis in the magnetic field leads to geometric distortion,
that in the frequency encoding direction leads to...
Findings and procedure details
Systematic Approach to readMRI images with metal associated artifacts 1. Don’t Panic 2.
Look at the signal on two different planes If it seen on only one plane,
and not the other,
it might be artefactual. If it is seen on two planes,
it is more likely real.
(fig 3) 3 . Look at the signal on two different sequences Bright signal on STIR,
bright signal on T1 implies an artefact Bright signal on STIR,
dark signal on T1 implies real signal abnormality.
(Fig 3) 4.
If there is fluid around the...
Tips and tricks for acquisition anda consistentproblem solving approach helps in imaging. A systematic approach to interpretation of MRI scans with metal associated artifacts (including looking at two planes,
and looking at atleast two different image contasts) helps in finding the cause of symptoms. Lastly,
but not the least,
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