Thursday 20 October 2011

Streak artifacts CT

Occurs in CT
Distortions or errors in the image due to presence or movements of objects of very high density, like metallic clip and coil used for aneurysms, metallic implants and contrast media.
Seen as radiating dense white Streaks.
Deteriorates image quality.
Subject information is lost
Pathological details lost.
Solutions :
Remove the offending object if possible.
Use a smoothing algorithm. e.g. Standard algorithm.
Radiating white streaks in right para sellar region due to metallic coil in situ used for right MCA aneurysm. 
MRI is strictly contraindicated.

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