An<unk>  is a visual<unk>  (an anomaly seen during visual representation) in magnetic resonance imaging <unk> . It is a feature appearing in an image that is not present in the original object. Many different<unk> s can occur during<unk> , some affecting the diagnostic quality, while others may be confused with pathology.<unk> s can be classified as patient-related, signal processing-dependent and hardware (machine)-related.
MRI artifact
Grain entrapment
Intraarticular fracture
Abscess
Pica 
Tendon rupture
Capsular contracture
Side strain