COMPARISONS BETWEEN THE MODALITIES Artifacts

Artifacts

CT artifacts

1.     Beam hardening

2.     Ring artifacts

3.     Partial voluming

4.     Motion artifacts

5.     Aliasing

US artifacts

1.     Reverberation echoes -ring down

2.     Shadowing & enhancement

3.     Refraction artifacts

4.     Speed displacement

5.     Side and grating lobes

6.     Mirror imaging

MRI

1.     Machine artifacts

2.     Wrap around artifacts

3.     Motion artifacts

4.     Chemical shift

5.     K edge artifacts

6.     Susceptibility artifacts

7.     RF pulse artifacts

8.     RF coil artifacts

9.     Gradient field artifacts

10.  Partial volume artifact

11.  Ringing artifact