Table 4. Relationship between artifacts and imaging sequence.

MRI sequence	Magnitude of artifact	Reason
Long echo time; GRE sequences	Most severe artifacts (loss of signal around the material) [8]	Intravoxel dephasing is the predominant cause of signal loss, resulting in a dark or black area around the metal on processed images [48,49].
Shortened echo time and decreased voxel size; SE sequence [49,50]	Best sequence for reducing the severity of susceptibility artifacts (complex spear-shaped artifacts) [8]	Diminished phase shifts in voxel caused by local static magnetic field gradients [80].

MRI, magnetic resonance imaging; GRE, gradient echo; SE, spin-echo.