Metal Artifact Minimization Sequences                   (12/00)

PulseSeq	TR	TE	Flip	BW	Matrix	Slice	SAT	NEX	FOV	Other
Cor SSFSE	na	180	na	31	256x160	6 x 0	None	.5	40x40
Ax SSFSE	na	180	na	31	256x160	6 x 0	None	.5	32x24
Ax SSFSE	na	80	na	31	256x160	6 x 0	None	.5	32x24
Sag FSPGR	min	min	90°	16	256x128	20 x 0	None	1	32x32	For Timing Bolus
Liver/Abd: Cor efgre3D	min	min	15°	62	256x160	6 x 0	None	1	32x24	Pre/post x2; SliceZip
MRA: Cor efgre3D	min	min	40°	62	256x160	3 x 0	None	1	32x32	Pre/post x2; SliceZip
Ax FMPSPGR	20	min	30°	31	256x160	7 x 0	Fat	1	24x24	Breathhold

Artifact is minimized by using the shortest possible TE, highest bandwidth and avoiding fat suppression whenever possible. By increasing NEX from 0.5 to 1.0, the TE for efgre3D is decreased because less of the echo is sampled. The technique least sensitive to metal is SSFSE, because the 180 degree refocusing pulses are so close together.

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