Imaging for deep brain stimulation: The zona incerta at 7 Tesla

Table 2 Image quality in terms of artifacts at the level of the zona incerta

Sequence	Consensus of two readers
T1-GRE tra	5.00 ± 0.00
T1-GRE-cor	5.00 ± 0.00
T1-GRE sag	5.00 ± 0.00
T2-TSE tra	4.78 ± 0.43
FLASH2D-T2Star tra	3.94 ± 0.54
FLASH2D-T2Star cor	3.94 ± 0.73
FLASH2D-T2Star sag	3.94 ± 0.64
SWI tra	2.92 ± 0.62
SWI cor	2.79 ± 0.43
SWI sag	3.00 ± 0.39
SWI-MIP tra	2.57 ± 0.51
SWI-MIP cor	2.64 ± 0.50
SWI-MIP sag	2.57 ± 0.51

Image quality in terms of artifacts at the level of the zona incerta was evaluated for each sequence by consensus of two radiologists using a 6-scale grading system (5: no artifacts; 4: minimal artifacts; 3: moderate artifacts; 2: significant artifacts; 1: massive artifacts; 0: no image/not evaluable). T1-GRE: T1-weighted gradient-echo; T2-TSE: T2-turbo spin-echo; SWI: Susceptibility-weighted imaging; MIP: Minimum intensity projections transversal; tra: Transversal; cor: Coronal; sag: Sagittal.