Table 1.

Spectral quality in terms of fitted volume percentage, mean metabolite concentrations averaged over all voxels of white matter brain tissue in parietal lobe, and signal-to-noise ratio (SNR) for 3D EPSI reconstructed using full k-space, GRAPPA, and central k-space data.

Data	Acquisition	Fitted Volume (%)	NAA	Cre	Cho	SNR
Normal	Full k-space	72.5+3.15	591±36.6	348±22.9	99±8.1	22.5±2.82
(Group1)	Acq-GRAPPA	71.5+2.89	595±37.9	346±23.9	100±9.7	16.7±2.78
	Sim-GRAPPA	72.0+2.97	592±38.2	341±25.4	97±9.1	17.0±2.14
	Central k-space	65.7+2.66	588±39.0	347±26.0	98±9.9	21.5±3.11
Normal	Full k-space	71.7+2.35	585±35.6	338±23.9	97±9.6	20.0±2.39
(Group2)	Sim-GRAPPA	69.1+2.44	591±35.2	343±23.6	99±9.0	14.7±2.08
	Central k-space	68.6+2.46	589±37.1	342±24.2	98±9.6	19.0±2.74
mTBI	Full k-space	64.3+3.35	577±42.5	357±26.4	110±11.1	18.7±1.48
	Sim-GRAPPA	65.5+2.63	585±39.4	360±28.1	111±11.7	15.1±1.39
	Central k-space	65.6+2.36	584±39.6	359±25.7	110±11.0	18.5±1.71