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. Author manuscript; available in PMC: 2019 Dec 1.
Published in final edited form as: Magn Reson Med. 2018 May 13;80(6):2366–2373. doi: 10.1002/mrm.27340

Figure 3. SNR comparisons of two navigator methods at various TR.

Figure 3

(A) SNR of MR spectra with the OVS-localized navigator was compared to that with the PRESS-IRS navigator using SVS measurements on a solution phantom containing acetate and lactate. SNR was computed as a ratio of area under the acetate peak to the root mean square noise from a solution phantom containing of acetate and lactate. SVS parameters were: number of data points=512, BW=2000 Hz, number of averages=42, voxel size=3×3×3 cm3, and TE=35 ms. (B) Normalized SNR changes, (SNR–SNRno-nav)/SNRno-nav, were calculated in reference to SNR without any navigator to compare the impact of a navigator addition in the two methods.