Table 2.

The mean SNR of the spectra and the mean Cramér-Rao Lower Bounds of the spectral fit for each metabolite and their standard deviations in the PAT and HC groups

	SNR	CRLB [%] NAA	CRLB [%] Cr	CRLB [%] Cho	CRLB [%] mI
PAT group	7 ± 1	5.6 ± 0.7	9.6 ± 1.5	10.4 ± 2.1	13.4 ± 3.5
HC group	7 ± 1	5.2 ± 0.9	9.4 ± 1.2	10.8 ± 1.8	13.5 ± 3.2

PAT: subjects with COVID-19 IgG antibodies > 22 kU/l or with positive SARS-CoV-2 qPCR test at least two months before the MR examination; HC: subjects with COVID-19 IgG < 22 kU/lmean; SNR: signal-to-noise ratio; CRLB: Cramér-Rao Lower Bounds of the spectral fit, NAA: total N-acetylaspartate; Cr: total creatine; Cho: choline-containing compounds; mI: myo-inositol