Table 1.
SD of susceptibility value (ppm) | Volunteer | mSPGR | sSPGR | ||
---|---|---|---|---|---|
SS-TVV-NM | SS-TVV | SS-TVV-NM | SS-TVV | ||
WM | 1 | 0.038 | 0.042 | 0.029 | 0.074 |
2 | 0.037 | 0.045 | 0.034 | 0.057 | |
3 | 0.040 | 0.043 | 0.034 | 0.060 | |
4 | 0.038 | 0.045 | 0.035 | 0.057 | |
5 | 0.033 | 0.038 | 0.032 | 0.062 | |
CSF | 1 | 0.067 | 0.069 | 0.053 | 0.077 |
2 | 0.065 | 0.071 | 0.054 | 0.072 | |
3 | 0.079 | 0.082 | 0.061 | 0.076 | |
4 | 0.062 | 0.067 | 0.055 | 0.072 | |
5 | 0.071 | 0.074 | 0.058 | 0.080 | |
GM | 1 | 0.046 | 0.049 | 0.034 | 0.072 |
2 | 0.044 | 0.049 | 0.039 | 0.058 | |
3 | 0.051 | 0.052 | 0.041 | 0.061 | |
4 | 0.040 | 0.045 | 0.035 | 0.056 | |
5 | 0.042 | 0.045 | 0.036 | 0.061 |
mSPGR, multiple spoiled gradient echo sequence; SS-TVV-NM, single-step total variation with variable kernel size and norm minimization; WM, white matter; CSF, cerebrospinal fluid; GM, gray matter; SD, standard deviation; sSPGR, single-echo spoiled gradient echo sequence.