Table 4. TRV values of the six combinations for cortical structure volume values with FreeSurfer.
| Brain structures | MPRAGE_20CH TRV (%), median (Q1, Q3) | MPRAGE_32CH TRV (%), median (Q1, Q3) | MEMPRAGE_20CH TRV (%), median (Q1, Q3) | MEMPRAGE_32CH TRV (%), median (Q1, Q3) | MP2RAGE_20CH TRV (%), median (Q1, Q3) | MP2RAGE_32CH TRV (%), median (Q1, Q3) | P value |
|---|---|---|---|---|---|---|---|
| Total cortical structures volume | 4.18** (1.83, 7.94) | 3.70 (1.69, 7.04) | 3.83 (1.74, 7.75) | 3.43* (1.58, 6.81) | 4.32** (1.99, 8.40) | 4.30** (1.92, 8.28) | <0.001 |
| L temporal middle (V) | 2.72 (1.01, 4.86) | 1.62* (0.41, 3.31) | 2.73 (0.79, 3.55) | 2.32 (1.05, 4.37) | 2.77 (1.27, 4.58) | 4.74** (1.69, 8.09) | 0.017 |
| R temporal middle (V) | 1.87 (0.98, 3.72) | 1.64* (0.76, 2.32) | 1.96 (1.04, 2.59) | 1.96 (0.95, 2.77) | 2.01(0.38, 4.42) | 2.62** (1.76, 7.68) | 0.043 |
| L cingulum anterior (V) | 5.65** (1.61, 7.07) | 3.34 (1.76, 4.36) | 2.06 (0.74, 4.25) | 3.45 (2.06, 5.44) | 4.50 (2.66, 8.12) | 2.00* (1.35, 3.86) | 0.035 |
| Total cortical structures thickness | 2.08 (0.92, 3.83) | 1.73 (0.82, 3.33) | 1.83 (0.84, 3.40) | 1.65* (0.73, 3.02) | 2.30** (1.02, 4.28) | 2.03 (0.93, 3.84) | <0.001 |
| L front inferior triangular (T) | 2.07 (1.32, 3.67) | 0.87* (0.33, 1.53) | 2.12 (0.74, 3.29) | 1.35 (0.55, 3.39) | 2.31** (1.06, 3.47) | 2.31** (0.89, 3.99) | 0.011 |
| R front middle (T) | 1.55 (0.64, 3.19) | 1.38 (0.66, 2.26) | 0.98 (0.41, 2.01) | 0.93* (0.31, 2.09) | 1.75** (0.98, 3.10) | 1.33 (0.41, 2.32) | 0.040 |
| L temporal middle (T) | 1.57 (0.99, 2.09) | 0.98* (0.16, 1.76) | 1.42 (0.62, 2.35) | 1.36* (0.49, 2.12) | 1.56 (0.77, 3.45) | 3.01** (1.35, 5.83) | 0.010 |
| L temporal inferior (T) | 1.87 (0.90, 2.71) | 1.59 (0.51, 2.40) | 1.17 (0.62, 2.07) | 0.87* (0.33, 1.48) | 1.93** (1.31, 4.13) | 1.86 (0.53, 3.44) | 0.026 |
| L parietal inferior supramarginal (T) | 1.49 (0.83, 2.46) | 1.38 (0.64, 2.58) | 1.26 (0.35, 2.22) | 0.71* (0.17, 2.36) | 2.43** (1.45, 3.87) | 1.34 (0.89, 2.30) | 0.024 |
| L parietal inferior angular (T) | 1.77 (0.84, 3.86) | 1.05* (0.49, 1.87) | 1.28 (0.58, 2.78) | 1.53 (0.57, 3.04) | 2.50** (1.47, 4.79) | 1.65 (0.83, 3.42) | 0.044 |
| R parietal inferior angular (T) | 1.80 (0.86, 3.80) | 1.43 (0.30, 2.98) | 1.26* (0.48, 2.59) | 1.11* (0.41, 2.28) | 3.14** (1.43, 4.74) | 1.99 (0.59, 3.51) | 0.005 |
| R occipital middle (T) | 2.31 (0.39, 3.51) | 1.09* (0.90, 1.91) | 1.19 (0.60, 2.63) | 1.15* (0.32, 1.92) | 2.85** (1.71, 4.58) | 1.77 (0.58, 3.32) | 0.018 |
*, means the TRV values of this combination were significantly lower than those of other combinations; **, means the TRV values of this combination were significantly higher than those of other combinations. TRV, test-retest variability; MPRAGE, magnetization-prepared rapid gradient echo; MEMPRAGE, multi-echo MPRAGE; MP2RAGE, magnetization-prepared 2 rapid acquisition gradient echo; CH, channel; Q1, first quartile; Q3, third quartile; R, right; L, left; V, volume; T, thickness.