Table 4. Unadjusted means and mean differences (95% confidence interval) of regional cortical thickness by field strength (1.5 T vs. 3 T) for right and left hemispheres in 295 controls using multivariate regression model.
| Region | Left Hemisphere | Right Hemisphere | ||||
| 1.5 T | 3 T | Mean differences | 1.5 T | 3 T | Mean differences | |
| Banks of the STS+ | 2.50* | 2.56* | 0.06 (0.01, 0.10) | 2.50* | 2.61* | 0.11 (0.07, 0.15) |
| Caudal anterior cingulate | 2.56* | 2.64* | 0.08 (0.02, 0.14) | 2.60 | 2.62 | 0.01 (−0.05, 0.07) |
| Caudal middle frontal | 2.54 | 2.53 | −0.01 (−0.05, 0.03) | 2.52 | 2.54 | 0.02 (−0.02, 0.06) |
| Cuneus | 1.91* | 1.80* | −0.12 (−0.15, −0.08) | 1.92* | 1.78* | −0.14 (−0.18, −0.10) |
| Entorhinal | 3.23* | 3.32* | 0.09 (0.01, 0.18) | 3.19* | 3.39* | 0.20 (0.12, 0.29) |
| Fusiform | 2.54* | 2.68* | 0.14 (0.10, 0.18) | 2.52* | 2.66* | 0.14 (0.10, 0.18) |
| Inferior parietal | 2.48 | 2.49 | 0.02 (−0.02, 0.05) | 2.50 | 2.51 | 0.00 (−0.03, 0.04) |
| Inferior temporal | 2.73 | 2.76 | 0.03 (−0.01, 0.07) | 2.72* | 2.80* | 0.09 (0.05, 0.13) |
| Isthmus cingulate | 2.42* | 2.53* | 0.11 (0.06, 0.15) | 2.39* | 2.45* | 0.06 (0.01, 0.11) |
| Lateral occipital | 2.18* | 2.11* | −0.08 (−0.11, −0.04) | 2.22* | 2.15* | −0.07 (−0.10, −0.03) |
| Lateral oribitofrontal | 2.57* | 2.70* | 0.12 (0.08, 0.17) | 2.64* | 2.69* | 0.05 (0.01, 0.09) |
| Lingual | 2.03* | 1.94* | −0.09 (−0.13, −0.05) | 2.04* | 1.92* | −0.11 (−0.15, −0.08) |
| Medial orbitofrontal | 2.49 | 2.46 | −0.04 (−0.08, 0.01) | 2.45 | 2.49 | 0.04 (0.00, 0.09) |
| Middle temporal | 2.83* | 2.92* | 0.09 (0.05, 0.13) | 2.83* | 2.92* | 0.09 (0.05, 0.13) |
| parahippocampal | 2.53* | 2.81* | 0.28 (0.20, 0.36) | 2.47* | 2.75* | 0.28 (0.21, 0.35) |
| paracentral | 2.31 | 2.31 | 0.00 (−0.04, 0.05) | 2.27 | 2.28 | 0.01 (−0.03, 0.06) |
| Pars opercularis | 2.59 | 2.62 | 0.03 (−0.01, 0.07) | 2.59 | 2.62 | 0.03 (−0.01, 0.07) |
| Pars orbitalis | 2.69* | 2.76* | 0.07 (0.02, 0.12) | 2.68 | 2.72 | 0.04 (−0.02, 0.10) |
| Pars triangularis | 2.49* | 2.53* | 0.04 (0.00, 0.09) | 2.51* | 2.56* | 0.05 (0.00, 0.09) |
| Pericalcarine | 1.72* | 1.55* | −0.17 (−0.21, −0.13) | 1.68* | 1.51* | −0.17 (−0.21, −0.13) |
| Postcentral | 2.06* | 2.02* | −0.04 (−0.07, −0.01) | 2.07* | 2.02* | −0.04 (−0.08, −0.01) |
| Posterior cingulate | 2.46* | 2.55* | 0.09 (0.05, 0.13) | 2.46* | 2.54* | 0.08 (0.04, 0.12) |
| Precentral | 2.44* | 2.50* | 0.06 (0.01, 0.10) | 2.42* | 2.48* | 0.06 (0.02, 0.11) |
| Precuneus | 2.36 | 2.35 | −0.01 (−0.05, 0.02) | 2.35 | 2.35 | 0.01 (−0.03, 0.04) |
| Rostral anterior cingulate | 2.79* | 2.93* | 0.14 (0.08, 0.20) | 2.83* | 2.91* | 0.08 (0.02, 0.15) |
| Rostral middle frontal | 2.40* | 2.36* | −0.04 (−0.08, −0.01) | 2.42* | 2.37* | −0.04 (−0.08, −0.01) |
| Superior frontal | 2.72 | 2.75 | 0.02 (−0.02, 0.06) | 2.71 | 2.75 | 0.04 (0.00, 0.07) |
| Superior parietal | 2.21* | 2.15* | −0.05 (−0.09, −0.02) | 2.23* | 2.18* | −0.05 (−0.09, −0.02) |
| Superior temporal | 2.75* | 2.81* | 0.06 (0.02, 0.11) | 2.73* | 2.83* | 0.10 (0.06, 0.14) |
| Supramarginal | 2.53* | 2.57* | 0.04 (0.00, 0.07) | 2.58 | 2.58 | 0.01 (−0.03, 0.04) |
| Frontal pole | 2.76 | 2.70 | −0.06 (−0.13, 0.01) | 2.76* | 2.67* | −0.09 (−0.16, −0.02) |
| Temporal pole | 3.47* | 3.69* | 0.21 (0.12, 0.31) | 3.56* | 3.75* | 0.19 (0.09, 0.28) |
| Transverse temporal | 2.37 | 2.32 | −0.05 (−0.11, 0.01) | 2.32 | 2.37 | 0.04 (−0.02, 0.11) |
| Insula | 2.97 | 2.99 | 0.02 (−0.02, 0.06) | 3.00 | 2.97 | −0.02 (−0.06, 0.02) |
The regions with the significant field strength effect (p<0.05) on cortical thickness are denoted with “*”.
Note: overall field strength effect on regional cortical thickness is significant with p-value <0.0001 using Pillai's Trace test. +STS = superior temporal sulcus.