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. Author manuscript; available in PMC: 2015 Apr 1.
Published in final edited form as: Neuroimage. 2013 Dec 15;89:92–109. doi: 10.1016/j.neuroimage.2013.12.007

Table 2.

Mean and standard deviation values for longitudinal T1ρ relaxation, transverse T2ρ relaxation, correlation time constant τc,b, exchange time constant τex, exchange chemical shift δωex, water bound fraction Pb. Values are calculated in eight ROIs segmented by Freesurfer 5.1 on high-resolution 3D anatomical scans and coregistered to the 3D rotating frame relaxation maps acquired in the brains of five human volunteers. Only voxels with a coefficient of determination R2 > 0.95 were used for statistical analysis. Voxels at the boundary of ROIs were also excluded. RH – right hemisphere, LH – left hemisphere, Ventral DC – ventral diencephalon, SN – substancia nigra.

Brain ROI T1ρ (ms) T2ρ (ms) τc,b (ns) τex (ms) δωex (ppm) Pb
White Matter RH 79.5 ± 5.5 73.9 ± 7.5 2.40 ± 0.15 0.21 ± 0.01 0.42 ± 0.02 0.125 ± 0.005

LH 79.0 ± 5.4 73.9 ± 7.4 2.41 ± 0.15 0.21 ± 0.01 0.42 ± 0.02 0.126 ± 0.005

Gray Matter RH 96.1 ± 16.9 90.4 ± 15.8 2.13 ± 0.18 0.18 ± 0.03 0.36 ± 0.04 0.109 ± 0.013

LH 95.3 ± 13.9 90.3 ± 15.1 2.11 ± 0.15 0.18 ± 0.02 0.36 ± 0.03 0.108 ± 0.010

Thalamus RH 80.8 ± 6.2 80.5 ± 8.6 2.29 ± 0.14 0.20 ± 0.01 0.41 ± 0.02 0.122 ± 0.006

LH 80.3 ± 6.0 80.0 ± 8.1 2.29 ± 0.15 0.20 ± 0.01 0.41 ± 0.02 0.122 ± 0.006

Caudate RH 90.7 ± 5.9 84.2 ± 9.5 2.16 ± 0.11 0.19 ± 0.01 0.37 ± 0.02 0.112 ± 0.005

LH 90.9 ± 6.3 82.9 ± 8.9 2.15 ± 0.12 0.19 ± 0.01 0.37 ± 0.02 0.111 ± 0.005

Putamen RH 85.8 ± 6.5 80.4 ± 8.6 2.18 ± 0.11 0.19 ± 0.01 0.39 ± 0.02 0.116 ± 0.006

LH 84.5 ± 6.2 80.0 ± 9.2 2.18 ± 0.11 0.20 ± 0.01 0.39 ± 0.02 0.117 ± 0.005

Pallidum RH 69.8 ± 3.7 64.5 ± 5.8 2.55 ± 0.15 0.22 ± 0.01 0.45 ± 0.01 0.134 ± 0.004

LH 68.7 ± 3.9 64.0 ± 5.3 2.59 ± 0.17 0.23 ± 0.01 0.45 ± 0.02 0.136 ± 0.005

Hippocampus RH 91.8 ± 8.2 86.8 ± 13.7 2.14 ± 0.13 0.19 ± 0.01 0.37 ± 0.02 0.111 ± 0.006

LH 87.2 ± 7.7 72.2 ± 14.1 2.11 ± 0.13 0.19 ± 0.01 0.38 ± 0.02 0.113 ± 0.006

Ventral DC (SN) RH 73.4 ± 7.4 69.9 ± 10.7 2.48 ± 0.21 0.22 ± 0.01 0.43 ± 0.03 0.130 ± 0.008

LH 72.1 ± 7.3 67.2 ± 10.4 2.50 ± 0.21 0.22 ± 0.01 0.44 ± 0.03 0.132 ± 0.008