Table 1.
Estimated water content, susceptibility and electrical conductivity values in normal and pathological brain tissue regions†.
| Brain Regions | Healthy Control | Pathological Brain Tissue | ||||
|---|---|---|---|---|---|---|
| Control 1 | Control 2 | Patient 1 | Patient 2 | Patient 3 | ||
| Water Content (%) | White Matter | 70.56/5.2 | 71.10/2.4 | 69.11/3.5 | 71.58/2.9 | 70.14/3.0 |
| Grey Matter | 79.32/6.7 | 82.30/4.0 | 83.80/5.2 | 85.03/3.8 | 84.46/2.4 | |
| CSF* | 100/2.0 | 100/2.6 | 100/3.6 | 100/3.5 | 100/2.0 | |
| Tumour | N/A | N/A | 86.00/6.5 | 86.20/4.9 | 81.20/5.7 | |
| Oedema | N/A | N/A | N/A | 82.23/7.2 | 81.14/4.3 | |
| Conductivity (S/m) | White Matter | 0.57/0.23 | 0.58/0.22 | 0.44/0.22 | 0.66/0.27 | 0.48/0.23 |
| Grey Matter | 0.93/0.42 | 1.06/0.56 | 1.02/0.69 | 1.07/0.53 | 0.97/0.44 | |
| CSF | 2.30/0.34 | 1.97/0.54 | 2.16/0.42 | 1.905/0.17 | 1.955/0.23 | |
| Tumour | N/A/ | N/A | 0.83/0.49 | 1.15/0.21 | 1.13/0.55 | |
| Oedema | N/A/ | N/A | N/A | 1.15/0.46 | 1.22/0.24 | |
| Susceptibility (ppm)** | White Matter | −0.055/0.007 | −0.053/0.006 | −0.058/0.008 | −0.065/0.013 | −0.050/0.011 |
| Grey Matter | −0.020/0.036 | −0.025/0.025 | −0.024/0.030 | −0.028/0.027 | −0.019/0.023 | |
| CSF *** | 0/0.014 | 0/0.021 | 0/0.008 | 0/0.020 | 0/0.020 | |
| Tumour | N/A | N/A | −0.01/0.007 | −0.052/0.014 | −0.067/0.010 | |
| Oedema | N/A | N/A | N/A | −0.047/0.011 | −0.046/0.010 | |
†Data show mean/standard deviation of the Gaussian distribution fit.
*Normalized value. CSF water content assumed to be 100%.
**Relative value (difference) with respect to CSF.
***Reference value. CSF susceptibility set to 0 ppm.