Table 1.
Relative CBV and CBF parameters in 9L and C6 tumors for dual-echo, correction methods 1-3, and MION. Slope, CCC, R, and p-values are obtained from each method versus MION.
9L | C6 | ||||||||||
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Method | Mean (std) | slopea | CCCa | Ra | P-valuea | Mean (std) | slopea | CCCa | Ra | P-valuea | |
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rCBV | Dual-Echo | 1.81 (0.45) | 1.48 | 0.30 | 0.78 | 0.003 | 1.57 (0.31) | 1.81 | 0.30 | 0.83 | 0.006 |
Method 1 | 1.04 (0.38) | 1.17 | 0.48 | 0.73 | 0.007 | 1.24 (0.32) | 1.90 | 0.65 | 0.86 | 0.003 | |
Method 2 | 1.02 (0.27) | 0.90 | 0.47 | 0.78 | 0.003 | 1.17 (0.25) | 1.66 | 0.79 | 0.96 | <0.001 | |
Method 3 | 1.40 (0.37) | 0.98 | 0.54 | 0.63 | 0.027 | 1.30 (0.34) | 1.48 | 0.43 | 0.63 | 0.07 | |
MION | 1.30 (0.24) | -- | -- | -- | -- | 1.23 (0.14) | -- | -- | -- | -- | |
rCBF | Dual-Echo | 0.88 (0.20) | 0.51 | 0.40 | 0.54 | 0.07 | 1.13 (0.18) | 0.37 | 0.34 | 0.43 | 0.25 |
Method 1 | 0.83 (0.20) | 0.49 | 0.32 | 0.51 | 0.09 | 1.08 (0.19) | 0.44 | 0.33 | 0.47 | 0.20 | |
Method 2 | 0.81 (0.18) | 0.49 | 0.31 | 0.57 | 0.05 | 1.07 (0.17) | 0.36 | 0.27 | 0.44 | 0.24 | |
Method 3 | 0.87 (0.19) | 0.48 | 0.37 | 0.52 | 0.08 | 1.10 (0.20) | 0.31 | 0.23 | 0.32 | 0.40 | |
MION | 1.04 (0.21) | -- | -- | -- | -- | 1.26 (0.20) | -- | -- | -- | -- |
std: standard deviation; CCC: concordance correlation coefficient; R: Pearson's correlation coefficient;
between each method and MION