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Table 2: 
Mean values of computed tomographic (CT) attenuation, apparent diffusion coefficient (ADC), diffusion-weighted MR imaging (DWI)*
Initial CT and MRIFollow-up MRI at day 1
RD Lesion (ROIRD)DWI Lesion 1 (ROIDWII)DWI Lesion 2 (ROIDW12)RD Lesion (ROIRD)Whole DWI Lesion (ROIDW)
ΔHU2.33 ± 0.742.90 ± 1.340.18 ± 0.28——
ADC (10−6 mm2/s)830 ± 91658 ± 108665 ± 112677 ± 163614 ± 184
ADC ratio0.97 ± 0.070.74 ± 0.090.76 ± 0.100.76 ± 0.140.68 ± 0.15
DWSI ratio1.08 ± 0.111.41 ± 0.171.40 ± 0.171.39 ± 0.321.97 ± 0.41
T2SI ratio1.10 ± 0.081.11 ± 0.111.10 ± 0.111.19 ± 0.181.45 ± 0.20
TTP delay (second)2.56 ± 1.669.09 ± 5.379.01 ± 5.390.06 ± 1.815.63 ± 5.02
Relative CBV1.05 ± 0.240.98 ± 0.350.09 ± 0.351.16 ± 0.370.79 ± 0.31
Relative CBF0.87 ± 0.200.59 ± 0.310.59 ± 0.311.31 ± 0.410.75 ± 0.37
  • Note:—Values are expressed as mean ± SD. ROI indicates region of interest; ΔHU indicates the difference between the Hounsfield unit of the lesion and the control; relative cerebral blood volume (CBV) or cerebral blood flow (CBF) indicates the ratio of lesion value to that of contralateral hemisphere; DWSI, signal intensity on diffusion-weighted MR image; T2SI, signal intensity on T2-weighted image.
  • * Perfusion weighted MR imaging (PWI) data of 1 patient was not included for the quantitative analysis of PWI values due to poor enhancement of the initial PWI.