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Table 5 Comparison between benign and malignant tumors regarding signal homogeneity or heterogeneity, DWI, ADC map, and ADC value

From: Role of diffusion-weighted MRI in characterization of mediastinal masses

  Benign Malignant Test valuea P value Sig.
No. % No. %
Lesion Heterogeneous 8 80 33 97.1 3.539 0.060 NS
Homogeneous 2 20 1 2.9
DWI Facilitated 10 100 2 5.9 34.510 0.000 HS
Restricted 0 0 32 94.1
ADC map Low signal 2 20 33 97.1 33.263 0.000 HS
High signal 0 0 1 2.9
Mixed signal 8 80 0 0.0
ADC value × (10−3 mm2/s) Mean ± SD 1.39 ± 0.26 0.86 ± 0.35 −4.360b 0.000 HS
  1. NS non-significant, HS highly significant
  2. aChi-square test
  3. bIndependent t test