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Table 3 Comparison of IVIM parameters between different mrCRM and mrEMVI statuses in mesorectum adjacent to and distant from the rectal tumours

From: Quantitative assessment of the microstructure of the mesorectum with different prognostic statuses by intravoxel incoherent motion diffusion-weighed magnetic resonance imaging

 

IVIM parameters

mrCRM ( +) (n = 47)

mrCRM (-) (n = 54)

p

mrEMVI ( +) (n = 25)

mrEMVI (-) (n = 76)

p

MAT

D (10–3·mm2/s)

1.31 (0.64)

0.97 (0.47)

 < 0.001

1.32 (0.50)

1.00 (0.58)

0.001

D* (10–3·mm2/s)

13.43 (6.86)

14.53 (6.08)

0.775

14.35 (7.22)

14.39 (6.27)

0.427

f

0.21 (0.14)

0.29 (0.11)

0.001

0.19 (0.13)

0.29 (0.13)

 < 0.001

MDT

D (10–3·mm2/s)

0.73 (0.75)

0.53 (0.31)

0.013

0.88 (0.64)

0.53 (0.33)

 < 0.001

D* (10–3·mm2/s)

11.98 (5.44)

12.22 (4.95)

0.591

11.36 (7.11)

12.57 (5.06)

0.366

f

0.29 (0.12)

0.31 (0.09)

0.219

0.27 (0.08)

0.32 (0.10)

0.003

  1. IVIM Intravoxel incoherent motion, MAT Mesorectum adjacent to the tumour, MDT Mesorectum distant from the tumour, mrCRM MRI-detected circumferential resection margin, mrEMVI MRI-detected extramural vascular invasion