Insights into Imaging

Table 5 2D versus 3D T2W MRI segmentation variability (n = 12)

From: Challenge of prostate MRI segmentation on T2-weighted images: inter-observer variability and impact of prostate morphology

Structure	DSC			HD (mm)
Structure	2D	3D	p-value	2D	3D	p-value
Zone^a
WG	0.90 ± 0.03	0.91 ± 0.03	0.006	6.97 ± 2.54	6.68 ± 2.06	0.24
TZ	0.86 ± 0.06	0.86 ± 0.06	0.8	7.92 ± 3.07	7.53 ± 2.23	0.44
Region^b
Base	0.70 ± 0.16	0.71 ± 0.15	0.32	6.89 ± 2.79	6.31 ± 2.2	0.03
Mid-gland	0.94 ± 0.02	0.95 ± 0.02	0.01	4.14 ± 1.11	4.31 ± 1.59	0.33
Apex	0.76 ± 0.16	0.79 ± 0.12	0.11	4.54 ± 1.69	4.23 ± 1.56	0.05*

^aComputations with 3D metrics
^bComputations with slicewise metrics
^*Not significant

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