Table 2.

Results of automatic kidney and liver segmentation for different magnetic resonance imaging sequences

Cohort, Organ, and Magnetic Resonance Imaging Sequence	No. of Scans	Dice	Jaccard	Sensitivity	Precision	Hausdorff	Mean Surface Distance
Dataset A test
Kidneys
T2 SPIR ax	43	0.96 [0.90–0.97]	0.92 [0.82–0.95]	0.95 [0.91–0.97]	0.97 [0.89–0.97]	11.0 [7.0–18.8]	0.51 [0.28–1.33]
T2 ax	43	0.94 [0.89–0.95]	0.88 [0.80–0.91]	0.92 [0.89–0.95]	0.95 [0.89–0.97]	11.5 [8.0–15.9]	0.78 [0.52–1.39]
T2 map ax	38	0.92 [0.89–0.94]	0.85 [0.80–0.89]	0.92 [0.88–0.95]	0.93 [0.87–0.96]	7.2 [5.0–20.0]	0.46 [0.35–1.0]
Dataset B test
Kidneys
HASTE cor	182	0.97 [0.94–0.98]	0.93 [0.88–0.95]	0.97 [0.94–0.98]	0.96 [0.94–0.98]	10.0 [6.2–18.8]	0.36 [0.26–0.56]
TRUFI cor	18	0.96 [0.94–0.98]	0.93 [0.89–0.95]	0.96 [0.94–0.98]	0.97 [0.94–0.98]	10.3 [7.3–15.8]	0.35 [0.28–0.51]
Liver
HASTE cor	165	0.96 [0.94–0.97]	0.93 [0.88–0.94]	0.96 [0.93–0.98]	0.96 [0.93–0.98]	14.0 [8.6–22.6]	0.46 [0.36–0.72]
TRUFI cor	16	0.96 [0.95–0.97]	0.93 [0.90–0.95]	0.96 [0.92–0.97]	0.97 [0.95–0.98]	16.3 [5.9–29.3]	0.48 [0.39–0.68]

Values are reported as median and 10–90 percentile range (in square brackets). Hausdorff distance and mean surface distance are measured in voxels. T2, T2-weighted sequence; SPIR, spectral presaturation with inversion recovery; ax, axial; T2 map, T2 mapping; HASTE, half-Fourier–acquired single-shot turbo spin echo; cor, coronal; TRUFI, coronal T2 true fast imaging with steady-state free precession.