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Table 2 Accuracy and reliability of the semiautomatic segmentation

From: Semiautomatic segmentation of the kidney in magnetic resonance images using unimodal thresholding

   N Min 5th percentile Mean 95th percentile t Max SD p (2-tailed) MAD
Accuracy (difference to the reference volume) Observer 1 (1) 48 −11.4 2.4 4.5 6.7 4.3 30.4 7.4 <0.01 6.6
Observer 1 (2) 48 −7.7 0.1 1.7 3.2 2.2 15.3 5.4 <0.05 5.4
Observer 2 48 −15.5 −3.6 −1.6 0.3 −1.7 11.2 6.7 0.095 4.4
Total 144 −15.5 0.4 1.5 2.7 2.6 30.4 7.0 <0.01 5.5
Inter-observer reliability Observer 1 (1)/observer 2 48 −13.9 4.3 6.2 8.1 6.5 24.8 6.5 <0.01 7.3
Observer 1 (2)/observer 2 48 −7.6 1.9 3.3 4.7 4.9 13.9 4.7 <0.01 4.4
Total 96 −13.9 3.6 4.8 5.9 7.9 24.8 5.9 <0.01 6.0
Intra-observer reliability Observer 1 (1)/observer 1 (2) 48 −6.3 1.5 2.9 4.2 4.4 15.1 4.5 <0.01 4.3