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Table 2 Estimation of time saving derived from the time-saving proportions, minus the average time required for reading Atri-U outputs

From: Atri-U: assisted image analysis in routine cardiovascular magnetic resonance volumetry of the left atrium

  Time required per case (in seconds) Time saved = manual time \(*\) (proportion of data scored as “no need for correction” + 50% \(*\) proportion of data scored as “minor corrections needed”) Proportion of datasets from sample D2 for each possible score
Score    0 1 2a
ES frame detection 5  = 5 \(*\) 91.3% + 50% \(*\) 5 \(*\) 4.7% = 4.7 s 91.3% 4.7% 4.0%
Segmentation 80  = 80 \(*\) 82.7% + 50% \(*\) 80 \(*\) 11.3% = 70.7 s 82.7% 11.3% 6.0%
Landmark detection 20  = 20 \(*\) 90.7% + 50% \(*\) 20 \(*\) 5.3% = 18.7 s 90.7% 4.0% 5.3%
Subtotal 105  = 94.1    
Minus reading 23  = 94.1–23.0    
Total time saving   71.1    
  1. aScore 2 meant “no time saving/correction from scratch”, and therefore is not included in the above calculations; ES, End-systolic