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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