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Table 1 Mean bias and standard deviation of the difference between the manually and automatically derived contours

From: Ultrafast computation of left ventricular ejection fraction using temporal intensity variation in cine steady-state free precession cardiac MR images with or without contrast

 

Apical EDV (mL, %)

Mid EDV (mL, %)

Basal EDV (mL, %)

Total EDV (mL, %)

Apical SV (mL, %)

Mid ESV (mL, %)

Basal ESV (mL, %)

Total ESV (mL, %)

EF (%)

EF# (%)

Bias

0.2, 0.0

-0.3, 0.0

-1.5, -0.4

-0.8, -0.4

1.5, 1.3

4.5, 6.0

-0.3, -0.2

5.6, 7.0

-3.6

-5.4

SDD

3.9, 1.6

8.0, 4.0

5.1, 2.8

14.2, 7.1

3.9, 3.8

7.8, 8.3

3.6, 4.1

11, 11.8

3.9

5.6

  1. Bias = mean difference; EDV = end-diastolic volume; EF = ejection fraction; ESV = end-systolic volume; Mid = mid-cavity; SDD = standard deviation of the difference. Values computed by performing a Bland-Altman analysis. Results presented in mL and % error (ie, percentage of the total left ventricular volume calculated by manual delineation).
  2. # EF computed by rejecting the clinically unacceptable contours (ie, the area was set to zero for these contours).