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Table 3 Inter observer variation study for all parameters on raw and filtered images

From: Improving the evaluation of cardiac function in rats at 7T with denoising filters: a comparison study

 

Difference

Difference (%)

r

No filter

 EDV (μL)

31.7 ± 13.0

6.2 ± 3.5***

0.998

 ESV (μL)

23.5 ± 21.6

14.4 ± 14.0**

0.926

 EF (%)

−2.3 ± 3.9

−3.3 ± 5.6*

0.544

 LVM (mg)

−32.8 ± 23.8

−5.2 ± 3.9**

0.993

Anisotropic filter

 EDV (μL)

21.3 ± 16.1

4.3 ± 3.6**

0.996

 ESV (μL)

13.3 ± 22.1

9.9 ± 14.9

0.909

 EF (%)

−1.7 ± 4.9

−2.4 ± 7.6

0.692

 LVM (mg)

−81.8 ± 48.9

−12.5 ± 8.4***

0.971

Total variation filter

 EDV (μL)

28.7 ± 19.2

5.8 ± 4.3**

0.994

 ESV (μL)

11.4 ± 24.6

8.6 ± 18.1

0.856

 EF (%)

−0.9 ± 4.4

−1.3 ± 6.4

0.706

 LVM (mg)

−63.3 ± 30.1

−10.0 ± 5.5***

0.987

Optimized Rician non-Local Means filter

 EDV (μL)

26.9 ± 19.1

4.7 ± 3.2**

0.997

 ESV (μL)

19.5 ± 20.2

13.5 ± 13.9*

0.904

 EF (%)

−2.4 ± 3.7

−3.2 ± 6.3

0.764

 LVM (mg)

−29.2 ± 27.0

−4.6 ± 3.9**

0.991

  1. Correlation coefficient (r) and evaluation of the absolute and relative mean difference (%). EDV: End diastolic volume; ESV: End systolic volume; EF: Ejection fraction; LVM: Left ventricular mass. *p 0.05, **p 0.01, ***p 0.001