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Table 2 Intra 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)

0.5 ± 16.3

0.2 ± 4.1

0.995

 ESV (μL)

−2.4 ± 17.2

−2.7 ± 14.5

0.939

 EF (%)

0.7 ± 3.2

0.8 ± 4.6

0.725

 LVM (mg)

13.2 ± 28.7

1.5 ± 4.0

0.994

Anisotropic filter

 EDV (μL)

7.6 ± 22.0

2.2 ± 4.3

0.995

 ESV (μL)

8.4 ± 13.2

6.6 ± 7.5

0.977

 EF (%)

−1.3 ± 1.6

−1.4 ± 2.8

0.950

 LVM (mg)

−35.1 ± 49.9

−5.6 ± 7.9

0.972

Total variation filter

 EDV (μL)

0.8 ± 22.2

0.1 ± 3.7

0.991

 ESV (μL)

−4.7 ± 16.3

−3.0 ± 12.5

0.955

 EF (%)

1.0 ± 3.1

1.6 ± 4.4

0.870

 LVM (mg)

−0.4 ± 31.2

−0.6 ± 4.1

0.986

Optimized Rician non-Local Means filter

 EDV (μL)

−0.3 ± 7.7

−0.5 ± 1.9

0.999

 ESV (μL)

−4.8 ± 6.9*

−4.8 ± 5.9*

0.989

 EF (%)

1.1 ± 1.5*

1.6 ± 2.0*

0.934

 LVM (mg)

12.6 ± 30.5

3.3 ± 6.0

0.983

  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