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Figure 5 | Journal of Cardiovascular Magnetic Resonance

Figure 5

From: Semi-automatic segmentation of myocardium at risk in T2-weighted cardiovascular magnetic resonance

Figure 5

Bias analysis of steps in Segment MaR. Bias as mean ± standard deviation to manual delineation for EM-algorithm without a priori information, indicated in blue, and for steps 3, 4, 5 and 6 of Segment MaR, indicated in black. Mean is indicated with a horizontal line on the middle of the vertical line which indicates mean ± standard deviation. The red dashed line shows zero bias to manual delineation by reference observer. EM-algorithm without a priori information is the baseline. Step 3 is EM algorithm with a priori information, step 4 introduces transmural sectors, step 5 uses a priori regional criteria and step 6 uses interpolation to get physiological and smooth appearance. Note how the bias and standard deviation is decreased by utilizing a priori information in step 3 and 5.

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