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. Author manuscript; available in PMC: 2019 Oct 1.
Published in final edited form as: J Cardiothorac Vasc Anesth. 2018 Apr 4;32(5):2203–2209. doi: 10.1053/j.jvca.2018.04.014

Figure 3.

Figure 3

Results from the algorithm parameter tuning process on the development cohort. (A) Step 1: bootstrapped mean difference and empirical 95% confidence intervals (CI) for all tested image tuning parameter sets (n = 45 parameter sets). Parameter sets with a 95% CI containing 0 (blue solid lines) were considered eligible for further testing while those with 95% CI excluding 0 (orange dashed lines) were eliminated from consideration. (B) Step 2: bootstrapped intraclass correlation coefficient (ICC) and empirical 95% confidence intervals for image tuning parameter sets eligible after step 1 (n = 38 parameter sets). The parameter set with the highest ICC (green line; indicated with arrow) was selected for testing on the validation cohort.