\begin{tabular}{c|c|c|c} & $a$ [s] & $b$ [s] & $k'$ [s] \\\hline
 \textbf{ROI 1} & 0.931$\pm$0.006&0.51$\pm$0.003&0.723$\pm$0.023\\
 \textbf{ROI 2} & 0.923$\pm$0.013&0.498$\pm$0.005&0.62$\pm$0.041\\
 \textbf{ROI 3} & 0.834$\pm$0.01&0.498$\pm$0.006&0.786$\pm$0.059\\
 \textbf{ROI 4} & 0.519$\pm$0.007&0.382$\pm$0.008&0.992$\pm$0.158\\
\end{tabular}