\begin{figure}[b]
% \vspace{-2mm}
\centering
% \includegraphics[trim={0 4cm 12cm 0},clip,width=0.45\linewidth]{imgs/reg_results_wf.pdf}
% \includegraphics[trim={0 0 12cm 4.5cm},clip,width=0.45\linewidth]{imgs/reg_results_wf.pdf}
\includegraphics[width=1\linewidth]{imgs/reg_results_typical2.pdf}
% \vspace{-3mm}
\caption{3DUS registration on typical cases. For each subject, the rows show the axial, sagittal, and coronal planes, respectively.  Greedy and ANTs fail on both cases. LOTUS achieves good performance by mitigating the influence of the FOV shape.
} 
\label{reg_results}
%\vspace{-4mm}
\end{figure}