
\begin{figure*}[t]
\centering
\setlength{\tabcolsep}{2pt} % small horizontal spacing
\renewcommand{\arraystretch}{0.7} % small vertical spacing

\begin{tabular}{ccccc}
% Column titles


{\small (a) Regular Border } & {\small (b)Irregular Border} & {\small (c) Homogeneous} & {\small (d) Inhomogeneous} & {\small (e) Calcification} \\[1pt]
% ===== Input row =====
\includegraphics[width=0.18\textwidth]{char_wise_nod/reg/image.png} &
\includegraphics[width=0.18\textwidth]{char_wise_nod/irr/image.png} &
\includegraphics[width=0.18\textwidth]{char_wise_nod/homo/image.png} &
\includegraphics[width=0.18\textwidth]{char_wise_nod/inhomo/image.png} &
\includegraphics[width=0.18\textwidth]{char_wise_nod/cal/f5f162c3-f53b-4342-bba8-c19ce1afd70d.png} \\[2pt]

% ===== Generated / Method 1 row =====
\includegraphics[width=0.18\textwidth]{char_wise_nod/reg/image_3.png} &
\includegraphics[width=0.18\textwidth]{char_wise_nod/irr/image_1.png} &
\includegraphics[width=0.18\textwidth]{char_wise_nod/homo/image_2.png} &
\includegraphics[width=0.18\textwidth]{char_wise_nod/inhomo/image_1.png} &
\includegraphics[width=0.18\textwidth]{char_wise_nod/cal/a3995c8a-6eb8-489a-9f87-e9579aedd8d9.png} \\

\end{tabular}



\caption{
\small
Results of characteristic-specific LoRA training: (a) nodule with a regular border, (b) nodule with an irregular border, (c) nodule with homogeneous texture, (d) nodule with inhomogeneous texture, and (e) nodule with calcification.
}
\label{fig:nodulecharwiselora}
\end{figure*}
% 