Parbox 图形和行距调整

Question

我需要一个 5 列的表格，其中最后一列包含数字。当我使用 \parbox 时，行间距会增加，并且数字不会在 lat 列下对齐。请问我该如何修复它。以下是代码

\begin{table}[h]
\caption{ Simulation parameters.}
\begin{tabularx}{\textwidth}{@{}l*{5}{d{1}}@{}}
\toprule[\heavyrulewidth]
 Case & \mC{$D_{1}$} &  \mC{$D_{2}$}  &  \mC{$D_{3}$}  & \mC{shape}  \\
%\cmidrule(l){2-7}
%& \mC{OLS} & \mC{OLS} & \mC{OLS} & \mC{OLS} & \mC{2SLS} & \mC{2SLS}  \\
\midrule
$\mathcal{S}_{D1}$ & 0.077 & 0.065 & 0.061 & \parbox[t]{2em}{\linespread{0.2}\selectfont
      \includegraphics[scale=0.1]{Small_Def1_Sep2021_2.jpeg}} \\
      $\mathcal{S}_{D2}$ & 0.121 & 0.109 & 0.101 & \parbox[t]{2em}{\linespread{0.2}\selectfont
       \includegraphics[scale=0.1]{Small_Def2_Sep2021_2.jpeg}} \\
      $\mathcal{S}_{D3}$ & 0.157 & 0.143 & 0.119 & \parbox[t]{2em}{\linespread{0.2}\selectfont
   \includegraphics[scale=0.1]{Small_Def3_Sep2021_2.jpeg}} \\
    $\mathcal{S}_{D4}$ & -0.040 & -0.045 & -0.063 & \parbox[t]{2em}{\linespread{0.2}\selectfont
   \includegraphics[scale=0.1]{Small_Def4_Sep2021_4.jpeg}} \\
      $\mathcal{S}_{D5}$ & -0.097 & -0.139 & -0.196 & \parbox[t]{2em}{\linespread{0.2}\selectfont
   \includegraphics[scale=0.1]{Small_Def5_Sep2021_2.jpeg}} \\
\bottomrule[\heavyrulewidth]
\end{tabularx}\label{table:Parameters}
\end{table}