I have currently got a table summarizing some gates and its operations but it looks out of place and the format isn't correct. 
Does anyone know how to align the images with the text? 
Also in the 'effect' column, I would like the text one underneath the other. 
Please see Latex code below and the image attached. 

```
\begin{figure}
  \centering 
  \begin{threeparttable}
    \begin{tabular}{cccc}
    %{m{15mm} m{70mm} m{18mm}}
    Gates  & Circuit Symbol & Matrix Representation & Effect\\
     \midrule\midrule

Pauli-X  & 

\includegraphics[scale = 1 , trim= {50 50 32 25}, clip
]{Chapter2/Figs/Raster/x.png} &

$U(\pi, 0 , \pi) = 
\begin{pmatrix}
0 & 1 \\
1& 0 
\end{pmatrix}$ &

\begin{itemize}
\item $\emph{X}\ket{0}\longrightarrow\ket{1}$ 
\item $\emph{X}\ket{1}\longrightarrow\ket{0}$
\end{itemize}

\\%new row

Pauli-Y  & 

\includegraphics[scale = 1 , trim= {50 50 32 25}, clip
]{Chapter2/Figs/Raster/y.png} &    

$U(\pi , \frac{\pi}{2},\frac{\pi}{2}) = 
\begin{pmatrix}
0 & -i \\
i & 0 
\end{pmatrix}$ & 

\begin{itemize}
\item $\emph{Y}\ket{0}\longrightarrow i\ket{1}$ 
\item $\emph{Y}\ket{1}\longrightarrow-i\ket{0}$,
\end{itemize}

\\%new row

Pauli-Z  & 

\includegraphics[scale = 1 , trim= {50 50 32 25}, clip
]{Chapter2/Figs/Raster/z.png} &

$U(0 , 0 , \pi) = 
\begin{pmatrix}
1 & 0 \\
0 & -1 
\end{pmatrix}$ & 

\begin{itemize}
\item $\emph{Z}\ket{0}\longrightarrow\ket{0}$  
\item $\emph{Z}\ket{1}\longrightarrow-\ket{1}$
\end{itemize}

\\%new row

Hadamard  &
\includegraphics[scale = 1 , trim= {50 50 32 25}, clip
]{Chapter2/Figs/Raster/h.png} & 

$U(\frac{\pi}{2},0 , \pi) = \frac{1}{\sqrt{2}}
\begin{pmatrix}
1 & 1 \\
1 & -1 
\end{pmatrix}$ &

\begin{itemize}
\item $\emph{H}\ket{0}\longrightarrow \frac{1}{\sqrt{2}}(\ket{0}+\ket{1})$  
\item $\emph{H}\ket{1}\longrightarrow \frac{1}{\sqrt{2}}(\ket{0}-\ket{1})$  \end{itemize}

\\% end of rows
    \midrule\midrule
    \end{tabular}
    \begin{tablenotes}
  \caption{Names, circuit symbols and unitary matrix representation for common single qubit gates.}

\end{tablenotes}
\end{threeparttable}
  \end{figure}

```

[![- Latex](https://i.stack.imgur.com/K0SYZ.png)](https://i.stack.imgur.com/K0SYZ.png)