\item linear
\end{itemize}
}
- \twocolitem{{\bf -backprojection}}{Selects the backprojection technique. A setting of {\tt idiff3} is optimal.
+\twocolitem{{\bf -backprojection}}{Selects the backprojection technique. A setting of {\tt idiff3} is optimal.
\begin{itemize}\itemsep=0pt
\item trig
\item table