+\subsection{Properties}
+Displays the properties of a phantom which includes:
+
+\begin{itemize}\itemsep=0pt
+\item Overall dimensions of a phantom
+\item A list of all component phantom elements
+\end{itemize}
+
+\subsection{Rasterize Dialog}
+This creates an image file from a phantom. Technically, it
+converts the phantom from a vector (infinite resolution) object
+into a 2-dimension array of floating-point pixels. The parameters
+to set are:
+
+\begin{twocollist}
+\twocolitemruled{\textbf{Parameter}}{\textbf{Options}}
+\twocolitem{\texttt{X size}}{Number of columns in image file}
+\twocolitem{\texttt{Y size}}{Number of rows in image file}
+\twocolitem{\texttt{Samples per pixel}}{Numbers of samples taken
+per pixel in both the x and y directions. For example, if the
+\texttt{Samples per pixel} is set to \texttt{3}, then for every
+pixel in the image file 9 samples (3 x 3) are averaged.}
+\end{twocollist}
+
+\subsection{Projection Dialog}
+This creates a projection file from a phantom. The options
+available when collecting projections are:
+
+\begin{twocollist}
+\twocolitem{\textbf{Geometry}}{
+ \begin{itemize}\itemsep=0pt
+ \item Parallel
+ \item Equiangular
+ \item Equilinear
+ \end{itemize}}
+\twocolitem{\textbf{Number of detectors}}{Sets the number of
+detectors in the detector array.}
+
+\twocolitem{\textbf{Number of views}}{Sets the number of views
+collected}
+
+\twocolitem{\textbf{Samples per detector}}{Sets the number of
+samples collected for each detector}
+
+\twocolitem{\textbf{View Ratio}}{Sets the field of view as a ratio
+of the diameter of the phantom. For normal scanning, a value of
+1.0 is fine.}
+
+\twocolitem{\textbf{Scan Ratio}}{Sets the length of scanning as a
+ratio of the view diameter. For normal scanning, a value of 1.0 is
+fine.}
+
+\twocolitem{\textbf{Focal length ratio}}{Sets the distance of the
+radiation source and detectors from the center of the object as a
+ratio of the radius of the object.
+
+For parallel geometries, a value of 1.0 is fine. For other
+geometries, this should be at least 2.0 to avoid artifacts.}
+\end{twocollist}
+
+\subsection{Advanced Options}
+\begin{twocollist}
+\twocolitem{\textbf{Rotation Angle}}{Sets the rotation amount as a
+multiple of pi. For parallel geometries use a rotation angle of 1
+and for equilinear and equiangular geometries use a rotation angle
+of 2. Using any other rotation angle will lead to artifacts.}
+\end{twocollist}
+
+
+