automatically open. \ctsim\ can open projection files, image
files, phantom files, and plot files.
+On Microsoft Windows platforms, the simplest way to invoke \ctsim\ is
+via the \emph{Start} menu under the \emph{Programs} sub-menu.
+
+\section{Quick Start}\label{quickstart}\index{Quick Start}
\section{File Types}\index{File types}
create and edit these files.
\subsection{Image}
-Image files are 2-dimensional files that store 4-byte floating
+Image files contain 2-dimensional arrays that store 4-byte floating
point values. Images files can be either real or complex-valued.
Typically, all images are real-valued except for images that have been
processed by Fourier transforms. As you might expect,