+\parskip=10pt
+\chapter{Introduction}\label{IDH_INTRODUCTION}
+\pagenumbering{arabic}
+\setheader{{\it CHAPTER \thechapter}}{}{}{\ctsimheadtitle}{}{{\it CHAPTER \thechapter}}%
+\ctsimfooter
+
+
+\centerline{\image{3cm;3cm}{logo.eps}}
+Computed tomography is a technique for estimating the interior of an
+object from measurements of radiation collected around the object. This
+radiation can be either projected through or emitted from the
+object. \ctsim\ simulates the process of projecting X-rays
+through a phantom object. \ctsim\ can then reconstruct the
+interior of the object from those projections. \ctsim\ integrates
+numerous visualization and analytic tools.
+
+This manual begins with an introduction into the concepts of
+\ctsim. Next, the graphical, command-line, and web shells are
+presented. Finally, the installation of \ctsim\ is discussed.
+
+I hope that you enjoy \ctsim!