-\chapter{The Web Browser CGI Interface}\label{webinterface}\index{Web Interface}%
+\chapter{The Web Interface}\label{webinterface}\index{Web Interface}%
\setheader{{\it CHAPTER \thechapter}}{}{}{}{}{{\it CHAPTER \thechapter}}%
\setfooter{\thepage}{}{}{}{}{\thepage}%
\section{Overview}\index{Web Interface,Overview}%
-The CGI program {\tt ctsim.cgi} takes projections of a standard
-phantom object, performs reconstruction, and then compares the
-rasterized phantom object with the reconstruction. The comparison is
-performed both visually by an image subtraction as well as by standard
-statistics as described by Herman\cite{HERMAN80}.
+\ctsim\ can also be executed via a web browser. The CGI program
+\texttt{ctsim.cgi} takes projections of a standard phantom object,
+performs reconstruction, and then compares the rasterized phantom
+object with the reconstruction. The comparison is performed both
+visually by an image subtraction as well as by standard statistics
+as described by Herman\cite{HERMAN80}.
\section{Requirements}\index{Web Interface,Requirements}%
\begin{itemize}\itemsep=0pt
\item A client web browser than can display PNG files. Most
current web browsers support PNG.
+
+ \item A knowledgable system administrator. It is beyond the
+ scope of this manual to explain the installation of the CGI
+ interfact.
\end{itemize}