1 \chapter{The Web Browser CGI Interface}\label{webinterface}\index{Web Interface}%
2 \setheader{{\it CHAPTER \thechapter}}{}{}{}{}{{\it CHAPTER \thechapter}}%
3 \setfooter{\thepage}{}{}{}{}{\thepage}%
5 \section{Overview}\index{Web Interface,Overview}%
6 The CGI program {\tt ctsim.cgi} takes projections of a standard
7 phantom object, performs reconstruction, and then compares the
8 rasterized phantom object with the reconstruction. The comparison is
9 performed both visually by an image subtraction as well as by standard
10 statistics as described by Herman\cite{HERMAN80}.
12 \section{Requirements}\index{Web Interface,Requirements}%
13 \begin{itemize}\itemsep=0pt
14 \item Apache or other CGI compatible web server
16 \item Perl (version 4.0 or higher)
18 \item A client web browser than can display PNG files. Most
19 current web browsers support PNG.