-was first written in 1983 using MS-DOS and an EGA display adapter. In 1999 it was ported to GNU/Linux and later ported to Microsoft Windows.
-
-.SH SEE ALSO
-.BR ifinfo (1), if1 (1), if2 (1), ifexport (1), phm2pj (1), phm2if (1), pj2if (1), pjinfo (1), pjrec (1)
+.Nd A Graphical Computed Tomography Simulator
+.Sh SYNOPSIS
+.Nm ctsim files-to-open... [OPTIONS]
+.Sh DESCRIPTION
+.Pp
+.Nm
+is a graphical user interface to the various components of the CTSim package. The home for CTSim is http://www.ctsim.org.
+.Sh OPTIONS
+.Bl -tag -width Ds
+.It Fl Fl version
+Display version
+.It Fl Fl help
+Print a terse help message
+.El
+.Sh AUTHORS
+Kevin Rosenberg, M.D. <kevin@ctsim.org>
+.Sh HISTORY
+CTSim was begun in 1983 using MS-DOS and an EGA display adapter. In
+1999 it was ported to GNU/Linux and later ported to Microsoft Windows.
+.Sh SEE ALSO
+ifinfo (1), if1 (1), if2 (1), ifexport (1), phm2pj (1), phm2if (1), pj2if (1), pjinfo (1), pjrec (1)