X-Git-Url: http://git.kpe.io/?a=blobdiff_plain;f=doc%2Fctsim-concepts.tex;h=21f94ddec9e999d3d39ea3f09613f51bbf824f0d;hb=464c5028a9dd12b75fc05ea80fdf124af2bcbb01;hp=ddf6bed819ad82cc4516a7f67239494adfef9976;hpb=d3fa225aa232e132cc198672c4fc148f96a1ab8c;p=ctsim.git

diff --git a/doc/ctsim-concepts.tex b/doc/ctsim-concepts.tex
index ddf6bed..21f94dd 100644
--- a/doc/ctsim-concepts.tex
+++ b/doc/ctsim-concepts.tex
@@ -1,6 +1,6 @@
 \chapter{Concepts}\index{Concepts}%
 \setheader{{\it CHAPTER \thechapter}}{}{}{}{}{{\it CHAPTER \thechapter}}%
-\setfooter{\thepage}{}{}{}{\small Version 0.2}{\thepage}%
+\ctsimfooter%
 
 \section{Overview}\label{conceptoverview}\index{Concepts,Overview}%
 The operation of \ctsim\ begins with the phantom object.  A
@@ -39,7 +39,7 @@ phantom.  Each line contains seven entries, in the following form:
 element-type cx cy dx dy r a
 \end{verbatim}
 The first entry defines the type of the element, either
-\rtfsp\texttt{rectangle}, \texttt{}, \texttt{triangle},
+\rtfsp\texttt{rectangle}, \texttt{ellipse}, \texttt{triangle},
 \rtfsp\texttt{sector}, or \texttt{segment}. \texttt{cx},
 \rtfsp\texttt{cy}, \texttt{dx} and \texttt{dy} have different
 meanings depending on the element type.
@@ -114,10 +114,10 @@ variable is the diameter of the circle surround the phantom, or the
 \emph{phantom diameter}. Remember, as mentioned above, the
 phantom dimensions are also padded by 1\%.
 
-The other important geometry variables for scanning objects are the
-\emph{view ratio}, \emph{scan ratio}, and \emph{focal length ratio}.
-These variables are all input into \ctsim\ in terms of ratios rather
-than absolute values.
+The other important geometry variables for scanning phantoms are
+the \emph{view diameter}, \emph{scan diameter}, and \emph{focal
+length}. These variables are all input into \ctsim\ in terms of
+ratios rather than absolute values.
 
 \subsubsection{Phantom Diameter}
 \begin{figure}
@@ -165,7 +165,7 @@ By default, the entire \emph{view diameter} is scanned. For
 experimental purposes, it may be desirable to scan an area either
 larger or smaller than the \emph{view diameter}. Thus, the concept
 of \emph{scan ratio}, \latexonly{$s_r$,}\latexignore{\emph{SR},}
-is born. The scan diameter
+is arises. The scan diameter
 \latexonly{$s_d$}\latexignore{\emph{Sd}} is the diameter over
 which x-rays are collected and is defined as \latexonly{$$s_d =
 v_d s_r$$}\latexignore{\\$$\emph{Sd = Vd x SR}$$\\} By default and
@@ -186,10 +186,9 @@ calculated as
 For parallel geometry scanning, the focal length doesn't matter.
 However, divergent geometry scanning (equilinear and equiangular),
 the \emph{focal length ratio} should be set at \texttt{2} or more
-to avoid artifacts. Moreover, a value of less than \texttt{1},
-though it can be given to \ctsim, is physically impossible and it
-analagous to have having the x-ray source with the \emph{view
-diameter}.
+to avoid artifacts. Moreover, a value of less than \texttt{1} is
+physically impossible and it analagous to have having the x-ray
+source inside of the \emph{view diameter}.
 
 
 \subsection{Parallel Geometry}\label{geometryparallel}\index{Concepts,Scanner,Geometries,Parallel}
@@ -261,9 +260,9 @@ Since in normal scanning $s_r$ = 1, $\alpha$ depends only upon the
 
 \subsubsection{Detector Array Size}
 In general, you do not need to be concerned with the detector
-array size. It is automatically calculated by \ctsim. For those
-interested, this section explains how the detector array size is
-calculated.
+array size. It is automatically calculated by \ctsim. For the
+particularly interested, this section explains how the detector
+array size is calculated.
 
 For parallel geometry, the detector length is equal to the scan
 diameter.
@@ -277,9 +276,8 @@ For equiangular geometry, the detectors are spaced around a circle
 covering an angular distance of
 \latexonly{$2\,\alpha$.}\latexignore{\emph{2 \alpha}.} The dotted
 circle in
-\begin{figure}
-\image{10cm;0cm}{equiangular.eps}
-\caption{Equiangluar geometry}
+\begin{figure}\label{equiangularfig}
+\image{10cm;0cm}{equiangular.eps} \caption{Equiangular geometry}
 \end{figure}
 figure 2.4 indicates the positions of the detectors in this case.
 
@@ -288,11 +286,11 @@ line. The length of the line depends upon
 \latexonly{$\alpha$}\latexignore{\emph{alpha}} and the \emph{focal
 length}. It is calculated as \latexonly{$4\,f \tan (\alpha / 2)$}
 \latexignore{\emph{4 x F x tan(\alpha/2)}}
-\begin{figure}
+\begin{figure}\label{equilinearfig}
 \image{10cm;0cm}{equilinear.eps}
 \caption{Equilinear geometry}
 \end{figure}
-An example of the this geometry is in figure 2.5.
+This geometry is shown in figure~2.5.
 
 
 \subsubsection{Examples of Geometry Settings}