From: Kevin M. Rosenberg <kevin@rosenberg.net>
Date: Thu, 8 Feb 2001 15:52:59 +0000 (+0000)
Subject: r502: no message
X-Git-Tag: debian-4.5.3-3~515
X-Git-Url: http://git.kpe.io/?p=ctsim.git;a=commitdiff_plain;h=512a128ce9bc1d4a4477df791d2a1e63148752af

r502: no message
---

diff --git a/doc/ctsim-concepts.tex b/doc/ctsim-concepts.tex
index f8c0da1..32d60c8 100644
--- a/doc/ctsim-concepts.tex
+++ b/doc/ctsim-concepts.tex
@@ -215,7 +215,7 @@ to be calculated. For real-world CT scanners, this is fixed at the
 time of manufacture. \ctsim, however, calculates the \emph{fan beam angle},
 \latexonly{$\alpha$,}\latexignore{\emph{alpha},} 
 from the diameter of the \emph{scan diameter} and the \emph{focal length}
-\latexignore{\\$$\emph{alpha = 2 x asin ( (Sd / 2) / F)}$$\\}
+\latexignore{\\$$\emph{alpha = 2 x asin ( (Sd / 2) / f)}$$\\}
 \latexonly{$$\alpha = 2 \sin^{-1} ((s_d / 2) / f)$$}
 This is illustrated in figure 2.3.
 \begin{figure}
@@ -231,6 +231,14 @@ there are significant artifacts. The primary way to manage the
 \emph{fan beam angle} is by varying the \emph{focal length} since the
 \emph{scan diameter} by the size of the phantom.
 
+$$s_d = p_d v_R s_R$$
+If $v_r = 1$ and $s_R = 1$, then $s_d = p_d$. Further, $f = f_R v_R (p_d / 2)$
+Plugging these equations into the above equation,
+$$\alpha = 2\,\sin^{-1} \frac{p_d / 2}{f_R (p_d / 2)}$$
+$$\alpha = 2\,\sin^{-1} (1 / f_R)$$
+
+Thus, $\alpha$ depends only upon the \emph{focal length ratio}.
+
 \subsubsection{Detector Array Size}
 In general, you do not need to be concerned with the detector array
 size. It is automatically calculated by \ctsim.  The size of the
diff --git a/doc/ctsim.tex b/doc/ctsim.tex
index 7501625..c86d1d5 100644
--- a/doc/ctsim.tex
+++ b/doc/ctsim.tex
@@ -10,6 +10,7 @@
 \usepackage{hyperref}
 \input{psbox.tex}
 
+\includeonly{ctsim-concepts,ctsim-install,ctsim-gui,ctsim-textui,ctsim-web,ctsim-appendix}
 \hyphenation{poly-gon-al}
 
 \newcommand{\ctsim}{\texttt{CTSim}}
@@ -29,7 +30,7 @@
 %\backgroundcolour{255;255;255}\textcolour{0;0;0}% Has an effect in HTML only
 \winhelpignore{\title{CTSim 3.0 User Manual}%
 \author{Kevin Rosenberg, M.D.}%
-\date{January 2001}%
+\date{February 2001}%
 }%
 \winhelponly{\title{CTSim 3.0 User Manual}%
 \author{by Kevin Rosenberg, M.D.\\$$\image{3cm;3cm}{logo-huge.bmp}$$}%