X-Git-Url: http://git.kpe.io/?a=blobdiff_plain;f=doc%2Fctsim-concepts.tex;fp=doc%2Fctsim-concepts.tex;h=64a870dc1a88fe545610fa531d4d414966ea585f;hb=17f20398d8bb0e4b97b5884b999bbe8d58c5254f;hp=29a0fad3b1d294fc0f2819c0c22ced9fd42a3f35;hpb=4ab75eaf538f5b42cf86830e44eee70590cd8c9a;p=ctsim.git diff --git a/doc/ctsim-concepts.tex b/doc/ctsim-concepts.tex index 29a0fad..64a870d 100644 --- a/doc/ctsim-concepts.tex +++ b/doc/ctsim-concepts.tex @@ -194,7 +194,7 @@ physically impossible and it analagous to have having the x-ray source inside of the \emph{view diameter}. -\subsection{Parallel Geometry}\label{geometryparallel}\index{Parallel geometry} +\subsection{Parallel Geometry}\label{geometryparallel}\index{Parallel geometry}\index{Scanner!Parallel} The simplest geometry, parallel, was used in \mbox{$1^{st}$} generation scanners. As mentioned above, the focal length is not used in this simple @@ -208,6 +208,7 @@ significant distortions will occur. \subsection{Divergent Geometries}\label{geometrydivergent}\index{Equilinear geometry}\index{Equiangular geometry} +\index{Scanner!Equilinear}\index{Scanner!Equiangular} \subsubsection{Overview} Next consider the case of equilinear (second generation) and equiangular (third, fourth, and fifth generation) geometries. In these cases, @@ -347,7 +348,7 @@ Backprojection is the process of ``smearing'' the filtered projections over the reconstructing image. Various levels of interpolation can be specified. -\section{Image Comparison}\index{Image comparison} +\section{Image Comparison}\label{conceptimagecompare}\index{Image!Comparison} Images can be compared statistically. Three measurements can be calculated by \ctsim. They are taken from the standard measurements used by Herman\cite{HERMAN80}. They are: