1 \documentstyle[a4,makeidx,verbatim,texhelp,fancyhea,mysober,mytitle]{report}%
6 \newcommand{\ctsim}{{\tt CTSim}}
7 \newcommand{\ctsimtext}{{\tt CTSimText}}
8 \newcommand{\usage}{{\bf Usage}{\par}}
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17 %\backgroundcolour{255;255;255}\textcolour{0;0;0}% Has an effect in HTML only
18 \winhelpignore{\title{Manual for CTSim 3.0}%
19 \author{Kevin Rosenberg, M.D.}%
22 \winhelponly{\title{Manual for CTSim 3.0}%
23 \author{by Kevin Rosenberg, M.D.\\$$\image{3cm;3cm}{logo-huge.bmp}$$}%
28 \pagestyle{fancyplain}%
29 \bibliographystyle{plain}%
30 \pagenumbering{roman}%
32 \setheader{{\it CONTENTS}}{}{}{}{}{{\it CONTENTS}}%
33 \setfooter{\thepage}{}{}{}{}{\thepage}%
36 \chapter*{Copyright notice}%
37 \setheader{{\it COPYRIGHT}}{}{}{}{}{{\it COPYRIGHT}}%
38 \setfooter{\thepage}{}{}{}{}{\thepage}%
40 Copyright (c) 1983-2001 Kevin Rosenberg, M.D.
42 Permission to use, copy, modify, and distribute this software and its
43 documentation for any purpose is hereby granted without fee, provided that the
44 above copyright notice, author statement and this permission notice appear in
45 all copies of this software and related documentation.
47 THE SOFTWARE IS PROVIDED ``AS-IS'' AND WITHOUT WARRANTY OF ANY KIND, EXPRESS,
48 IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF
49 MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
51 IN NO EVENT SHALL KEVIN ROSENBERG BE LIABLE FOR ANY
52 SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR
53 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
54 WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY
55 OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
56 PERFORMANCE OF THIS SOFTWARE.
58 \chapter{Introduction}\label{introduction}%
59 \pagenumbering{arabic}%
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63 \winhelponly{$$\image{3cm;3cm}{logo-huge}$$}%
65 Computed Tomography is a technique for estimating the interior of an object
66 from measurement of radiation collected around the object. This radiation
67 can be either projected through or emitted from the object.
68 \rtfsp\ctsim\ simulates the process of projecting X-rays through a phantom object.
69 \rtfsp\ctsim\ can then reconstruct the interior of the object from the projections
70 collected around the phantom object.
72 The \ctsim\ package has two executable files: the graphical \helprefn{ctsim}{ctsim} and text \helprefn{ctsimtext}{ctsimtext} programs.
74 \chapter{Installation}\index{Installation}%
75 \setheader{{\it CHAPTER \thechapter}}{}{}{}{}{{\it CHAPTER \thechapter}}%
76 \setfooter{\thepage}{}{}{}{}{\thepage}%
78 \section{Download}\label{download}\index{Installation,Download}%
80 The latest version of CTSim, plus source code, can be accessed from:
87 It is available in Windows 95/NT/2000 and Linux GUI versions and non-GUI versions.
89 \section{Installing Linux RPM}\index{Installation,Linux}%
91 \section{Installing Windows Binary}\index{Installation,Windows}%
93 \section{Build From Sources}\label{build}\index{Installation,Build}%
95 See the INSTALL file included in the source distribution for instructions.
97 \section{Requirements}\label{installreq}\index{Installation,Requirements}%
98 \begin{itemize}\itemsep=0pt
99 \item zlib Library (optional)
100 \par Used for PNG file export.
102 \item libpng Library (optional)
103 \par Used for PNG file export.
106 \item FFTW library (optional)
107 \par Used for frequency-based filtering and fourier transformations of images.
110 \item readline library (optional)
111 /par Used for {/ctsimtext} interactive shell.
113 \item dmalloc library (optional)
114 \par Used for debugging memory allocation
117 \item wxWindows library (optional)
118 \par Used for platform-independent graphical interface. The graphical-shell
119 program \ctsim\ requires this library.
120 \par www.wxwindows.org
124 \chapter{ctsim - the Graphical User Interface}\label{ctsim}\index{ctsim}%
125 \setheader{{\it CHAPTER \thechapter}}{}{}{}{}{{\it CHAPTER \thechapter}}%
126 \setfooter{\thepage}{}{}{}{}{\thepage}%
128 \ctsim\ is the graphical shell for the CTSim project. It is
129 written using the wxLibrary for cross-platform compatibility with GTK,
130 Motif, and Microsoft Windows. It includes all of the functionality of
131 the command-line tool {\tt ctsimtext} as well as image processing and visualization features.
133 \ctsim\ can open projection files, image files, phantom definition files, and plotfiles.
136 ctsim [OPTIONS] [files to open...]
138 \chapter{ctsimtext}\label{ctsimtext}\index{ctsimtext}%
139 \setheader{{\it CHAPTER \thechapter}}{}{}{}{}{{\it CHAPTER \thechapter}}%
140 \setfooter{\thepage}{}{}{}{}{\thepage}%
142 \ctsimtext\ is a master shell for all of the command-line utilities.
145 \ctsimtext\ can be executed without any parameters. In that case, \ctsimtext
146 offers a command-line to enter the function-names and their parameters. The output of the command is displayed. Further commands may be given to \ctsimtext. The shell is exited by the {\tt quit} command.
148 \ctsimtext\ can also be called to execute a single command. This is especially useful for batch files containing multiple \ctsimtext\ commands. This is invoked by calling {\tt ctsimtext function-name parameters...}.
150 The following function names are available:
152 \helprefn{if1}{if1}\par
153 \helprefn{if2}{if2}\par
154 \helprefn{ifexport}{ifexport}\par
155 \helprefn{ifinfo}{ifinfo}\par
156 \helprefn{phm2if}{phm2if}\par
157 \helprefn{phm2pj}{phm2pj}\par
158 \helprefn{pj2if}{pj2if}\par
159 \helprefn{pjinfo}{pjinfo}\par
160 \helprefn{pjrej}{pjrec}\par
162 \subsection{if1}\label{if1}\index{ctsimtext,if1}%
163 Perfoms math functions on a single image.
166 \begin{itemize}\itemsep=0pt
174 \subsection{if2}\label{if2}\index{ctsimtext,if2}%
175 Perfoms math functions on a two images.
178 \begin{itemize}\itemsep=0pt
187 \subsection{ifexport}\label{ifexport}\index{ctsimtext,ifexport}%
188 Export an imagefile to a standard graphics file.
191 \begin{itemize}\itemsep=0pt
193 \begin{itemize}\itemsep=0pt
200 \begin{itemize}\itemsep=0pt
206 \begin{itemize}\itemsep=0pt
219 \subsection{ifinfo}\label{ifinfo}\index{ctsimtext,ifinfo}%
221 Displays information about an imagefile.
224 \begin{itemize}\itemsep=0pt
232 \subsection{phm2pj}\label{phm2pj}\index{ctsimtext,phm2pj}%
233 Simulates collection of X-rays data (projections) around a phantom object.
236 phm2pj projection-file-name number-of-detectors number-of-views [options...]
237 \begin{itemize}\itemsep=0pt
239 Select a standard phantom
240 \begin{itemize}\itemsep=0pt
248 Load a phantom definition definition
251 \begin{itemize}\itemsep=0pt
258 Number of samples per each detector
261 Sets the rotation amount as a multiple of pi. For parallel geometries use
262 a rotation angle of 1 and for equilinear and equiangular geometries use a rotation angle of 2.
264 \item --field-of-view
265 Sets the field of view as a ratio of the diameter of the phantom. For parallel geometries, using a value of 1.0 is fine. For other geometies, this should be at least 1.3 to avoid artifacts.
268 Sets the distance of the radiation source and detectors from the center of the object as a ratio of the radius of the object. For parallel geometries, a value of 1.0 is fine. For other geometries, this should be at least 2.0 to avoid artifacts.
271 The Herman phantom is taken with permission from Gabor Hermans 1980 book\cite{HERMAN80}. The Shepp-Logan phantom was published in 1974\cite{SHEPP74}.
273 \subsection{phm2if}\label{phm2if}\index{ctsimtext,phm2if}%
274 Converts a geometric phantom object into an imagefile. The size of the
275 imagefile in pixels must be specified as well as the number of samples
276 to average per pixel.
279 \begin{itemize}\itemsep=0pt
283 \subsection{pj2if}\label{pj2if}\index{ctsimtext,pj2if}%
284 Convert a projection file into an imagefile.
287 \begin{itemize}\itemsep=0pt
290 \subsection{pjinfo}\label{pjinfo}\index{ctsimtext,pjinfo}%
291 Displays information about a projection file.
294 \begin{itemize}\itemsep=0pt
302 \subsection{pjrec}\label{pjrec}\index{ctsimtext,pjrec}%
303 Reconstructs the interior of an object from a projection file.
306 \begin{itemize}\itemsep=0pt
308 Selects which filter to apply to each projection. To
309 properly reconstruct an image, this filter should be multiplied
310 by the absolute value of distance from zero frequency.
311 \begin{itemize}\itemsep=0pt
317 \item Filter Parameter \par
318 Sets the alpha level for Hamming
319 window. At setting of 0.54, this equals the Hanning window.
322 \begin{itemize}\itemsep=0pt
330 \item Filter Generation
331 \begin{itemize}\itemsep=0pt
333 \item inverse_fourier
337 \begin{itemize}\itemsep=0pt
343 \begin{itemize}\itemsep=0pt
353 \item Preinterpolation Factor
356 \chapter{The Web Browser CGI Interface}\label{webinterface}\index{Web Interface}%
357 \setheader{{\it CHAPTER \thechapter}}{}{}{}{}{{\it CHAPTER \thechapter}}%
358 \setfooter{\thepage}{}{}{}{}{\thepage}%
360 \section{Overview}\index{Web Interface,Overview}%
361 The CGI program {\tt ctsim.cgi} takes projections of a standard
362 phantom object, performs reconstruction, and then compares the
363 rasterized phantom object with the reconstruction. The comparison is
364 performed both visually by an image subtraction as well as by standard
365 statistics as described by Herman\cite{HERMAN80}.
367 \section{Requirements}\index{Web Interface,Requirements}%
368 \begin{itemize}\itemsep=0pt
369 \begin{itemize}\itemsep=0pt
370 \item Apache or other CGI compatible web server
372 \item Perl (version 4.0 or higher)
374 \item A client web browser than can display PNG files. Most
375 current web browsers support PNG.
380 \bibliographystyle{plain}
382 \addcontentsline{toc}{chapter}{Bibliography}
383 \setheader{{\it REFERENCES}}{}{}{}{}{{\it REFERENCES}}%
384 \setfooter{\thepage}{}{}{}{}{\thepage}%
386 \addcontentsline{toc}{chapter}{Index}
387 \setheader{{\it INDEX}}{}{}{}{}{{\it INDEX}}%
388 \setfooter{\thepage}{}{}{}{}{\thepage}%