3 This program is written by Kevin M. Rosenberg, M.D.
5 It is covered by the GNU General Public License (GPL) which
6 allows copying and modifying this code with restrictions. See the
7 file COPYING for complete details.
13 CTSim development began in 1983 while I was in medical school. It was
14 written using Lattice C and MS-DOS. I used assembly language to write
15 directly to an IBM EGA video adapter.
17 In 1999, I ported CTsim to GNU/Linux. In April 2000, the source code
18 for CTSim was published on the Internet.
20 In June 2000, entire code for revised and converted to C++.
26 The official home for CTsim is http://www.ctsim.org. From this site,
27 you can download the CTsim source code and use CTSim online using a
30 I would be very pleased to have other developers join me in the
31 development of CTSim. Please see the TODO list for the most obvious
38 CTSim simulates the collection of x-rays by a CT scanner. These x-rays
39 of objects are called projections.
41 Phantom objects are defined. Several built-in phantoms are included,
42 as well as an extension to load files of phantom definitions.
44 CTsim uses cross-platform compatible file formats for projection data and
51 ctsim - a graphical user interface for most functions. This programs
52 has all of the functionality of the command line tools except for
53 image comparison functions.
55 phm2if - generates an image file of a phantom object
57 phm2pj - Simulates the collection of CT data, or projections, of a
60 pjrec - Performs an CT reconstruction, also known as image
61 reconstruction from projections. Reads a projection file and writes a
64 pj2if - Converts projection data to a raw sinugram image
66 if2img - Converts an image file to a variety of 8-bit and 16-bit image
69 pjinfo - Show information on a projection file
71 ifinfo - Show statistics and history labels of image files
77 Graphical User Interface
78 ------------------------
83 Command Line Interface
84 ----------------------
86 When evaluating CT simulation, in general, these steps are followed:
88 Create a phantom image and viewable image file
92 Simulate CT data collection and create a viewable image of raw projections
97 Perform CT reconstruction and create viewable image file
101 Display image information and comparative statistics
104 There is a sample shell script installed called 'sample-ctsim.sh'
105 in the tools direction that performs the above commands.
107 These functions can be invoked via a web interface with a CGI program
108 as described in the INSTALL file.
114 Please enjoy CTSim. I'd like to hear any feedback
116 Kevin M. Rosenberg, M.D.