Version 4.2 Released Mar 2003 * Direct Fourier Reconstructions now supported Version 4.0 Released Jan 2003 * Port to wxWindows 2.4 * Port to Mac OS X Version 3.5 Released May 2002 * New reconstruction technique: Interpolate divergent beams to parallel beams for faster reconstructions. * Multithreading for running length processes in background. Also takes advantage of multiple-CPU's in SMP systems for speed improvements with parallel processing. * Region of interest can be specified for reconstruction zooming. * Import PNG, PPM, and PGM images * DICOM file import/export * Clipboard for cutting and pasting images * Can read and reconstruct SIEMENS AR.STAR DICOM raw data files * Scattergram of T-Theta sampling. Useful for understanding divergent beam scanning. * Startup-tips to help new users learn features. * Ability to place detector at any arbitray position * Histogram plotting of projection files Version 3.0 New Features * Greatly improved dialog boxes * Online and print manuals with context-sensitive help! * 3-d rotating views of image files * Creation of arbitrary filter images * Cubic interpolation for reconstructions * All features of command line tools are now in graphical ctsim program! * Complex-valued image files now supported, lots of image math functions added including Fourier transformations * Visual and statistical image comparision functions * Plotting of row and column data of single and comparison images * Histogram Plotting of Image files. * Conversion of projections to polar images * Improved animation graphics * New Microsoft Windows compatible self-installer with explorer extensions to CTSim files Version 2.5 of CTSim has been released! New Features of CTSim version 2.5: - Now compiles with Microsoft Visual C++. - First Microsoft Windows graphical user interface - Bug fixes and modest documentation and program improvements over version 2.0 New Features of CTSim version 2.0: - Entire code-base cleaned up, re-written, and converted from C to C++. - Graphical user interface now included! Animation of projection and reconstruction processes. Displays projection and image files. Uses platform-independent wxWindows library so can run on UNIX and Microsoft Windows platforms. - Integrated G2 library for graphical display from command line tools (UNIX only) - Added frequency-based filtering. Can provide significant speed-up in reconstructions compared to convolution-based filtering. - Added highly-optimized backprojection method (idiff3) - New command-line tools added for image statistics and comparisons with both text and graphical outputs.