2 Added support for 64-bit (IA64) CPU
3 Removed broken B-spline interpolation
4 Added support for cygwin platform under Windows 2000
5 Added support for 16-bit PNG graphics
8 Added compile-time configuration of endian order
11 Modified the raysum file format to be platform independent
14 Added Microsoft VC compatibility
15 Cleaned up compilation warnings in libgraph
18 Continued conversion to ANSI C
19 Removed old CRT routines
22 Renamed pictures to phantoms, objects to phantom elements
23 Continued code cleanup
26 More code cleanup with reorganizing libraries
27 Added --log and --exp to sdf-1
28 Allowed negative numbers for window levels in CGI interface
31 Continued code cleanup
35 Better documented, coded raysum in-memory on on-disk options
38 Cleaned out library that wasn't being used by CTSim
39 Modified ctsim.cgi to read in configuration file ctsim.conf
42 First open source distribution for GNU/Linux
45 Converted to GNU/Linux
46 added MPI support via LAM library
49 Developed under MS-DOS and IBM EGA graphics