CTAN / CTVOL Software Package: Licensing SkyScan, October 2003, Aartselaar, Belgium. SkyScan's new software package, for image analysis and visualization of the micro-CT results, is supplied as one zip-file, which includes all the necessary components. Firstly unzip this file into any folder on your hard disk. Then start the CTan.exe - program for 2D / 3D processing and analysis. To make an automatic connection to the second program - CTvol (program for realistic 3D visualization) - define it in CTan as the "3D visualization program" in File -> Preferences -> Tools. Brief information about using the CTan and CTvol programs can be found in the supplied "Getting Started" document. The supplied software package can be used in one of three modes: 1. Demo mode with limited functionality, 2. Evaluation mode (one month) with full functionality, 3. Permanent mode with full functionality. In the first start of CTan, the software will operate in the Demo mode. This mode has limited functionality and does not allow saving analysis results to your disk. To move from Demo mode to Evaluation mode, send the Product ID number, which can be found in Help -> About CTAn (copy and paste it to the e-mail body) with your Name and Organization to the address sasov@skyscan.be and we will return you a licensing file "CTAn.lic" for free one month evaluation with full functionality. This file should be copied into the folder with CTan program, and in the next start the user should type his Product ID, Name and Organization in exactly the same way as it will be shown in the reply e-mail from SkyScan. Current users of SkyScan instruments and official SkyScan distributors can get the Permanent license file for unlimited usage of the software. All new instruments, shipped after the beginning of November 2003, will be supplied with the preinstalled Permanent version of the software. Other customers can get the Permanent license file against the payment for the software package. Please contact your local SkyScan distributor for payment details.