DTI_Studio使用.doc

DTI StudioProcessing Tools and Environment for Diffusion Tensor Imaging Users GuideFor version 2.30 Hangyi Jiang, Ph.D. Susumu Mori, Ph.D. Radiology Department, Johns Hopkins University, SOM February, 2005 Introduction DTI Studio is a diffusion tensor image processing program running under Windows. It is suitable for such tasks as tensor calculation, color mapping, fiber tracking, and 3D visualization. Most of operations can be done with only a few clicks. Tools in the program can be grouped in the following way: Image Viewer Diffusion Tensor Calculations Fiber Tracking and Editing 3D Visualization Image File Management Region of Interesting (ROI) Drawing and Statistics Launching the program and hardware requirement DTI Studio is a rather small program, only few hundreds kilobytes in size. Once you get the software, you can simply copy it to your computer using Windows Explore. Although you are allowed to copy it to multiple computers, I recommend that you to register all users and PIs (principal investigators). Once you and your colleagues are registered, you’ll be included in our user list and we’ll notify you upgrade, modifications, and bugs. Diffusion image data files are usually very big and a large amount of RAM is needed for its processing. If you experience “Not Enough Memory” messages or the program suddenly quits in a middle of calculation, these are due to RAM shortage. More than 1GB RAM is recommended. If you have a computer with a lesser amount of RAM, there is a way to divide 3D volume data into smaller blocks, perform tensor calculation separately, and later combine them to restore the original 3D volume. This approach, however, doesn’t work for fiber tracking, which requires the entire 3D volume for the calculation. To start the program, you can simply double-click a DtiStudio icon. Almost immediately, the corresponding DTI Studio window appears like most Windows-based programs. At this moment, you are ready to play with the program. Image vie