Loading the First Image Volume
The first image volume has the following special properties:
- No other images can be displayed until the first image volume has been loaded or imported
- All subsequent image volumes must have the same dimensions as the first image volume and will
be discarded if they do not
- Loading or importing a new first image volume will cause all other images to be discarded if they do not
match the dimensions of the newly loaded first image volume
- Only the first image volume can be modified or saved
Images must be in Analyze or MINC format to be loaded directly; all other file formats must be imported
rather than loaded. MultiTracer is able to automatically detect when Analyze image headers and
images need to be byteswapped, so images from PC's can be viewed on Sun workstations and vice versa.
MINC format files are stored in an intrinsically platform independent format.
To load the first volume image:
- From the main MultiTracer window "File" menu, choose "Open First Volume ..."
- In the "Open" dialog box, choose either the 'Analyze File Filter' or the 'MINC File Filter' depending on which type
of file you want to open.
- Select the .hdr file (for Analyze files) or .mnc file (for MINC files) that you want to open from the "Open" dialog box.
If the file is not in the current directory, the popup menu in the upper left of the dialogue
box will let you move up the directory tree, or you can double click on a subdirectory icon to
move down the directory tree.
- Once the file is selected, click the "Open" button in the dialogue box to load the file.
- Large files may take several seconds to load; a status bar may appear to show your progress.
- Once the file is loaded, the image should appear in the display region. If no prior image has
been loaded, MultiTracer will
automatically take you to a plane in the middle of the image and will adjust the intensity of the
display to a (usually) reasonable value. If the display appears black, this may reflect a problem with
the automatic intensity adjustment, and you may need to set the intensity manually.
If you have already loaded or imported a file and choose to load a new first image volume with different dimensions, any
tracings of structures will be discarded (you will be given a opportunity to save them first).
Nonetheless, it is always a good idea to save your traces
before you load or import a new image.
If you have previously loaded or imported a file and choose to load a new first image volume with the same dimensions, you
will be given the option to discard or to retain any existing traces.
©2001-2003 Roger P. Woods, M.D.
Modified: April 22, 2003