Cross-Referencing to Another Image

It is sometimes useful to see the slices positions of one image viewed on another image (the reference image) so that their position relative to anatomical structures can be judged. The slice positions are "cross-referenced" to another image. To do this within Jim, select "Reference Image" from the "View" menu:

This brings up reference image display:

Load the reference image into the reference image display, and the positions of the slices for the image in the main display will be shown on the reference image.

The slice positions will be shown in one of two modes, selected from the "View" menu of the reference image dialog

• Slice centre display. The centre of the slice is shown as a blue line, as below for axial slices cross-referenced to a sagittal localiser:

  

• Slice box display. The boundaries of the slice are shown as a blue box, as below for axial slices cross-referenced to a sagittal localiser:

  

In either case, the individual slices are shown in blue. However, if you have a slice selected in the main displayed image, the selected slice is shown in yellow on the cross-referenced image. If you also want to see the positions of the slices of the cross-referenced image on the main displayed image, then select the check box.

Note: for cross-referencing to work properly, two conditions must be met.

1. The images must have come from a fairly modern source, otherwise the information required to cross-reference images may not be present.
2. If you converted the images into NIFTI or UNC format, the image conversion must have been done using Jim Version 6.0 or later, or again the information required for reliable cross-referencing will not be present.

When you have finished with the cross-referenced image, click on the button.