Stacks are a set of sequential images that can be scrolled. Sequential images from cross-sectional modalities (e.g. CT/MRI) or time-resolved modalities (e.g. DSA) should be presented as a scrollable stack, rather than as multiple single images.
On this page:
Number of images
Stacks should ideally contain less than 100 images per stack. If you upload very large stacks not only is this unnecessary (very few teaching cases require thin slices) but it may make your case difficult to view for visitors who have slower connections.
If you only have thins, then select every second or third image to keep the overall number of images down.
Uploading Images
Save the files in the correct orientation and collimation with all overlay information removed or hidden. Use sequential names as detailed below.
zip sequentially numbered images for each stack
- upload the zip file in exactly the same way you would upload a single image
- use the list box under each stack to specify the appropriate plane/projection and sequence/contrast phase
How to create a zip file
- MacOS: highlight images, right click and select 'compress'
- Windows: highlight images, right click and 'send to compressed (zipped) folder'
Make sure the images are sequentially numbered, preferably with leading zeros (although this is not mandatory) as follows:
imagename001
imagename002
imagename003
...
imagename010
imagename011
The middle image within a stack is used as the thumbnail image by default. Often, this will not be a good representation of the pathology. Therefore, it is often helpful to select a specific different key image.
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