Should we make the FDK imports all consistent in the 1 - Intro folder

[lauramurgatroyd]

We could update them all to import from the recon module so that it's less confusing?

[gfardell]

I don't think it's bad to show multiple versions. Ideally we'd have recon.FDK/FBP and could use astra or tigre backends. But that's not the position we are in (no astra, recon.FDK). It is confusing to people that the "same" algorithm is in 3 places in CIL though.

I think for any one training we might want to be consistent, but I'm not sure we should use the same everywhere.

Perhaps we could be explicit:

• "This uses the FBP algorithm implemented by ASTRA"
• "This uses the FBP algorithm implemented by TIGRE"
• "This uses the FBP algorithm implemented by CIL, using the tigre backend"

I know it's still confusing, but at least the information is there.

[lauramurgatroyd]

In my PR I had already updated it to use the recon module everywhere., but it can be changed.

How do we make sure we're consistent in one training without updating it everywhere? The online training will be using all of the notebooks touched in the PR