T380 beef US for image heterogeneities

[frisograce]

Please check the following before creating the pull request (PR):

• Did you run automatic tests?
• Did you run manual tests?
• Is the code provided in the PR still backwards compatible to previous SIMPA versions?

List any specific code review questions
I currently really like the way the example looks, but if there are any suggestions I'm all ears :)
Is there a reason why so many of the doc files have been updated? I have changed very few files.

List any special testing requirements
Please ensure this works on all different machines (especially checking on windows could be a good idea).

Provide issue / feature request fixed by this PR

Fixes #380

[frisograce]

I have just written a brief protocol describing how we did took the scans and how i then processed the data. Please could people let me know if anything needs to be more detailed, requires reformatting or any other detail should be added (eg how should I credit the scans?)