I am unsure of my University's stance on copyrighted images when using images in Lt - what should I do?

If you are unsure whether you can use an image within Lt, you should consult your Institute's / Company's Copyright Policy - ADInstruments cannot comment of the copyright status of individual images.
However, several websites offer copyright-free, public domain images that do not require citation or permission regardless of their intended usage. Some of these sites are listed below (please note ADInstruments is not responsible for the content of external websites):
Pixabay (https://pixabay.com/)
Pexels (https://www.pexels.com/)