There are multiple definitions:

1. fast-acquisition multi-echo(English)

   • MRI
   • Imaging, Medical imaging
   • http://ee-class…or_acronyms.pdf

2. Fractional flow reserve versus Angiography for Multivessel Evaluation(English)

   • a trial concerning coronary stenosis
   • FFR, CAD
   • Coronary circulation, Cardiology, Clinical trials, Diagnostics, Medical imaging
   • https://doi.org…ahj.2007.06.012