There are multiple definitions:

1. recirculated systemic flow(English)

   • RPF, SF
   • Hemodynamics

2. ROI-spread-function(English)

   • ROI
   • Medical imaging

3. random survival forest(English)

   • an advanced ensemble machine learning method, extending Random Forests for survival analysis (time-to-event data with censoring) by building many de-correlated survival trees, averaging their predictions for improved accuracy, handling complex data (high-dimensional, non-linearities), and identifying important risk factors
   • CPHR, GBS, HF, HFpEF, ML, PTFR
   • Statistics, Machine learning, Cardiology
   • https://doi.org…872-025-05165-x
   • https://doi.org….12.17.25342526