There are multiple definitions:

1. stenotic flow reserve(English)

   • DS, QCA
   • Coronary circulation, Ratio-based metric
   • https://www.sci…002870307800111

2. stress [myocardial blood] flow ratio(English)

   • Coronary circulation, Ratio-based metric
   • https://doi.org…rtj/ehab849.015

3. Swedish Fracture Register(English)

   • a unique national quality register where all orthopedic fractures, regardless of treatment, are registered
   • DRF, MFA, NPR, SF-36, SHR, SMFA
   • Injury, Musculoskeletal system, Registry
   • https://doi.org…891-021-04473-5
   • https://doi.org…891-022-05062-w

4. Swedish interactive thresholding algorithm FasteR(English)

   • a perimetric strategy
   • PSD, PTS, SFA, SITA, VFI
   • Ophthalmology
   • https://doi.org…55/2022/5675793

5. stone free rate(English)

   • PCNL, UMP, UTI
   • Nephrology, Quality and outcomes
   • https://doi.org…ol.20227509.111