| fMRI | functional magnetic resonance imaging |
|---|---|
| FNS | frontier nursing service; functional neuromuscular stimulation |
| FOB | fecal occult blood; feet out of bed; fiberoptic bronchoscopy; foot of bed; functional observational ... |
| FRFC | functional renal failure of cirrhosis |
| FRP | follicle-stimulating hormone releasing protein; functional refractory period |