"focal neurological deficit(s)"
"A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z - misc"
"FAMMM: familial atypical multiple mole melanoma syndrome"
"F"
"French gauge"
"Fourier-acquired steady state"
"Fat sat: fat saturation"
"Fax: facsimile"
"Fe: iron (Latin: ferrum)"
"FeNO: fractional exhaled nitric oxide"
"FHx: family history"
"FiNA: fine needle aspiration"
"FiO2: fraction of inspired oxygen"
"Fluoro: fluoroscopy"
"Fr: French gauge"
"F/S: frames/second"
"Fourier transform"
"FtBTCS: focal to bilateral tonic-clonic seizure"
"F/U: follow-up"
"Fx: fracture"
"FA"
"FABER: flexion, abduction, and external rotation manoeuvre"
"FACR: Fellow of the American College of Radiology"
"FAF: fissula ante fenestram"
"FAI"
"FAIR: flow sensitive alternating inversion recovery"
"FALD: Fontan-associated liver disease"
"FAMLI: Fetal Age Machine Learning Initiative"
"FAMMM: familial atypical multiple mole melanoma syndrome"
"FAP"
"FAPI: fibroblast activation protein inhibitor (in PET CT)"
"FAS"
"FASD: fetal alcohol spectrum disorders"
"FASI: focal areas of signal intensity"
"FAST"
"FATWO: Female Adnexal Tumour of Probable Wolffian Origin"
"FAVA: fibroadipose vascular anomaly"
"FAX: ferrous-agarose-xylenol"
"FB: foreign body"
"FBC: full blood count"
"FBG: fasting blood glucose"
"FBOA: foreign body obstructed airway"
"FBMS: fasting metabolic bone studies"
"FCC: fibrocystic change"
"FCD"
"FCL: fibular collateral ligament"
"FCMD: Fukuyama congenital muscular dystrophy"
"FC Rad Diag(SA): Fellowship of the College of Radiologists of South Africa"
"FC Rad Diag(SA): Fellowship of the College of Radiologists of South Africa"
"FCRB: flexor carpi radialis brevis vel profundus"
"FCS: furin cleavage site"
"FCSEMS: fully covered self-expanding metal stent"
"FD"
"FDA: Food and Drug Administration (a federal agency of United States)"
"FDL: flexor digitorum longus"
"FDP"
"FDS"
"FE: flexion-extension"
"FEA: flat epithelial atypia"
"FEP: first ever (or episode) psychosis"
"FES"
"FESS: functional endoscopic sinus surgery"
"FEVAR: fenestrated endovascular aortic repair"
"FFA: free fatty acids"
"FFD: fixed flexion deformity"
"FFI: focal fatty infiltration"
"FFL: fabellofibular ligament"
"FFP: fresh frozen plasma"
"FFR: fractional flow reserve"
"FFS: focal fatty sparing"
"FFSH: fall from standing height"
"FGC: fibreglass cast"
"FGI: fluoroscopically guided intervention"
"FGR: fetal growth restriction"
"FH"
"FHM: fetal heart motion"
"FHR: fetal heart rate"
"FHS: fetal heart sounds"
"FI"
"FIAS: focal impaired aware seizure"
"FIB-4: fibrosis index based on four factors"
"FID: free induction decay"
"FIF: forced inspiratory flow"
"FIFO: first in first out"
"FIRE: framework for image reconstruction environments"
"FIRES: febrile infection-related epilepsy syndrome"
"FIT: faecal immunochemical test"
"FJ: facet joint"
"FL: femur length (obstetric USS)"
"FL: femur length (obstetric USS)"
"FLAMES: FLAIR-hyperintense lesions in anti-MOG associated encephalitis with seizures"
"FLASH: fast low angle shot"
"FLC: fibrolamellar carcinoma"
"FLCN-S: folliculin gene-associated syndrome"
"FLI: flu-like illness"
"FLIS: functional liver imaging score"
"FLNA: filamin A"
"FLR: future liver remnant"
"FLS: flu-like symptoms"
"FLT: fluorescence tomography"
"FLUS: follicular lesion of undetermined significance"
"FM"
"FMD"
"FMDS: ferromagnetic detection systems"
"FMF: familial Mediterranean fever"
"FMISO: 18 fluoromisonidazole"
"FMS: fibromyalgia syndrome"
"FN"
"FNA: fine needle aspiration"
"FNAB: fine needle aspiration biopsy"
"FNAC: fine needle aspiration cytology"
"FND"
"FNE: fibreoptic nasoendoscopy"
"FNH: focal nodular hyperplasia"
"FNMR: Fédération Nationale des Médecins Radiologues (French radiologists' union)"
"FO: foramen ovale"
"FOB"
"FOBT: faecal occult blood test"
"FOIL: Freedom of Information Law"
"FOLFOX: leucovorin (FOLinic acid), Fluorouracil, OXaliplatin"
"FOM: floor of mouth"
"FONA: front of neck access"
"FONAR: field focussing nuclear magnetic resonance"
"FOOSH: fall on outstretched hand"
"FOSIT: feeling of something in the throat"
"FOSTER: Fight Osteosarcoma Through European Research"
"FOV: field of view"
"FP"
"FPA: functioning pituitary adenoma"
"FPIES: food protein-induced enterocolitis syndrome"
"FPS-R: faces pain scale-revised"
"FRANZCR: Fellow of the Royal Australian and New Zealand College of Radiologists"
"FRC: functional residual capacity"
"FRCR: Fellow of the Royal College of Radiologists"
"FRI: fracture-related infection (osteomyelitis)"
"FROEM: full range of eye movements"
"FROM: full range of movement"
"FS"
"FSC: ferric-sorbitol-citrate complex"
"FSE: fast spin echo"
"FSH: follicle-stimulating hormone"
"FSHD: facioscapulohumeral muscular dystrophy"
"FSP: front seat passenger"
"FT"
"FTA: failed to attend"
"FTC: follicular thyroid cancer"
"FTD: frontotemporal dementia"
"FTP: feature positive plaque"
"FTS: first trimester screening"
"FT-UMP: follicular tumours of uncertain malignant potential (thyroid)"
"FU: fluorouracil"
"FUEL: FLAIR-variable unilateral enhancement of the leptomeninges"
"FUO: fever of unknown origin"
"FURS: flexible ureteroscopy"
"FV: femoral vein"
"FVC: forced vital capacity"
"FVL: factor V Leiden (V=5, Roman numeral)"
"FWHM: full width at half maximum"
"FWT: full ward test (urine)"
"FALD: Fontan-associated liver disease"
"FAMLI: Fetal Age Machine Learning Initiative"
"FATWO: Female Adnexal Tumour of Probable Wolffian Origin"
"FDA: Food and Drug Administration (a federal agency of United States)"
"FNMR: Fédération Nationale des Médecins Radiologues (French radiologists' union)"
"FOIL: Freedom of Information Law"
"FOSTER: Fight Osteosarcoma Through European Research"
"FISP: fast imaging with steady-state precession"