| PFR | parotid flow rate; peak flow rate |
|---|---|
| RBF | regional blood flow; regional bone mass; renal blood flow |
| CT | calcitonin; calf testis; cardiac tamponade; cardiothoracic [ratio]; carotid tracing; carpal tunnel; ... |
| TCF | tissue coding factor; total coronary flow; transcription factor |
| TF | free thyroxine; tactile fremitus; tail flick [reflex]; temperature factor; testicular feminization; ... |