| RFI | radiofrequency interference; recurrence-free interval; renal failure index |
|---|---|
| SDI | standard deviation interval; survey diagnostic instrument |
| STI | Scientific and Technical Information; serum trypsin inhibitor; soybean trypsin inhibitor; systolic t... |
| TI | inversion time; temporal integration; terminal ileum; thalassemia intermedia; therapeutic index; tho... |
| TID | time interval difference [imaging]; titrated initial dose |