| iodine-123 | <radiobiology> A radioisotope of iodine with a 159 keV gamma emission and a physical half-life of 13.2 hr, frequently used for studies of thyroid disease and of renal function. (05 Mar 2000) |
|---|---|
| iodohippurate sodium | Sodium o-iodohippurate;a radiopaque compound formerly used intravenously, orally, or for retrograde urography. When tagged with iodine-131, it was used to measure effective renal plasma flow and to image the kidneys for radioisotopic renography. (05 Mar 2000) |