| APUD | Amine Precursor Uptake & Decarboxylation |
|---|---|
| 131I | radioactive Iodine(used in Thyroid uptake, Liver & Kidney Scans & Treatment of malignant & nonmalig... |
| RAIU | Radio-Active Iodine Uptake |
| RT3U | Resin T3 Uptake |
| AIU | absolute iodine uptake; antigen-inducing unit |