| RTU | real-time ultrasonography; relative time unit; renal transplantation unit |
|---|---|
| CT | calcitonin; calf testis; cardiac tamponade; cardiothoracic [ratio]; carotid tracing; carpal tunnel; ... |
| PTT | partial thromboplastin time; particle transport time; posterior tibial tendon (transfer); prothrombi... |
| NRT | near-real time |
| RTS | real time scan; Rett syndrome; revised trauma score; right toestrike; Rothmund-Thomson syndrome; Rub... |