| RO | PACS radiation oncology picture archiving and communication system |
|---|---|
| RPG | radiation protection guide; Report Program Generator[ PC language]; retrograde pyelogram; rheoplethy... |
| RRE | radiation-related eosinophilia |
| RSIC | Radiation Shielding Information Center |
| RSO | radiation safety officer; Resident Surgical Officer; right superior oblique [muscle] |