| RES | radionuclide esophageal scintigraphy; reticuloendothelial system |
|---|---|
| RN | radionuclide; red nucleus; Registered Nurse; registry number; residual nitrogen; reticular nucleus |
| RNA | radionuclide angiography; Registered Nurse Anesthetist; ribonucleic acid; rough, noncapsulated, avir... |
| RND | radical neck dissection; radionuclide dacryography; reactive neurotic depression |
| RNSC | radionuclide superior cavography |