| PRR | proton relaxation rate; pulse repetition rate |
|---|---|
| PSC | patient services coordination; Porter-Silber chromogen; posterior subcapsular cataract; primary scle... |
| PTM | posterior trabecular meshwork; posttransfusion mononucleosis; post-traumatic meningitis; prothymosin... |
| PTP | pancreatic thread protein; percutaneous transhepatic portography; physical treatment planning; poste... |
| PVR | peripheral vascular resistance; perspective volume rendering; poliovirus receptor; postvoiding resid... |