| PACS | DB picture archiving and communication system data base |
|---|---|
| PcB | near point of convergence to the intercentral base line [punctum convergens basalis] |
| PIOPED | Prospective Investigation of Pulmonary Embolism Diagnosis [data base] |
| Rb | Imp rubber base impression |
| SMB | selected mucosal biopsy; standard mineral base |