There are multiple definitions:

1. peripheral benzodiazepine receptor(English)

   • PD, PET, TSPO
   • Bioenergetics, Receptors

2. polybasic region(English)

   • Cell biology
   • https://doi.org…0/cells10071831

3. perfused boundary region(English)

   • indicates the dispersion and penetration depth of circulating RBCs into the endothelial glycocalyx layer
   • CVD, MVD, MVHS, PBR-HF, RBC, SDF, %RBC
   • Microcirculation, Erythrocyte, Microscopy
   • https://doi.org…JAHA.125.043562