There are multiple definitions:

1. lipidic plaque burden(English)

   • CAD, CAG, FFR, IEL, LCR, MLA, OCT, OFR, QCA, RWS, TCFA
   • Atherosclerosis /atherogenic, Medical imaging
   • https://doi.org…/EIJ-D-22-00537

2. left principal bronchus(English)

   • is increasingly recognized as an isolated entity
   • LB
   • Pulmonology, Veterinary medicine
   • https://doi.org…1111/jvim.16859