There are multiple definitions:

1. bone volume fraction(English)

   • BMD, VB-vBMD
   • Medical imaging, Ratio-based metric
   • https://doi.org…55/2018/6284269

2. boundary vector flow(English)

   • is unable to extract acute concave shapes
   • GVF, MRI
   • Brain (dys)function, Medical imaging
   • https://doi.org…ME.2009.2012423

3. bioprosthetic valve failure(English)

   • may be caused by structural or nonstructural valve dysfunction, for example during valve-in-valve TAVI
   • BVD, TAVI
   • Cardiology, Prosthetics
   • https://doi.org…acc.2022.06.002

4. binocular visual field(English)

   • NEI VFQ-39, NEI, SAP, VFQ
   • Ophthalmology
   • https://doi.org…tha.2014.08.014