There are multiple definitions:

1. quality assurance(English)

   • ASQ, OOS, QC
   • Quality and outcomes, Standards
   • https://doi.org….1159/000528531

2. quantitative anisotropy(English)

   • quantity of water diffusion in an anisotropic fashion for fibers crossing brain areas
   • ACR, ALT, BLT, CC, DLPFC, DSI, DTI, FA, GFA, ISO, MMSE, mTBI, MSLT, NQA, SLF, QSDR
   • Medical imaging, Sleep medicine
   • https://doi.org…neur.2017.00616

3. quality assessment(English)

   • QI
   • Standards
   • https://doi.org…/09638239917184