There are multiple definitions:

1. cosmic microwave background(English)

   • refers to anisotropy
   • WMAP
   • Radiotherapy /radiation
   • https://doi.org…science.1082158

2. cerebral microbleed(English)

   • development is strongly associated with intracranial atherosclerosis
   • CMI, CVA, CICAS, ICAS, mRS, AIS, AFDAS, AMI, CAD, CAN, cTn, DAPT, ECG, ECNS, HF, ICH, ICNS, LAVI, LVV, SAH, SHS, SIHI, TTS, WMA
   • Cerebrovascular event, Atherosclerosis /atherogenic
   • https://doi.org…dis.2015.03.011
   • https://doi.org…acc.2020.10.009