There are multiple definitions:

1. ratio of fibrosis(English)

   • calculated as the percentage area of the entire field and the smooth muscle actin positive area
   • ALBI, CPS, EOB-MRI, ICGR15, ROS, SMA
   • Liver disease, Ratio-based metric, Pathology
   • https://doi.org…2072-018-9874-x

2. range of flexion(English)

   • PCO, ROM, TKA
   • Musculoskeletal system, Skeleton and bone (formation), Orthopedics
   • http://pubmed.n…h.gov/21351608/