There are multiple definitions:

1. modulation transfer function(English)

   • measurement of the microscope's ability to transfer contrast from the specimen to the intermediate image plane at a specific resolution
   • DQE, CTF, OTF, PTF, HA, LA, SMILE, FOZ
   • Signal analysis, Microscopy, Optics and vision
   • https://www.oly…atomy/mtfintro/
   • https://doi.org…123-021-00330-9

2. muscular thin film(English)

   • PDMS, PIPAAm, EC, FN
   • Biomaterials
   • https://doi.org…science.1146885

3. modulated transformer(English)

   • see bond graph
   • MGY
   • Transform

4. Musculoskeletal Transplant Foundation(English)

   • ST
   • Musculoskeletal system, Transplantation, Organizations (scientific)
   • https://doi.org…smr.2022.06.020