There are multiple definitions:

1. impedance plethysmography(English)

   • DTV
   • Impedance/bioimpedance

2. implantable pulse generator(English)

   • DBS, BFMDRS, GPi, iMRI, MRI, STN
   • Bioengineering
   • https://doi.org…014.6.PEDS13605

3. interphase gap(English)

   • increase of this gap reflects spiral ganglion neuron density
   • AGF, ECAP, SGN
   • Signal analysis
   • https://doi.org…res.2016.08.002