There are multiple definitions:

1. Iternational Critical Tables(English)

   • classic reference (originally published in 1926 for the National Research Council), containing critical data on inorganic and organic compounds, and pure substances
   • Standards, Biochemistry, Biophysics
   • https://app.kno…viewerType:toc/

2. Information and Communication Technology(English)

   • Data exchange

3. isovolumic contraction time(English)

   • see Tei index = (ICT + IRT) / ET
   • DFP, DCT, ET, IRT, RR
   • Cardiology, Ratio-based metric

4. índice cardiotorácico(Spanish)

   • que representa una relación anatómica interna entre el tamaño del corazón y del tórax que se calcula en una radiografía. Cardiothoracic ratio (EN)
   • CTR
   • Cardiology