Table 1 Nomenclature of the kinetic indices for myocardial ¹²³I-MIBG scintigraphy

iUp (min⁻¹)

Transfer rate of ¹²³I-MIBG from plasma to trapping in the terminals

iLoss (min⁻¹)

Loss rate relative to the trapped ¹²³I-MIBG

iNs (unitless)

Non-specific distribution of ¹²³I-MIBG in the myocardial interstitial fluid

iUp/iLoss

A composite DPS index of the specific distribution of ¹²³I-MIBG

eHMR

Heart-to-mediastinum ratio (early: 10–15 min)

dHMR

Heart-to-mediastinum ratio (delayed: 190–195 min)

WR

Washout rate of hROI (mROI counts subtracted and decay-corrected)