From: A review on chest CT scanning parameters implemented in COVID-19 patients: bringing low-dose CT protocols into play
Dose index
Mathematical formula
Weighted CTDI [37]
CTDIw (mGy) = 1/3 CTDI100,center + 2/3 CTDI100,periphery
Volumetric CTDI [37]
CTDIv (mGy) = CTDIw/pitch
DLP [38]
CTDIv × scan length (mGy × cm)