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Table 1 Definition of the parameters of CT perfusion

From: Correlation between musculoskeletal mass and perfusion in patients with gastrointestinal malignancy: a preliminary study based on quantitative CT and CT perfusion

Abbreviations Variable Description Standard unit
BF Blood flow the blood volume flowing across the given volume of tissue per minute ml/(100 mL·min)
BV Blood volume the total blood volume flowing across the given volume of tissue ml/100 ml
MTT Mean transit time the mean time taken for blood to flow from the artery to the vein s
TTS Time to start the time to the start of enhancement in a given region s
TTD Time to drain the time from the maximum enhancement to the end of enhancement in a given region s
Tmax Time to maximum the time from the start to the maximal enhancement in a given region s
FE Flow extraction product the blood volume from the intravascular to the extravascular space flowing across the given volume of tissue per minute ml/(100 mL·min)