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Table 1 Subjective evaluation standard of 5-point system

From: Application of CareDose 4D combined with Karl 3D technology in the low dose computed tomography for the follow-up of COVID-19

Score

GGO

Crazy-paving pattern

Five points

clear

clearly visible

Four points

clear

visible

Three points

visible

unclear

Two points

visible

blurred

One point

non-visible

unclear