Fig. 1From: Deep learning for spirometry quality assurance with spirometric indices and curvesInput and output samples from Object Detection Module. a Suspect a cough in the flow–volume graph, an up-and-down flow spike is detected by the module; b Suspect obstructed mouthpiece or spirometer in the flow–volume graph, a flutter is detected by the module; c Suspect glottis closure in the flow–volume graph, a sharp drop is detected by the moduleBack to article page