Table 1.

HistoQC modules.

Module name	Targeted artifact or metric
Basic Module	WSI magnification, file pyramid levels and microns per pixel
Light Dark Module	Identify tissue location and folded tissue
Classification Module	Identify pen marking, cover slip and cracks
Bubble Region By Region	Demarcate contours of air bubbles on WSIs
Bright Contrast Module	Overall and per channel tissue brightness, indicating stain/scan variations
Blur Detection Module	Identifies out of focus WSI regions