title: Pulmonary ventilation in children. Digital subtraction study.
mesh_terms: D000792:Angiography / Q000379:methods; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008168:Lung / Q000000981:diagnostic imaging*; D008297:Male; D013382:Subtraction Technique; D014692:Ventilation-Perfusion Ratio