[On the value of filling the stomach with gaseous substances in descending urography in children].
D005740:Gases; D006801:Humans; D013270:Stomach / Q000000981:diagnostic imaging*; D014566:Urogenital System / Q000000981:diagnostic imaging*; D014567:Urography
D005740:Gases
STOMACH/radiography; UROGENITAL SYSTEM/radiography