Radiography using air, oxygen, or some other gas as a contrast medium.

Synonyms: Negative Contrast Radiography, Air Radiography, Negative Contrast Radiographies, Air Radiographies, Radiographies, Negative Contrast, Pneumoradiographies, Insufflation Radiography, Insufflation Radiographies, Radiographies, Insufflation, Radiography, Insufflation, Radiography, Negative Contrast, Contrast Radiographies, Negative, Pneumoradiography, Contrast Radiography, Negative, Radiography, Air, Radiographies, Air