radiography of the mediastinum after injection of air (artificial pneumomediastinum), an obsolete procedure.
Farlex Partner Medical Dictionary © Farlex 2012
gas mediastinographyA near-extinct technique used in diagnostic radiology, which consists of injecting a gas—e.g., nitrous oxide—into the mediastinum to enhance the imaging of certain structures; CT (computed tomography), and more recently MRI (magnetic resonance imaging), are the best techniques for evaluating anatomic abnormalities of the mediastinum.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.