Radiographic studies of the chest during changes in posture and lower body negative pressure.
D001274:Atmospheric Pressure; D003964:Diaphragm / Q000000981:diagnostic imaging; D004562:Electrocardiography; D006321:Heart / Q000000981:diagnostic imaging; D006801:Humans; D007866:Leg / Q000098:blood supply; D011187:Posture; D011651:Pulmonary Artery; D013902:Radiography, Thoracic; D013147:Spirometry; D013679:Technology, Radiologic; D013909:Thorax / Q000098:blood supply