Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Hardware is partially visualized in the lumbar spine . Lung volumes are low . There is a retrocardiac opacity which is compatible with known large hiatal hernia as seen on prior CT . There are bibasilar opacities which may represent atelectasis , difficult to exclude an early pneumonia . No large pleural effusion or pneumothorax is seen . Mild central congestion is likely present without frank pulmonary edema . Bony structures appear demineralized though grossly intact . A chronic appearing right humeral head deformity is noted .
    OUTPUT:
    
Pulmonary vascular congestion with bibasilar atelectasis , difficult to exclude pneumonia . Large hiatal hernia .