Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP portable upright radiograph demonstrates bilateral nodular opacities bilaterally about the hila are thought to reflect engorged central vessels . The heart is moderately enlarged , stable allowing for differences in radiographic technique when compared to prior study . No pulmonary edema . There is no large pleural effusion . There is no pneumothorax . Evaluation of the tracheostomy tube is limited secondary to overlying soft tissue density . Allowing for this , the tracheostomy appears in stable position when compared to prior study .
    OUTPUT:
    
Bibasilar opacities likely atelectasis , superimposed infection in the appropriate clinical setting is possible . Stable moderate cardiomegaly without pulmonary edema .