Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright AP view of the chest provided . There are bilateral partially layering pleural effusions , which appear similar to prior exam allowing for differences in patient positioning . Mild edema is difficult to exclude . Consolidations in the lower lungs are most compatible with compressive lower lobe atelectasis , though a superimposed pneumonia may be present . No definite signs of pneumothorax . Heart size can not be assessed . Mediastinal contour is suboptimally assessed due to patient rightward rotation . Bony structures appear intact .
    OUTPUT:
    
Mild pulmonary edema with bilateral pleural effusions , similar to prior , with lower lung consolidations , most likely compressive atelectasis versus pneumonia . Followup to resolution advised .