Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiograph ___ at 15 :41 are submitted .
    OUTPUT:
    
Lung volumes remain low with patchy bibasilar opacities favoring bibasilar atelectasis , although pneumonia should also be considered in the correct clinical setting . Possible left effusion versus pleural thickening . No evidence of pulmonary edema . The heart remains enlarged . Mediastinal contours are stable . No pneumothorax .