Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . Cardiomediastinal silhouette is stable . Lungs are symmetrically expanded . There is no focal consolidation . Linear bibasilar opacities likely represent atelectasis . There is no pleural effusion . No pneumothorax . Pulmonary vasculature is within normal limits .
    OUTPUT:
    
A subtle increased opacity in the right lower lobe , likely represents subsegmental atelectasis , very early pneumonia not excluded .