Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate low lung volumes , which demonstrate bronchovascular markings . Hilar and mediastinal silhouettes are unremarkable . Heart size is top normal . Left costophrenic angle is obscured , suggestive of possible small pleural effusion . There is no right pleural effusion . No pneumothorax . Interstitial markings are prominent . No focal consolidation is seen .
    OUTPUT:
    
Low lung volumes . No radiographic evidence of pneumonia .