Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes . There is no focal consolidation , pleural effusion , or pneumothorax . Bronchovascular markings are prominent , likely due to low lung volumes . Hilar and mediastinal silhouettes are unremarkable . The heart size is top normal . There is no pneumothorax . Linear opacity projecting over right lung apex is likely external to the patient . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
Low lung volumes . No evidence of acute cardiopulmonary process .