Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single semi-erect AP portable view of the chest was obtained . There are relatively low lung volumes , which accentuate the bronchovascular markings at the lung bases . Given this , no focal consolidation , large pleural effusion , or evidence of pneumothorax is seen . Cardiac and mediastinal silhouettes are unremarkable . No overt pulmonary edema is seen .
    OUTPUT:
    
Low lung volumes . Otherwise , no acute cardiopulmonary process .