Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable view of the chest demonstrates low lung volumes , which accentuate bronchovascular markings . There is no focal consolidation , pleural effusions , or pneumothorax . Hilar and mediastinal silhouettes are unremarkable . Heart size is normal . There is no pulmonary edema . Linear opacities at the lung bases most likely represent atelectasis . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .