Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP upright portable view of the chest was obtained . There are relatively low lung volumes and minimal basilar atelectasis without definite focal consolidation . No large pleural effusion or pneumothorax is seen . The cardiac silhouette is top normal . Mediastinal contours are unremarkable .
    OUTPUT:
    
No definite acute cardiopulmonary process .