Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a normal cardiomediastinal silhouette and well - aerated lungs which are without focal consolidation . There is mild left base atelectasis . No pleural effusion or pneumothorax is seen . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .