Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . There is no pleural effusion , pneumothorax or focal airspace consolidation . Atelectasis is seen at the left lung base , as shown on the subsequent CT . The heart size is top normal . The mediastinal and hilar structures are unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .