Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Study is slightly limited by lordotic positioning . Heart size remains moderately enlarged . The mediastinal and hilar contours are unremarkable . Pulmonary vasculature is not engorged . Apart from minimal atelectasis in the left lung base , the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary abnormality .