Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged but unchanged . The aorta is markedly tortuous . Mediastinal and hilar contours are otherwise unremarkable . Pulmonary vasculature is not engorged . Linear opacities in the right lung base likely reflect areas of subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . No subdiaphragmatic free air is present . Severe dextroscoliosis of the thoracic spine is re - demonstrated .
    OUTPUT:
    
Subsegmental right basilar atelectasis . No subdiaphragmatic free air .