Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Allowing for low lung volumes and rotation , cardiac silhouette is probably mildly enlarged . Aorta is tortuous . Lungs are clear except for minor atelectasis at the lung bases .
    OUTPUT:
    
No pneumothorax or acute rib fracture detected on this portable examination , but correlation with subsequently performed CTA of the chest is suggested for more complete assessment given the limited sensitivity of portable radiographs for assessing rib injuries . Correlation with CTA results is also recommended for more complete assessment of the thoracic aorta .