Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left retrocardiac moderate atelectasis appears new since the ___ CT examination . There is no pneumothorax or pleural effusion . The heart is mildly enlarged , and the aorta moderately tortuous . The hilar and mediastinal contours are within normal limits .
    OUTPUT:
    
Moderate left lower lobe atelectasis , new since ___ . No definite consolidation . If symptoms persist , short - term followup radiograph can be obtained to reassess this region . The initial interpretation was made by Dr . ___ at 11 :58 a .m . on ___ , and communicated to ___ via telephone at 12 :05 p .m .