Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Streaky , relatively linear left lower lung opacity likely represents atelectasis or scarring . No definite focal consolidation is seen . Minimal blunting of the left costophrenic angle most likely represents atelectasis , less likely trace pleural effusion . No pneumothorax is seen . No evidence of free air is seen beneath the diaphragms . The cardiac silhouette is top - normal to mildly enlarged . Mediastinal contours are unremarkable .
    OUTPUT:
    
Streaky relatively linear left lower lung opacity likely represents atelectasis and / or scarring . No no evidence of free air beneath the diaphragms .