Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear opacity extending laterally from the left hilum is likely atelectasis versus scarring . New compared to most recent exam are subtle areas opacity at the lung bases , likely in part within the right middle lobe . Bibasilar regions of bronchiectasis were better seen on prior CT scan . Cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Subtle bibasilar opacities worrisome for multifocal infection . Known bronchiectasis was better seen on prior CT scan .