Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . Linear platelike atelectasis noted in the left lower lung . No signs of pneumonia or CHF . No pleural effusion or pneumothorax . Cardiomediastinal silhouette is normal . Bony structures appear intact . Degenerative changes of the right shoulder again noted .
    OUTPUT:
    
Platelike left lower lung atelectasis .