Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . Coronary calcification is present . The mediastinal and hilar contours appear unchanged . There is vague opacity projecting over the left lower lung which is not well localized on the lateral view although suspected to reside in the left lower lobe . There are no pleural effusions or pneumothorax .
    OUTPUT:
    
Vague streaky opacities in the left lower lung , most likely in the left lower lobe , suggesting minor atelectasis . Correlation with clinical presentation is suggested regarding the less likely possibility of pneumonia .