Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . There is a patchy linear opacity projecting along the lingula , as before , suggesting persistent minor atelectasis or scarring . Streaky right upper lobe opacities suggest scarring with post-operative suture material that is unchanged . There is no pleural effusion or pneumothorax . The patient is status post partly visualized posterior upper lumbar fusion . Volume loss and sclerosis along thoracolumbar vertebral bodies at the site of fusion and immediately above appear probably unchanged . The patient is also status post anterior neck fusion .
    OUTPUT:
    
Chronic opacities suggesting minor scarring without definite evidence for acute disease .