Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal , and hilar contours appear unchanged . There are patchy new opacities in the left mid - to - lower lung , predominantly in the lingula , but streaky in morphology . Otherwise , the lungs appear clear . There are no pleural effusions or pneumothorax . Moderate anterior osteophytes are present along the mid - to - lower thoracic spine .
    OUTPUT:
    
Patchy new left mid and lower lung opacities , typical in morphology for atelectasis , although an infectious etiology is difficult to completely exclude based on the imaging .