Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . The cardiac , mediastinal and hilar contours appear unchanged . There is streaky left mid to lower lung opacification which suggests atelectasis . This appearance blurs the left costophrenic sulcus , making it difficult to exclude a small pleural effusion . There is no evidence for pleural effusion on the right .
    OUTPUT:
    
Streaky left mid - to - lower lung opacities , which are probably compatible with atelectasis . If pulmonary symptoms are present or there is other clinical concern for pneumonia , then short - term followup PA and lateral radiographs could be considered to evaluate further .