Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is accentuated as a result and appears at least mild to moderately enlarged , similar to the previous study . The mediastinal and hilar contours are unchanged . There is no pulmonary edema . Patchy opacities in the lung bases are likely reflective of aspiration or pneumonia , greater on the right , and better assessed on the same day CT . No pleural effusion or pneumothorax is identified . No acute osseous abnormalities are present .
    OUTPUT:
    
Low lung volumes . Patchy opacities in the lung bases , more pronounced on the right , concerning for aspiration or pneumonia , as seen on the same day CT .