Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are symmetrically well expanded and well aerated , although lung volumes are slightly decreased from the most recent prior study . There is no focal consolidation concerning for pneumonia , pleural effusion or pneumothorax . The pulmonary vasculature is not engorged . The cardiac silhouette is normal in size , and the mediastinal and hilar contours are within normal limits . No acute osseous abnormality is detected .
    OUTPUT:
    
No acute cardiopulmonary process .