Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph through the chest demonstrates low lung volumes with mild elevation of the right hemidiaphragm , present on prior examination and unchanged . No focal consolidation is identified , concerning for pneumonia . The cardiomediastinal and hilar contours are within normal limits . There is no pleural effusion or pneumothorax identified . No evidence of free air is seen beneath the diaphragms .
    OUTPUT:
    
No acute cardiopulmonary process .