Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Normal cardiomediastinal and hilar contours . Normal pleural surfaces . Low lung volumes with vascular crowding adjacent to the right heart border . Lungs are clear . No acute focal pneumonia , pleural effusion , pulmonary edema , or pneumothorax .
    OUTPUT:
    
No pulmonary edema or acute pneumonia .