Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are extremely low , there is vascular congestion without overt edema . No focal airspace opacity is identified . There is no pleural effusion or pneumothorax . The mediastinal contours are normal . The heart size is mildly enlarged , and unchanged . Vertebral body compression fractures are present , and likely chronic .
    OUTPUT:
    
Mild vascular congestion and mild cardiomegaly . No overt pulmonary edema .