Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A ventriculoperitoneal shunt courses through the soft tissues and into the abdomen . The lung volumes are low which causes crowding of the bronchovascular structures . There is mild vascular congestion and moderate cardiomegaly . There is no pulmonary edema , effusion or pneumothorax . The aortic knob is calcified .
    OUTPUT:
    
Moderate cardiomegaly and mild vascular congestion .