Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided hemodialysis catheter is seen to terminate in the right atrium . Lung volumes are low in volume with mild vascular congestion . Linear left mid lung opacity likely reflects atelectasis . Cardiomediastinal silhouette is prominent but likely due to low lung volumes . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Mild vascular congestion without overt edema .