Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right dialysis catheter tip projects over the right atrium . The lungs are clear without focal consolidation , pleural effusion or pneumothorax . Left linear atelectasis has improved . Pulmonary vasculature is within normal limits . Heart size is normal . Mediastinal silhouette and hilar contours are normal . Mild loss of vertebral body heights in the thoracic spine is similar to prior . Anterior costochondral fractures are noted , left more than right .
    OUTPUT:
    
No pneumonia , edema , or effusion .