Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The tip of the right PICC line is not visualized due to overlying spinal hardware . Low bilateral lung volumes with an unchanged retrocardiac opacity and pulmonary edema . Unchanged small bilateral pleural effusions . No pneumothorax identified . The size the cardiac silhouette is enlarged but unchanged .
    OUTPUT:
    
No significant interval change since the prior examination .