Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest are compared to previous exam from ___ . Previously seen left PICC and anterior chest wall drainage catheter are no longer seen . Persistent mild blunting seen at the left greater than right lateral costophrenic angles , potentially due to small effusions or pleural thickening . There is no pneumothorax . Elsewhere , the lungs are clear . Cardiomediastinal silhouette is unchanged as are the osseous and soft tissue structures .
    OUTPUT:
    
No acute cardiopulmonary process .