Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest was obtained . There is linear lateral left lower lobe opacity likely representing atelectasis / scarring . No focal consolidation seen . There is no pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are unremarkable . Partially imaged residual contrast is seen in the bowel in the left upper quadrant presumed from upper GI series with small bowel follow - through performed one day prior .
    OUTPUT:
    
No acute cardiopulmonary process .