Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable upright view of the chest was obtained . Cardiomediastinal silhouette including moderate cardiomegaly is unchanged . Lungs are persistently hyperinflated , reflecting chronic small airway obstruction and / or emphysema . A streaky left basilar opacity likely represents atelectasis . There is no focal consolidation , pleural effusion or pneumothorax .
    OUTPUT:
    
No acute intrathoracic abnormality .