Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As seen on recently obtained chest radiograph , there are bibasilar opacities in a bronchovascular distribution , which are exacerbated by low lung volumes . Cardiomediastinal silhouette is normal , and the descending thoracic aorta is tortuous and calcified . No pleural effusion or pneumothorax .
    OUTPUT:
    
Bibasilar opacities as seen on recently obtained chest radiograph , thin concern for pneumonia .