Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Streaky left base retrocardiac opacity is seen , which may be due to atelectasis . No definite new focal consolidation is seen . There is no large pleural effusion or pneumothorax . Cardiac and mediastinal silhouettes are stable , as are the hilar contours . No overt pulmonary edema is seen .
    OUTPUT:
    
No significant interval change . Streaky retrocardiac opacities may be due to atelectasis .