Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Large right pleural effusion is slightly increased in size compared to the previous study . Trace left pleural effusion is likely unchanged in the interval . Compressive bibasilar atelectasis is re - demonstrated . The heart size is difficult to assess given the presence of the large right pleural effusion . Atherosclerotic calcifications are noted diffusely throughout the thoracic aorta . No pulmonary vascular congestion is present . There is no pneumothorax . No acute osseous abnormality is detected .
    OUTPUT:
    
Slight interval increase in size of large right pleural effusion and relatively unchanged trace left pleural effusion . Bibasilar compressive atelectasis .