Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There are relatively low lung volumes . Mild bibasilar atelectasis is seen . There is minimal blunting of the left posterior costophrenic angle which may be due to a trace effusion . No focal consolidation or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Minimal blunting of the posterior left costophrenic angle , new since the prior study , may be due to a trace pleural effusion . Minimal bibasilar atelectasis .