Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient rotation limits assessment . Heart size is difficult to evaluate . Lung volumes are low . There is a small left pleural effusion with adjacent atelectasis , decreased from the prior examination . Atelectasis at the right base has increased . There is no focal consolidation . No pneumothorax . Reported rib fractures are not adequately evaluated .
    OUTPUT:
    
1 . Limited by patient rotation . 2 . Low lung volumes and bibasilar atelectasis . 3 . A small left pleural effusion , improved .