Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , without focal consolidation . The cardiomediastinal silhouette is unchanged . There is no pneumothorax . Prior right posterior rib fractures with deformity are again seen . There are small bilateral effusions and bibasilar atelectasis . Severe degenerative changes of the right acromioclavicular and glenohumeral joint again seen . Bilateral high riding humeral heads likely reflect chronic rotator cuff disease .
    OUTPUT:
    
No evidence of pneumonia . Small bilateral pleural effusions .