Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size , mediastinal and hilar contours are normal . Lungs are clear . Small left pleural effusion is present and has decreased in size since the previous chest radiograph . There is no evidence of right pleural effusion or pneumothorax . No acute , displaced rib fracture is identified , but a portion of the lower right lateral rib cage has been excluded from the study and can not be evaluated . Compression fracture at thoracolumbar junction , unchanged since prior study .
    OUTPUT:
    
1 . No evidence of pneumonia or pleural abnormality in the right lung to account for the patient 's symptoms . If a rib fracture is suspected clinically , dedicated rib radiographs may be considered . 2 . Small left pleural effusion , decreased since ___ .