Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Background density of the lung parenchyma is increased though stable . However , subtle irregular opacities in the right upper and lower lungs are increased from prior and may reflect underlying allergic alveolitis . Non-emergent pulmonary evaluation is recommended . There is no confluent consolidation concerning for pneumonia . No pneumothorax is evident . There is no vascular congestion or pleural effusions . Cardiomediastinal and hilar contours are within normal limits . Deformity of the seventh posterior right rib is unchanged from prior and corresponds with a healed fracture . No acute rib fracture is identified . Visualized vertebral bodies in the mid-thoracic spine demonstrate preserved height without compression deformity .
    OUTPUT:
    
1 . No acute cardiopulmonary process . No pneumothorax . 2 . Healed fracture of the right posterior seventh rib . No new fractures . 3 . Subtle irregular opacities suggest an underlying chronic lung disease . Non-emergent clinical pulmonary evaluation is recommended .