Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size , mediastinal and hilar contours are normal . On the frontal radiograph , lungs are grossly clear . On the lateral view , there is a question of increased opacity overlying the lower thoracic spine , possibly due to crowding of normal structures related to relatively low lung volumes . There are no pleural effusions or pneumothoraces .
    OUTPUT:
    
Questionable basilar lung opacity on lateral radiograph , possibly due to summation of normal structures related to low lung volumes . If clinical suspicion for infection persists , repeat radiograph with improved inspiratory level would be suggested for more complete evaluation of this region .