Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral radiographs of the chest once again demonstrate a diffuse pattern of heterogeneous opacity in the bilateral lower lobes and right middle lobe surrounding thin - walled radiolucent structures consistent with the patient 's history of chronic severe bronchiolitis . When compared to the most recent study from ___ , there is equivocal increased opacities in the right middle lobe . The upper lung fields are clear . There is no pneumothorax or pleural effusion . The cardiomediastinal contours are normal . Pulmonary vascularity is normal and there is no pulmonary edema .
    OUTPUT:
    
Equivocal increase in right middle lobe opacity may suggest an early infectious process superimposed on severe chronic bronchiectasis .