Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral radiographs of the chest demonstrate multifocal airspace opacities , predominantly in the right middle , right lower , and left lower lung fields . Because the patient has had a significant prior pathology at these locations , it is assumed that these represent chronic scarring or inflammatory changes . However , if the patient has experienced infectious symptoms , new multifocal pneumonia with a similar distribution can not be excluded . The heart size is normal , and there is no pulmonary vascular engorgement , nor interstitial pulmonary edema . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
1 . No evidence of congestive heart failure . 2 . Multifocal bilateral airspace opacities in the middle and lower lung zones likely represent chronic scarring ; however , acute infectious process can not be excluded if there are other clinical indications of pneumonia .