Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low compared to prior exams with associated slightly increased bronchovascular crowding . Chronic prominent interstitial markings are again seen , similar to prior exams . No definite focal consolidation is seen . Possible right basilar atelectasis . Subtle right basilar patchy opacity may be due to atelectasis , underlying subtle consolidation due to aspiration , contusion , or pneumonia not excluded . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is unremarkable . No definite rib fracture is seen .
    OUTPUT:
    
1 . Subtle right basilar patchy opacity may be due to atelectasis , underlying subtle consolidation due to aspiration , contusion , or pneumonia not excluded . 2 . No definite rib fracture , although standard chest radiographs are insensitive for a rib fractures . If concern for fracture persists , dedicated rib films with sites of focal tenderness marked with a BB or CT is more sensitive . 3 . Chronic prominent interstitial markings , similar prior exams .