Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral chest radiograph was obtained . The lungs are low in volume with increased interstitial opacity consistent with the chest CT findings of interstitial lung disease . Bibasilar atelectasis is noted without pneumothorax or pleural effusion . Mediastinal and hilar contours as well as cardiac size are unremarkable with post CABG changes noted . The left rib fracture seen on CT is not identified on these views .
    OUTPUT:
    
No acute intrathoracic process with left lateral 6th rib fracture and interstitial lung disease better characterized on the concurrently obtained CT .