Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate persistently low lung volumes with chronic atelectasis , which limited evaluation of the cardiac silhouette . There is mild scarring at the right base . Obscuration of the medial left hemidiaphragm is likely due to atelectasis . No focal consolidation , pleural effusion , or pneumothorax is seen . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .