Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a normal cardiomediastinal silhouette and hyperinflated lungs , unchanged compared to prior exams . There is no focal consolidation , pleural effusion , or pneumothorax . Mild calcification of the aortic knob is noted and unchanged . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Hyperinflated lungs .