Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest are obtained . Bilateral nipple shadows should not be confused for pulmonary nodules . There is mild left base atelectasis . No focal consolidation , pleural effusion , or evidence of pneumothorax is seen . Subtle opacity in lateral left upper hemithorax is stable since ___ and likely since ___ , suggesting benignity . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
No significant interval change . No acute cardiopulmonary process .