Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Somewhat linear opacities in the medial bilateral lower lungs are unchanged and likely reflect overlapping of structures and / or linear atelectasis . The lungs are otherwise clear without focal consolidation . No pleural effusion or pneumothorax . Mild cardiomegaly is unchanged . Cardiomediastinal hilar silhouettes are unremarkable .
    OUTPUT:
    
No acute cardiopulmonary abnormality .