Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable semi upright frontal chest radiograph demonstrates moderately well expanded and clear lungs with bibasilar atelectasis . Right middle lobe opacity with preservation of the diaphragm and heart borders is most consistent with epicardial fat . No pleural effusion or pneumothorax . Mild cardiomegaly is likely accentuated due to patient positioning . Mediastinal contour and hila are otherwise unremarkable . Limited assessment of the upper abdomen is within normal limits .
    OUTPUT:
    
No acute cardiopulmonary process .