Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is focal opacity at the right cardiophrenic angle localizing to the lower lobe . Elsewhere , the lungs are otherwise clear without focal consolidation , effusion , or pneumothorax . There is a laterally convex margin the right mediastinal contour suggesting dilation of the ascending thoracic aorta . Cardiomediastinal silhouette is although waist unremarkable . No acute osseous abnormalities .
    OUTPUT:
    
1 . Parenchymal opacity at the right lung base , nonspecific , potentially atelectasis . 2 . Findings suggestive of a grossly dilated ascending thoracic aorta for which cross-sectional imaging is suggested to further characterize .