Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Subtle heterogeneous opacity in the right lower lobe is only seen on frontal projection . The lungs are otherwise well inflated with bibasilar atelectasis . A 1 .9 cm well - circumscribed circular lesion projecting over the right heart border has mildly increased since ___ . No pleural effusion or pneumothorax . Stable mild cardiomegaly is noted . Mediastinal contour and hila are unremarkable .
    OUTPUT:
    
1 . Subtle right lower lobe opacity only seen on frontal projection is most consistent with atelectasis . Clinical correlation recommended to assess for pneumonia in the appropriate clinical setting . 2 . 1 .9 cm right lower lobe nodule has mildly increased since ___ .