Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The exam is underpenetration , presumed due to patient body habitus . Relative haziness of the lung bases on the frontal view is most likely in large part due to overlying soft tissue . On the lateral view , there is a patchy opacity projecting over the heart , difficult to discern on the frontal view whether this in the right middle lobe or the lingula , but also present on ___ and grossly stable since ___ and may represent chronic atelectasis / scarring . The left base retrocardiac region is difficult to assess . No pleural effusion or pneumothorax is seen . The cardiac silhouette remains enlarged . Mediastinal contours are stable .
    OUTPUT:
    
Suboptimal study due to underpenetration , presumed due to patient body habitus . Patchy opacity projecting over the cardiac silhouette on lateral view was likely also present on ___ and grossly stable since ___ and may represent chronic atelectasis / scarring .