Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mild to moderately enlarged . The mediastinal and hilar contours appear unchanged . The lung volumes are low . There is no pleural effusion or pneumothorax . A opacity in the right lower lobe appears similar and suggests pneumonia . A nodular opacity projecting over the right lung can be persistently visualized , although somewhat less conspicuous .
    OUTPUT:
    
Persistent right basilar opacity suggesting pneumonia . Cardiomegaly . Follow - up radiographs are recommended to show complete resolution of abnormalities within eight weeks given concern for the possibility of underlying lung nodule in the right lung .