Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright chest radiograph was provided . The heart is mildly enlarged . Lung volumes are low which limits evaluation . There is subtle haziness in the right lower lung which could represent underpenetrated technique , though the possibility of a partially layering right effusion is not excluded . There is no pneumothorax . The left lung appears clear . Bony structures appear intact . Clips are noted in the superior mediastinum , unchanged . There is a calcified rounded structure again noted in the right upper quadrant compatible with hepatic lesion .
    OUTPUT:
    
Low lung volumes , mild cardiomegaly , subtle haziness in the right lower lung which may represent a partially layering right effusion .