Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP semi-erect view of the chest was reviewed and compared to the prior studies . The right upper lobe opacity could be due to pneumonia or asymmetric pulmonary edema , in a pattern seen particularly in mitral regurgitation . A small pericardial effusion is of undetermined chronicity . Mild - to - moderate cardiomegaly is unchanged , and pleural and mediastinal contours are normal .
    OUTPUT:
    
1 . New increased right upper lobe opacity could be due to pneumonia or asymmetric pulmonary edema seen particularly in mitral regurgitation . 2 . Unchanged mild - to - moderate cardiomegaly . 3 . Small pericardial effusion , of indeterminate chronicity .