Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is enlarged and the structures of the mediastinum are shifted to the left . There is elevation of the right hemidiaphragm . The lung volumes are low and there is some opacification at the base of the right lung consistent with atelectasis . Additionally , there is a small pleural effusion on the right . There is no evidence of pneumothorax .
    OUTPUT:
    
1 . Elevated right hemidiaphragm , which is pushing the heart and structures of the mediastinum to the left . 2 . Atelectasis at the base of the right lung and small right pleural effusion . No evidence of pneumonia or pulmonary edema .