Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild to moderate cardiomegaly is present . The aorta is tortuous . Hilar contours are unremarkable . Pulmonary vasculature is not engorged . Minimal atelectasis is seen in the lung bases without focal consolidation . No pleural effusion or pneumothorax is present . 4 mm nodular opacity projects over the right upper lobe . No acute osseous abnormalities are detected .
    OUTPUT:
    
1 . No acute cardiopulmonary abnormality . 2 . 4 mm nodular opacity projecting over the right upper lobe . This could reflect a vessel on end rather than a true pulmonary nodule . Dedicated PA view of the chest with shallow obliques is recommended to determine if this is a true pulmonary nodule .