Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart is upper limits of normal in size . The aorta is tortuous . Prominence of the central pulmonary artery suggests the possibility of pulmonary arterial hypertension . Lungs are clear , with the exception of minimal linear scar or atelectasis at the extreme bases . Lung volumes appear increased . No pleural effusion or acute skeletal findings .
    OUTPUT:
    
1 . Prominent central pulmonary vascularity suggesting possible pulmonary arterial hypertension . 2 . No acute pulmonary abnormality .