Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta is mildly unfolded . The mediastinal and hilar contours are normal . Pulmonary vasculature is not engorged . No focal consolidation , pleural effusion or pneumothorax is present . Triangular 8 mm focal opacity projects over the left mid lung field on the frontal view . There are no acute osseous abnormalities .
    OUTPUT:
    
1 . No acute cardiopulmonary abnormality . 2 . 8 mm triangular focal opacity projecting over the left mid lung field . This could reflect a pulmonary nodule , and oblique views may be helpful for further assessment .