Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top normal . The aorta is unfolded . Pulmonary vascularity is normal . Focal 15 mm opacity within the left apex appears new compared to the prior study , and could reflect progressive pulmonary parenchymal scarring . Mild scarring is also noted within the right apex , similar compared to the prior exam . Remainder of the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
1 . No acute cardiopulmonary abnormality . 2 . Left apical focal opacity , new from the prior exam . This could reflect an area of scarring , though further assessment with a nonemergent CT is recommended .