Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are large for patient 's age . The left basilar opacity is most likely mediastinal fat as seen on CT chest ___ . No evidence of pneumonia . There are atherosclerotic calcifications within the aortic arch . Dilated pulmonary vessels in the right upper lung without evidence of pulmonary edema . Mild cardiomegaly with no pleural effusion . Cardiomediastinal borders are normal . Hilar structures are normal .
    OUTPUT:
    
Left basilar opacity is most likely mediastinal fat , as seen on from CT chest ___ . No evidence of pneumonia .