Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are grossly clear without consolidation noting that the left lung apex is obscured by patient 's face . Opacity at the left lung base laterally is compatible with prominent fat pad seen on prior CT . Chronic underlying parenchymal changes are noted , particularly noted at the right upper lung . Cardiomediastinal silhouette is unchanged . Enlarged pulmonary arteries are again noted as well as dense atherosclerotic calcification in the thoracic aorta which is tortuous .
    OUTPUT:
    
No definite acute cardiopulmonary process .