Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without focal consolidation . Previously questioned lucency at the left lung base is not long seen and was likely artifactual . The cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . Degenerative changes about both AC joints are noted .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .