Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Atherosclerotic calcifications are noted at the aortic knob . Mediastinal and hilar contours are otherwise unremarkable . Pulmonary vasculature is normal . Small left pleural effusion is noted , new from the prior study . Minimal atelectasis is demonstrated in the left lung base . No focal consolidation or pneumothorax is present . No acute osseous abnormality is detected .
    OUTPUT:
    
Small left pleural effusion and minimal left basilar atelectasis .