Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . As before , there are streaky left lower lung opacities , most likely atelectasis and / or scarring . A more nodular component in this region likely represents a pulmonary nodule , as seen on prior CT from ___ . A small left pleural effusion is not significantly changed . There is no right pleural effusion . No pneumothorax is seen . The heart size is normal . The mediastinal contours are normal .
    OUTPUT:
    
1 . No radiographic explanation for patient 's right arm weakness . Left lower lung atelectasis / scarring and a pulmonary nodule are similar in appearance . 2 . Unchanged small left pleural effusion .