Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left lower lung opacity likely from combination of mild effusion and lower lung atelectasis is new since ___ . Left Upper and right lung are clear . Heart size is top normal . Hilar contours are within normal limit . Mild indentation along left lateral tracheal wall just above the supraclavicular region is due to large thyroid goiter , better evaluated on chest CT from ___ . There is no evidence of pneumothorax . Minimal amount anterior mediastinum air demonstrated on chest CT ___ is beyond the resolution of chest radiograph .
    OUTPUT:
    
1 . Mild left pleural effusion and lower lung atelectasis , new since ___ . 2 . No pneumothorax . 3 . Minimal anterior mediastinum air demonstrated on chest CT dated ___ is not demomstrated on radiograph . 4 . Large thyroid goiter causing mild indentation on tracheal air columns is better assessed on chest CT .