Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Two frontal images of the chest again demonstrate opacification in the left lower lobe with some volume loss . There is a lucency near left costophrenic angle that could represent loculated fluid with trapped air verses pneumothorax verses atypical appearance of stomach bubble . Follow up upright chest radiograph with the patient swallowing 15 cc of barium just prior to imaging should help rule out these etiologies . The lungs are otherwise well expanded and clear . There is no right pleural effusion . Cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
Possible area of loculated fluid with trapped air verses pneumothorax verses atypical appearance of stomach bubble near the left CPA . Follow up upright chest radiograph with the patient swallowing 15 cc of barium just prior to imaging should help rule out these etiologies .