Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable chest radiograph demonstrates bilateral low lung volumes with assymetry reduction in the left lung volume as well as assymetric increased opacification of left lung density . In the setting of notable left pleural thickening and decreased intercostal spacing , findings are consistent with trapped lung . Focal opacification noted within the lingula corresponds with atelectasis and scarring identified on the ___ CT . No focal opacification evident within the right lung though there may be a small amount of pulmonary edema . The apparent widening of the mediastinum is likely due to medial pleural thickening . The hilar and heart size are unremarkable . Left partial mastectomy evident .
    OUTPUT:
    
No pneumothorax . Findings associated with trapped left lung due to thickened pleura .