Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph ___ at 16 : 19 is submitted .
    OUTPUT:
    
Bibasilar linear opacities favor scarring , post inflammatory change , or atelectasis especially as the right hemidiaphragm is tented and elevated consistent with volume loss . No developing focal airspace consolidation is seen to suggest pneumonia , although outside CT dated ___ does demonstrate patchy areas of ground - glass opacity in the left upper lobe and a more consolidative process in the right posterior medial lower lobe which was felt to represent atelectasis , neither of which were well seen on plain radiography . There is a right lateral and basilar pleural effusion which is unchanged . Overall cardiac and mediastinal contours are stable . No pneumothorax or pulmonary edema .