Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable frontal chest radiograph again demonstrates intact sternal wires and a normal cardiomediastinal silhouette . Lung volumes remain slightly low , with mild atelectasis in the bilateral lung bases . There is no focal consolidation or appreciable pleural effusion or pneumothorax . Mild pulmonary edema is unchanged .
    OUTPUT:
    
1 . No focal consolidation . 2 . Slightly low lung volumes with mild bibasilar atelectasis and unchanged mild pulmonary edema compared to ___ .