Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Is portable upright AP chest radiograph shows new subsegmental atelectasis at the right lung base and right pericardiac region and unchanged linear scar at the left lung base . Although the overall cardiac size remains within normal limits , the left heart border has lost its concavity and there is some mild redistribution of pulmonary blood flow to the upper lobes without haziness or edema . Several small , sub cm , calcified lymph nodes are seen in the right perihilar region and these are new . No pneumothorax is seen status post thermoplasty .
    OUTPUT:
    
Redistribution of pulmonary blood flow to the upper lobes without current edema . Subsegmental atelectasis at the right base and right middle lobe and a calcified right perihilar lymph nodes are new compared to the patient 's previous studies from ___ .