Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The previously seen right - sided PICC is no longer seen . Chain sutures are again seen overlying the left mid lung with areas of scarring . There is left base atelectasis / scarring . No new focal consolidation is seen . There is no pleural effusion . The aortic arch is calcified . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Chronic changes without definite acute cardiopulmonary process .