Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to prior chest radiograph , the intra-aortic balloon pump is inappropriately located approximately 6 - 7 cm from superior aspect of the aortic knob . Lung volumes are stable . Unchanged bibasilar atelectasis . Stable enlargement of the cardiomediastinal silhouette . Unchanged bilateral small pleural effusions . The osseous structures are stable . The left PICC line terminates in the mid SVC .
    OUTPUT:
    
1 . Malposition of the intra-aortic balloon pump . 2 . Otherwise , no significant change from prior exam .