Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Assessment is limited due to poor positioning as well as the patient 's body habitus . Allowing for these limitations : Compared with the previous exam there has been interval improvement of prior interstitial pulmonary edema as well as aeration of the left lower lobe . There is persistent prominence of the left hilum , likely a combination of a very tortuous aorta with an enlarged pulmonary artery , better demonstrated on prior CT . A small left - sided pleural effusion may be present although difficult to assess . There is no right - sided effusion . Significant rightward deviation of the trachea is also stable . A right femoral pacemaker is redemonstrated with leads in stable position . Assessment of cardiac size is limited although appears stable . Rotolevoscoliosis centered in the lower thoracic spine is also stable .
    OUTPUT:
    
1 . Persistent left hilar engorgement may be related to superimposition of a tortuous aorta with an enlarged pulmonary artery . Superimposed perihilar consolidation can not be completely excluded , however . 2 . Improved aeration of the left lower lobe compared with radiograph from ___ . 3 . Unchanged rotolevoscoliosis and rightward deviation of the trachea .