Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in semi-upright position . Comparison is made with a similar preceding examination obtained one day earlier . The findings are completely unchanged . Port - A - Cath system as before . Heart size and mediastinal structures are unchanged . Crowded pulmonary vasculature , as before , indicating poor inspirational effort , but no evidence of any new parenchymal infiltrates . Diaphragmatic contours well delineated and lateral pleural sinuses are free .
    OUTPUT:
    
Unchanged chest findings , no evidence of acute aspiration .