Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP view and low lung volumes combine to exaggerate top normal heart size and there is no edema , but lung , hilar , and mediastinal vessels are mildly dilated . There is no focal consolidation or pleural effusion . Otherwise , hilar and mediastinal silhouettes are unremarkable . Port - A - Cath tip projects over cavoatrial junction .
    OUTPUT:
    
Low lung volumes . Borderline cardiac decompensation . No evidence of pneumonia .