Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are relatively low lung volumes . The cardiac and mediastinal silhouettes are likely exaggerated by AP supine , AP technique , however , if there is concern for acute mediastinal process , chest CT is more sensitive . The cardiac silhouette is mildly enlarged . There is mild pulmonary edema . No focal consolidation , pleural effusion , or evidence of pneumothorax is seen .
    OUTPUT:
    
Cardiomediastinal silhouette may be exaggerated by low lung volumes and supine , portable AP technique , however , if there is concern for an acute mediastinal process , CT is more sensitive . Mild pulmonary vascular congestion .