Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are normal . There is no focal consolidation , effusion , or pneumothorax . Mediastinal and hilar contours are normal . Heart is mildly enlarged , as demonstrated on prior PET - CT from ___ .
    OUTPUT:
    
1 . No acute intrathoracic process . 2 . Mild cardiomegaly .