Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without focal opacity , pleural effusion or pneumothorax . The heart size is mildly enlarged . The mediastinal contours are normal . A right Port - A - Cath ends in the mid superior vena cava . There is no free air beneath the right hemidiaphragm .
    OUTPUT:
    
No acute intrathoracic process . Mild cardiomegaly .