Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrate clear lungs bilaterally . Heart is mildly enlarged . Hilar contours are normal . There is no pleural effusion , pulmonary edema or pneumothorax . There is no air in the right hemidiaphragm .
    OUTPUT:
    
No acute intrathoracic abnormality . Mild cardiomegaly .