Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are relatively well expanded with mild atelectasis in the left lung base . The heart is mildly enlarged . The aorta is tortuous , with calcifications noted in the aortic arch . There is no pleural effusion , pulmonary edema , pneumothorax , or focal consolidation worrisome for pneumonia .
    OUTPUT:
    
Mild cardiomegaly . No evidence of pneumonia .