Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . Lung volumes are slightly low . There is minimal right basilar atelectasis . The lungs are otherwise clear . Mild cardiomegaly is increased compared to the prior study from ___ . Aortic knob calcification is seen . The mediastinal contours are normal . There are no pleural effusions . No pneumothorax is seen .
    OUTPUT:
    
1 . No acute cardiac or pulmonary process . 2 . Mild cardiomegaly , stable to mildly increased compared to the prior study from ___ .