Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: When compared to prior , there has been no significant interval change . Severe enlargement of the cardiac silhouette and tortuosity of the descending thoracic aorta is again noted . Vague right basilar opacity is unchanged from prior exam and may be due to atelectasis in setting of low lung volumes . There is no overt edema . No acute osseous abnormalities .
    OUTPUT:
    
Low lung volume with right basilar opacity , likely atelectasis . No definite acute cardiopulmonary process .