Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a linear right basilar opacity most suggestive of atelectasis . Increased mixed lucency and opacity seen in the retrocardiac region suggesting a moderate size hiatal hernia . Superiorly , the lungs are clear . Cardiac silhouette is mildly enlarged but likely exaggerated by technique . Mid to lower thoracic vertebroplasty changes are noted .
    OUTPUT:
    
Probable moderate hiatal hernia and right basilar atelectasis without definite superimposed acute cardiopulmonary process .