Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Right chest wall PICC pacer device is seen with pacer leads extending into the region of the right atrium and right ventricle . There is bandlike right lower lung opacity most compatible with atelectasis . A rounded density projecting at the right medial lung base on the frontal projection is without correlate opacity on the lateral view and therefore indeterminate . There is a retrocardiac opacity with subtle central air lucency which could represent a hiatal hernia . Cardiomediastinal silhouette appears normal . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
1 . Right basal atelectasis , with probable hiatal hernia . 2 . Rounded density projecting at the right medial lung base , indeterminate , for which CT of the chest is recommended to further assess .