Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . Left PICC is no longer visualized . The patient remains rotated to the left . The right lung is grossly clear . There is dense retrocardiac opacity seen laterally silhouetting the lateral aspect of the hemidiaphragm . Osseous structures are again notable for partially visualized lower thoracic spinal hardware which is not well assessed . No free air is seen below the diaphragm on this semi-erect film .
    OUTPUT:
    
Left basilar opacity potentially due to atelectasis noting that infection is not excluded . Consider repeat PA and lateral if the patient is amenable .