Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . Lungs are essentially clear . Minimal persistent opacity at the left lateral costophrenic angle is most likely due to atelectasis . There is no evidence of effusion or pulmonary vascular congestion . Cardiomediastinal silhouette is within normal limits . Atherosclerotic calcifications noted at the aortic arch . Vertebroplasty changes seen in the mid thoracic spine . Known compression deformities are not as clearly identified on the current exam due to technique .
    OUTPUT:
    
No acute cardiopulmonary process .