Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a normal cardiomediastinal silhouette and fairly well - aerated lungs . An opacity projecting over the lower thoracic spine does not have a definite correlate on frontal view , and is likely due to a combination of respiratory motion artifact and overlapping bony structures . There is no pleural effusion or pneumothorax . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .