Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are low in volume . An apparent new nodular focus projecting over the left mid lung may represent an artifactual confluence of shadows versus a true lung nodule . Otherwise , the lung fields appear clear . The cardiomediastinal silhouette , hilar contours , and pleural surfaces are normal . No pleural effusion or pneumothorax is present .
    OUTPUT:
    
1 . No acute intrathoracic process . 2 . Newly apparent nodular opacity projecting over the left mid lung , possibly a lung nodule versus artifact ; when clinically appropriate , repeat PA and lateral radiographs are recommended to evaluate further or alternatively chest CT could be considered .