Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP view of the chest provided . Focal nodular opacity in the left lower lung is new from prior . Differential includes aspiration / pneumonia , scarring or true pulmonary nodule . Otherwise the lungs are clear . There is no effusion , or pneumothorax . The cardiomediastinal silhouette is normal . Multiple old left rib deformities are noted . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Focal nodular opacity in the left lower lung , new from prior . Differential considerations include aspiration / pneumonia , scarring , pneumonia or true pulmonary nodule . F / u to resolution .