Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are normal . Parenchymal opacity in the posterior aspect of the left lower lobe is consistent with pneumonia . There is no effusion or pneumothorax . Mediastinal and hilar contours are normal . Heart size normal . Mid thoracic dextroscoliosis is noted .
    OUTPUT:
    
Left lower lobe pneumonia . Recommend follow - up chest radiographs in ___ weeks following antibiotic therapy to assess resolution .