Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Mild ground - glass opacities are seen involving the mid to lower lungs which raise potential concern for edema or atypical infection . Patient is known to have a 1 .6 cm nodular opacity in the left lower lobe which is difficult to visualize on the radiograph . No large effusion or pneumothorax is seen . The cardiomediastinal silhouette is normal . Bony structures are intact .
    OUTPUT:
    
Mid to lower lung ground - glass opacities raise concern for atypical infection versus edema . Known 1 .6 cm left lower lobe nodule better assessed on prior CT .