Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are within normal limits and without change . Lungs are remarkable for focal linear scar or atelectasis in the right middle in both lower lobes . Additionally , the lower left heart border appears less distinct than on the prior study with adjacent subtle increase in opacity in this region . There are no pleural effusions or acute skeletal findings .
    OUTPUT:
    
Possible focal lingular pneumonia . Consider followup chest radiographs in 4 weeks after completion of antibiotic therapy to ensure resolution .