Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Tortuous aorta and dextroscoliosis of the T - spine appear similar to prior exam . Posterior left lower lobe opacity is new . Small pleural effusions bilaterally . No pneumothorax .
    OUTPUT:
    
1 . Left lower lobe pneumonia . Followup imaging is recommended four weeks after completion of therapy . 2 . Small pleural effusions bilaterally .