Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are new heterogeneous opacities within the left lower lobe , concerning for pneumonia versus aspiration pneumonitis . Subtle heterogeneous opacities are also seen medially within the lower right lung , likely atelectasis , although aspiration or infection is not excluded . The lungs are otherwise clear . The heart is normal in size . The mediastinal contours are normal . There are left greater than right small pleural effusions . There is no pneumothorax .
    OUTPUT:
    
1 . Left lower lobe pneumonia versus aspiration pneumonitis . 2 . Minimal right lower lung atelectasis . Infection or aspiration pneumonitis this region is not excluded . 3 . Small bilateral pleural effusions , left greater than right .