Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are poorly expanded , accounting for some bronchovascular crowding . Allowing for these limitations , there is a patchy opacity in the left lower lung field which partially obscures the left heart border . No other focal opacities are present . Previously noted right apical and upper lobe opacities in the CT torso are not clearly seen in this exam . Cardiac size appears mildly enlarged although can not be properly assessed due to obscuration of the left heart border . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Left lower lung pneumonia .