Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Focal eventration of the right hemidiaphragm is unchanged . On the lateral projection , a retrocardiac opacity is noted which has no correlate abnormality on the frontal view which raises potential concern for a lower lobe pneumonia . Please correlate clinically . No large effusion is seen . No pneumothorax . Cardiomediastinal silhouette appears normal . No acute bony abnormalities .
    OUTPUT:
    
Retrocardiac opacity seen on the lateral projection raises concern for a subtle left lower lobe pneumonia .