Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Patchy right lower lobe opacity is worrisome for pneumonia or aspiration . There is also subtle left base retrocardiac opacity as well . No pleural effusion is seen . There is no pneumothorax . Cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Patchy right lower lobe opacity and possible left retrocardiac opacity concerning for infection and / or aspiration .