Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are low in volume but otehrwise clear . Left hemidiaphragm is somewhat obscured in its lateral - most component , though this could be projectional . The left lung base is poorly imaged . There is no definite pleural effusion or pneumothorax . Stable marked cardiomegaly is noted .
    OUTPUT:
    
Questionable opacity in left base . When the patient 's clinical status improves , repeat evaluation by PA and lateral chest radiograph is recommended to exclude a pleural effusion or left basilar parenchymal process .