Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged allowing for differences in technique including leftward rotation . There is newly apparent but vague medial right basilar opacity , also detectable on the lateral view . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Medial right basilar opacity . Pneumonia is a differential consideration but atelectasis could also be considered . Reimaging with standard PA and lateral radiographs may be helpful if there is a diagnostic dilemma .